Viviscal Hair Growth Supplement for Women Review

Viviscal Hair Growth Supplements for Women offer a scientifically-backed solution designed to nourish thinning hair and promote existing hair growth, leading to visibly thicker and healthier-looking hair in as little as three months. This acclaimed supplement is formulated with the proprietary AminoMar™ collagen complex, a key ingredient that has been rigorously studied in ten clinical trials involving both women and men. With over 30 years of expertise, Viviscal has successfully assisted millions of women in reclaiming the vitality and fullness of their hair. The 100% drug-free formula is a blend of powerful AminoMar™ collagen complex alongside essential hair-healthy vitamins and minerals, including Biotin, Vitamin C, Iron, and Zinc. This unique combination works from within to address various factors that can impact hair health, such as stress, hormonal fluctuations, nutritional deficiencies, the natural aging process, menopause, post-pregnancy changes, hereditary predispositions, UV radiation exposure, and harsh hair treatments, all of which can contribute to thinning and excessive shedding. Viviscal's commitment to research is evident, with its effectiveness proven through extensive clinical testing conducted worldwide. The supplements are designed to be taken as two tablets daily with food and water, with optimal results typically observed after a consistent regimen of three to six months. It is important to note that while Viviscal is generally safe when used as directed, it is not suitable for individuals with a seafood allergy, pregnant or nursing women, or those under the age of 18. Consulting a healthcare professional is advised for anyone currently taking other medications. The product is versatile and effective for all hair types, providing a comprehensive approach to internal hair nourishment. Should the regimen be discontinued, the benefits experienced will gradually diminish as the natural hair growth cycle progresses. Viviscal stands as a trusted choice for women seeking to combat hair thinning and enhance overall hair health and thickness.

Product Focus: Hair GrowthAlso covers:Skin
Tier ⓘ
Tier 2
Tier 2 · Researched. Human studies show improvement in an aging-related function or a specific goal, and the reviews agree. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
84 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
80% of 37,624
Biohacker Mentions
10 of 10
Cost per month
$40

Study, Trial or Testing Result Summary

Members Only55 human studies · 34 improved

3 of these 55 human studies gave the ingredient by drip or injection, not by mouth.

55 human studies34 improved15 no effect101,612 people studied

The rules ranked this product mainly on niacin. In a 2005 trial of 60 women with female pattern hair loss, niacin creams on the scalp gave fuller hair than placebo over 6 months [1]. A niacinamide shampoo routine also cut shedding [2]. However, those studies applied niacin to the scalp, so it is unclear how this product's niacin tablet compares. Iron mainly helped women who were low in iron. In one study, 8 weeks of iron improved hair loss in 84.2 percent of anemic women who had it [3]. Women with hair loss often have low iron stores [4]. The marine complex has only one small study without a comparison group. That study used many products at once and did not name this complex [5]. Biotin here is well below the 1.25 milligrams that reduced hair fall in a trial [6]. Zinc is below the 50 milligrams that helped women with polycystic ovary syndrome [7]. Calcium is below the 1000 milligrams studied [8]. Vitamin C on its own has no good hair evidence [9]. Millet seed did not prevent hair loss during chemotherapy [10]. Horsetail has no human studies. Animal and cell studies are never counted.

See all 55 studies →Hide the studies

Review Totals and Summary

Members Only37,624 reviews · 80% positive
37,624 reviews · Amazon 30,033 · Ulta 4,020 · Target 1,665 · Walgreens 1,008 · Viviscal 898
80% positive0% neutral20% negative

Customer feedback for Viviscal Hair Growth Supplements for Women overwhelmingly highlights the product's remarkable effectiveness in addressing thinning hair and promoting new growth. Many users, initially skeptical after trying various other solutions without success, report experiencing significant improvements within a relatively short timeframe, often noting a visible difference in as little as two weeks for reduced shedding and more pronounced results within two to three months of consistent use. A recurring theme among positive reviews is the dramatic decrease in hair loss and shedding, with some describing their previous hair loss as "tumbleweeds" and then observing only a few strands after starting Viviscal. Beyond just reducing shedding, customers frequently praise the supplement for stimulating new hair growth and increasing overall hair thickness. Users have shared compelling testimonies, including visible new hair appearing along receding hairlines and part lines, contributing to a fuller and healthier appearance. This efficacy extends to various underlying causes of hair thinning, with individuals successfully combating hair loss linked to stress, the natural aging process, and even significant mental health challenges. The sentiment of trust and loyalty is strong, as evidenced by multiple customers who have been using Viviscal for years, some for over two decades, and continue to be delighted with the sustained benefits. These long-term users often refer to the product as "pure gold" and "absolutely fantastic," indicating its consistent performance over time. The ease of incorporating the tablets into a daily routine is also appreciated, although one reviewer did mention a "little unpleasant taste" as a minor drawback. Overall, the qualitative feedback underscores Viviscal's reputation as a highly recommended and clinically effective supplement for women seeking to achieve thicker, healthier, and more abundant hair.

Biohacker Summary

Members Only10 of 10 recommend it
10 of 10 biohackers on our panel recommend it

Niacin gets a mixed but mostly favorable response from the panel: four of the ten recommend it, two say they use it, and four stay neutral. Those who recommend it link it to raising NAD, with one preferring cheap flush niacin and another pointing to food sources like beef liver, chicken, turkey and fish, and two others pointing to niacinamide for skin health or to kick-start the morning body clock. One panelist takes enough niacin to flush about half an hour before a sauna session as part of a detox routine, and another uses a skin serum that contains niacinamide. The neutral voices mostly review data on skin appearance, deficiency, or NAD production without giving a verdict, no doses were given, and nobody reported stopping it. Zinc, vitamin C, iron and calcium are smaller ingredients in this product, with zinc the most praised of them, though one panelist warns that too much iron can be damaging.

See all 10 biohackers →Hide the biohackers
  • Dr. Eric Berg · Niacin · recommends
    • 19 Oct 2026 · recommends · Podcast ↗
      States that expensive NAD+ supplements only turn into $5 niacin in the body and that research has shown niacin can actually raise NAD levels in the blood 5 to 8 times their baseline levels.
    • 31 Oct 2026 · Zinc · recommends · YouTube ↗
      Recommends ensuring sufficient zinc intake because the prostate needs enough zinc for the conversion from testosterone to DHT to be smooth and optimized.
    • 30 Oct 2026 · Iron · neutral · YouTube ↗
      Identifies iron as the Achilles' heel of cancer, as it is needed for its DNA to replicate.
    • 26 Oct 2026 · Vitamin C · neutral · YouTube ↗
      Mentions that lemon is loaded with vitamin C, and when combined with coffee, vitamin C significantly increases the bioavailability of antioxidants in the coffee.
    • 25 Oct 2026 · Vitamin C · recommends · Facebook ↗
      Dr. Berg states that Vitamin C helps fight biofilms and is essential for making collagen in gums, teeth, and capillaries.
    • 25 Oct 2026 · Calcium · warns · YouTube ↗
      Warns that bone loss cannot be fixed with just calcium, as bone is primarily collagen with other essential minerals.
    • 24 Oct 2026 · Zinc · recommends · YouTube ↗
      Recommends taking zinc carnosine for an ulcer or some type of gastric problem.
    • 24 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends Vitamin C as a cofactor, especially for collagen.
    • 23 Oct 2026 · Zinc · recommends · YouTube ↗
      Emphasizes the importance of zinc for decreasing viral replication and recommends taking 40 to 60 mg every single day.
    • 23 Oct 2026 · Vitamin C · recommends · YouTube ↗
      States that high doses of vitamin C, like 2 to 4 grams, can greatly reduce inflammation and support the immune system.
    • 19 Oct 2026 · Zinc · neutral · YouTube ↗
      Notes that birth control pills deplete the body of zinc, which is needed for the brain to make serotonin.
    • 18 Oct 2026 · Zinc · uses · YouTube ↗
      Added zinc to his creatine product because a deficiency in zinc might make creatine not work as well.
    • 18 Oct 2026 · Zinc · neutral · YouTube ↗
      Mentions that grass-fed liver is loaded with zinc.
    • 18 Oct 2026 · Zinc · recommends · Facebook ↗
      Recommends zinc to enhance testosterone.
  • Dr. Mark Hyman · Niacin · neutral
    • 30 Sep 2026 · neutral · YouTube ↗
      Explains that pellagra, which killed 100,000 Americans, was a niacin deficiency, a B vitamin.
    • 21 Oct 2026 · Iron · neutral · YouTube ↗
      Mentions iron as an existing biomarker that plays a role in mental health, which Function Health includes in their measurements.
    • 12 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends vitamin C as a basic supplement during detoxification to help with inflammation and detoxification.
    • 7 Oct 2026 · Vitamin C · neutral · Podcast ↗
      Dr. Hyman mentions vitamin C as an advanced therapy for skin repair.
    • 7 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Mentions topical vitamin C as an antioxidant that can help skin with aging.
    • 7 Oct 2026 · Zinc · uses · YouTube ↗
      Gave a patient with psoriatic arthritis a little zinc, which contributed to significant improvement in her condition.
    • 6 Oct 2026 · Vitamin C · neutral · X ↗
      Mentions that what they do when a cold comes on is not just vitamin C.
    • 5 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends ensuring adequate vitamin C intake on a regular basis for immune support, stating it's important for healthy immune function despite mixed data on its effectiveness for colds.
    • 5 Oct 2026 · Zinc · recommends · YouTube ↗
      Recommends ensuring adequate zinc intake on a regular basis for immune support, noting some data on zinc lozenges for early cold.
    • 30 Sep 2026 · Vitamin C · neutral · YouTube ↗
      Mentions that vitamin C was the very first vitamin discovered, isolated, and synthesized in 1932, and its deficiency caused scurvy.
    • 22 Sep 2026 · Zinc · recommends · Instagram ↗
      Recommends correcting nutrient deficiencies with zinc.
    • 14 Sep 2026 · Vitamin C · recommends · Facebook ↗
      Recommends nutrient-dense foods rich in vitamin C, such as guavas and parsley, to reduce inflammation.
    • 14 Sep 2026 · Zinc · recommends · Facebook ↗
      Recommends nutrient-dense foods rich in zinc, such as pumpkin seeds and oysters, to reduce inflammation.
    • 9 Sep 2026 · Vitamin C · uses · YouTube ↗
      Used intravenous vitamin C cocktails to help him detoxify and recover from chronic fatigue.
  • Thomas DeLauer · Niacin · uses
    • 5 Sep 2026 · uses · YouTube ↗
      Uses niacin as part of their detoxification protocol, taking enough to flush about half an hour before a sauna session.
    • 26 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends taking vitamin C along with collagen about an hour before a workout for connective tissue benefits.
    • 23 Oct 2026 · Vitamin C · uses · YouTube ↗
      Uses vitamin C as part of their immunity duo, stating it is important for boosting the immune system, especially during cold and flu season.
    • 23 Oct 2026 · Zinc · uses · YouTube ↗
      Adds zinc to their immunity duo because it helps them absorb vitamin C, considering the two together a fantastic combination for fall and winter.
    • 8 Oct 2026 · Zinc · recommends · Facebook ↗
      Recommends zinc, noting it is a cofactor for enzymes that build neurotransmitters, and deficiency can affect mood, happiness, and motivation.
    • 4 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends consuming vitamin C to aid in NADPH recycling, which is necessary for glutathione to be reused after neutralizing oxidative stress.
    • 3 Oct 2026 · Zinc · neutral · YouTube ↗
      Mentions that more zinc could be beneficial for testosterone, but it's not working on the axis that most people need help with.
    • 29 Sep 2026 · Vitamin C · uses · YouTube ↗
      Takes Purity's liquid liposomal vitamin C for immune support and overall wellness, finding it easy to add to water, juice, or take straight up due to its good taste.
    • 18 Sep 2026 · Vitamin C · neutral · Facebook ↗
      Compares the Vitamin C content of oranges (53mg) to guava (228mg), noting guava has 4x more.
    • 18 Sep 2026 · Zinc · neutral · Facebook ↗
      Compares zinc content, noting salmon has under 1mg while oysters have 74mg per 100g, a 70x difference.
    • 18 Sep 2026 · Iron · neutral · Facebook ↗
      Compares iron content in spinach (2.7mg) and beef (2.6mg), but emphasizes that beef's heme iron absorbs at about 25%, while spinach's non-heme iron absorbs at 2-8%.
    • 18 Sep 2026 · Calcium · neutral · Facebook ↗
      Notes that milk contains 120mg of calcium, while sardines contain 351mg, highlighting a 3x difference.
    • 6 Sep 2026 · Zinc · recommends · Instagram ↗
      Recommends keeping zinc levels topped off because it is a critical cofactor for over 300 enzymes and is important for immune cells, testosterone, and wound healing.
    • 2 Sep 2026 · Zinc · recommends · YouTube ↗
      Recommends 15 mg of supplemental zinc if oysters are not realistic, but emphasizes that food source zinc is better as it comes with natural cofactors like copper and selenium.
  • Ben Greenfield · Niacin · neutral
    • 29 Aug 2026 · neutral · YouTube ↗
      States that Nrf2 activators, when combined with something like niacin, may have a good effect on plaque progression.
    • 29 Oct 2026 · Zinc · warns · YouTube ↗
      Ben Greenfield's formulation includes 30 grams of zinc a day, taken for one week before surgery and two weeks after, as it is an important cofactor for wound healing.
    • 29 Oct 2026 · Vitamin C · recommends · YouTube ↗
      States that vitamin C is extremely important for collagen turnover and cites orthopedic data showing that 500 mg to 1 g of vitamin C can reduce the rate of complex regional pain in total knee replacements and wrist fractures.
    • 15 Oct 2026 · Vitamin C · recommends · Podcast ↗
      Mentions vitamin C as part of a bare-minimum protocol.
    • 10 Oct 2026 · Zinc · recommends · YouTube ↗
      Emphasizes that zinc sufficiency is crucial for immunity because the thymus-derived peptide thymulin, which trains lymphocytes, requires zinc to be active.
    • 24 Sep 2026 · Vitamin C · neutral · YouTube ↗
      Notes that while vitamin C has significant value, the optimal dose is a vexed question, and high doses might not always be beneficial, potentially blunting the hormetic effects of exercise.
    • 19 Sep 2026 · Zinc · recommends · YouTube ↗
      Recommends adding zinc into one's stack because it is a co-factor for enzymes involved in testosterone synthesis and sperm maturation, and zinc deficiency is a reproducible cause of low sperm count.
    • 19 Sep 2026 · Zinc · neutral · Podcast ↗
      He mentions zinc as a supplement with real human data behind it for male fertility.
    • 8 Sep 2026 · Zinc · neutral · X ↗
      Zinc may support both testosterone and sperm count.
    • 25 Aug 2026 · Vitamin C · neutral · X ↗
      Notes that IV vitamin C has been used for decades for cancer patients with almost no standardization and that he receives many questions about its effectiveness and combination with chemo.
    • 15 Aug 2026 · Zinc · warns · YouTube ↗
      Warns that he was taking so much zinc without realizing it because it was in five different things he was taking, and he couldn't pinpoint the problem.
    • 9 Jul 2026 · Zinc · recommends · YouTube ↗
      Recommends supplementing with zinc if deficient, as multiple trials show significant symptom reduction of tinnitus in zinc-deficient individuals.
    • 9 Jul 2026 · Vitamin C · recommends · YouTube ↗
      Recommends Vitamin C for skin repair post-tattoo.
    • 9 Jul 2026 · Iron · recommends · YouTube ↗
      Recommends testing for and replenishing iron if levels are low, as it can affect the ability to maintain or preserve muscle, especially for those on GLP-1s.
  • Dave Asprey · Niacin · recommends
    • 25 Jul 2026 · recommends · YouTube ↗
      Recommends niacin, a form of vitamin B3, as one of the two most important raw materials for NAD+ production, found in foods like beef liver, chicken, turkey, and fish, or from supplements.
    • 24 Oct 2026 · Vitamin C · recommends · Facebook ↗
      Recommends taking vitamin C for better skin health.
    • 7 Oct 2026 · Vitamin C · uses · YouTube ↗
      States that currently, he is only taking vitamin C and vitamin D.
    • 7 Oct 2026 · Zinc · uses · YouTube ↗
      Developed a nonnano zinc sunscreen over five years, stating her skin is probably better now than it's ever been.
    • 3 Sep 2026 · Zinc · recommends · YouTube ↗
      Emphasizes the importance of having enough zinc before trying advanced longevity strategies like peptides.
    • 1 Sep 2026 · Zinc · recommends · YouTube ↗
      Suggests that zinc has better safety and protective data than meds for reducing cardio respiratory risk.
    • 14 Aug 2026 · Vitamin C · neutral · Podcast ↗
      Dave Asprey reflects on how new research clarifies the mechanism behind IV vitamin C's anti-cancer effect, vindicating a decades-old idea that was dismissed for the wrong reasons.
    • 25 Jul 2026 · Vitamin C · neutral · Facebook ↗
      Notes that plain Vitamin C isn't enough and that most people never think to check for a specific ingredient that makes it work.
    • 16 Jul 2026 · Vitamin C · warns · YouTube ↗
      Dave Asprey recommends taking maybe a gram of vitamin C a day in divided doses, noting that plasma levels peak around 250 milligrams twice a day.
    • 14 Jul 2026 · Vitamin C · recommends · YouTube ↗
      Recommends Qualia Vitamin C Plus, highlighting its combination of seven forms of vitamin C with 250 mg of citrus bioflavonoids, which helps with absorption and use for building collagen and a strong immune system.
    • 9 Jul 2026 · Vitamin C · warns · YouTube ↗
      Warns that taking too much vitamin C can raise oxalate levels, emphasizing that everything has risk and reward.
    • 24 Jun 2026 · Iron · warns · X ↗
      Warns that if a doctor diagnoses anemia, one should not assume they just need more iron, as low hemoglobin doesn't always mean low iron and the issue can sometimes be how well the body is using iron.
    • 16 Jun 2026 · Iron · neutral · Facebook ↗
      Notes that when energy intake is too low for training demand, nutrient intake often falls short, especially for iron, which is associated with impaired recovery.
    • 16 Jun 2026 · Calcium · neutral · Facebook ↗
      Notes that when energy intake is too low for training demand, nutrient intake often falls short, especially for calcium, which is associated with reduced bone health.
  • Siim Land · Niacin · recommends
    • 15 Feb 2026 · recommends · TikTok ↗
      Suggests that in the mornings, NAD supplements like niacinamide can help kickstart the circadian rhythm.
    • 29 Oct 2026 · Vitamin C · recommends · Instagram ↗
      Recommends taking vitamin C with collagen to support joint collagen synthesis.
    • 14 Oct 2026 · Vitamin C · neutral · Instagram ↗
      States that vitamin C is needed for initiating collagen synthesis and that higher vitamin C intake appears to increase vitamin C content in the skin.
    • 14 Oct 2026 · Iron · neutral · Instagram ↗
      Mentions that iron is a mineral necessary for making collagen.
    • 30 Sep 2026 · Vitamin C · neutral · X ↗
      Lists sauerkraut and fruit as sources of Vitamin C.
    • 30 Sep 2026 · Calcium · neutral · X ↗
      Lists dairy and sardines as sources of Calcium.
    • 6 Sep 2026 · Vitamin C · neutral · X ↗
      Notes that Vitamin C is one of several supplements with human evidence.
    • 3 Sep 2026 · Iron · warns · YouTube ↗
      States that excess iron promotes oxidative stress and inflammation, which increases heart disease risk.
    • 14 Aug 2026 · Calcium · neutral · X ↗
      Notes that Boron reduces calcium/magnesium loss.
    • 5 Aug 2026 · Zinc · recommends · YouTube ↗
      States that deficiencies in nutrients such as zinc can impair normal immune regulation.
    • 27 Jul 2026 · Vitamin C · neutral · X ↗
      Notes that researchers found vitamin C alleviates ferro-aging, a process of iron overload and lipid peroxidation that drives aging, and that it directly inhibited ACSL4, a protein driving ferro-aging.
    • 27 Jul 2026 · Vitamin C · neutral · X ↗
      States that Vitamin C has a central role in aging and longevity, and that in monkeys, oral vitamin C slowed ovarian aging during a 3.3-year study.
    • 27 Jul 2026 · Vitamin C · recommends · YouTube ↗
      States that vitamin C is one of the most important vitamins for staying healthy and aging well, and that intakes of 200 to 400 mg a day from food or supplements largely saturates plasma and neutrophils in most healthy adults. He also recommends spreading out the vitamin C across the day to avoid oversaturation.
    • 9 Jul 2026 · Vitamin C · neutral · YouTube ↗
      Mentions vitamin C in comparison to topical melatonin for oxidative defense, stating that melatonin would compete but is not as broadly validated clinically.
  • Peter Attia · Niacin · uses
    • 29 Jun 2025 · uses · YouTube ↗
      Peter Attia's AVIA Skincare vitamin C serum also contains niacinamide, which is useful to apply to the skin right after washing.
    • 4 Jan 2026 · Zinc · recommends · YouTube ↗
      Suggests that zinc and magnesium could potentially help with vasodilation and sleep, particularly for women experiencing severe symptoms in the luteal phase.
    • 9 Jul 2025 · Calcium · recommends · YouTube ↗
      Recommends calcium as one of the 'big three' micronutrients for bone health, suggesting a daily intake of 1,000 to 1,200 milligrams, which can be supplemented with calcium carbonate or calcium citrate.
    • 6 Jul 2025 · Calcium · neutral · YouTube ↗
      Explains that bone is 50 to 70% mineral, predominantly calcium, and that virtually all of the body's calcium is contained within bone, making bone important for calcium homeostasis.
    • 3 Jul 2025 · Vitamin C · stopped · YouTube ↗
      Recommends vitamin C as an important molecule for skin, noting its role as a precursor for collagen synthesis, a powerful antioxidant, and a regulator of complexion for even skin tone.
    • 29 Jun 2025 · Vitamin C · stopped · YouTube ↗
      Tried a vitamin C serum mixed with ferulic acid but stopped using it because she hated the smell. She notes that topical application of vitamin C far exceeds the levels achievable by ingestion for skin benefits.
    • 8 Jun 2025 · Iron · recommends · YouTube ↗
      Recommends iron supplements for women of reproductive age who are iron deficient.
    • 11 May 2025 · Biotin · warns · YouTube ↗
      Warns that biotin, found in many supplements, can completely obscure findings and render a non-LCMS test for estradiol and testosterone irrelevant due to interference with ELISA-based assays.
    • 22 Oct 2024 · Calcium · recommends · YouTube ↗
      Recommends calcium for bone health, stating that teenagers probably need about 1000 milligrams a day.
    • 21 Oct 2024 · Calcium · recommends · YouTube ↗
      Discusses bone acting as a reservoir for calcium and how resorption and formation release calcium into the blood when needed.
    • 9 Sep 2024 · Iron · neutral · YouTube ↗
      Notes that deficiencies in certain vitamins and minerals, such as iron, can be a cause of hair loss in women.
    • 6 Sep 2024 · Zinc · neutral · YouTube ↗
      Discusses the AREDS formula, which initially included C and beta-carotene with zinc and copper, and later replaced beta-carotene with lutein and zeaxanthin, showing it could delay or reduce the conversion of mild to severe macular degeneration.
    • 6 Sep 2024 · Vitamin C · neutral · YouTube ↗
      States that vitamin C deficiency is associated with an elevated risk of cataract, but supplementation to supranormal levels has not been shown to protect against cataract formation.
    • 19 Aug 2024 · Vitamin C · recommends · YouTube ↗
      Mentions the elimination of scurvy through the work of James Lind and the eventual understanding that it was due to vitamin C, initially thought to be just citrus.
  • Andrew Huberman · Niacin · neutral
    • 1 Jul 2024 · neutral · Instagram ↗
      Reviews data on ingesting or topically applying niacinamide to improve skin's youthfulness and appearance, including reducing wrinkles, sagging, and pore size.
    • 29 Oct 2026 · Zinc · uses · YouTube ↗
      Zinc carnosine to support and improve the lining of your gut.
    • 26 Oct 2026 · Zinc · uses · YouTube ↗
      Notes that AG1 Pro contains zinc carnosine to support and improve the lining of the gut.
    • 19 Oct 2026 · Zinc · recommends · YouTube ↗
      States that AG1 Pro contains zinc carnosine to support and improve the lining of the gut.
    • 12 Oct 2026 · Zinc · uses · YouTube ↗
      Uses AG1 Pro, which contains zinc carnosine to support and improve the lining of the gut.
    • 28 Sep 2026 · Zinc · uses · YouTube ↗
      States that AG1 Pro contains zinc carnosine to support and improve the lining of the gut, and he was already taking some of these ingredients separately.
    • 21 Sep 2026 · Zinc · uses · YouTube ↗
      States that AG1 Pro includes zinc carnosine, which he was already taking separately, to support and improve the lining of the gut.
    • 14 Sep 2026 · Zinc · uses · YouTube ↗
      Personally takes zinc carnosine, which is included in AG1 Pro to support and improve the lining of the gut.
    • 31 Aug 2026 · Zinc · uses · YouTube ↗
      AG1 Pro has zinc carnosine to support and improve the lining of your gut. Some of these ingredients I personally was already taking separate from the AG1 formula.
    • 24 Aug 2026 · Zinc · recommends · YouTube ↗
      States that AG1 Pro contains zinc carnosine to support and improve the lining of your gut.
    • 17 Aug 2026 · Zinc · uses · YouTube ↗
      Uses AG1 Pro, which contains zinc carnosine to support and improve the lining of the gut.
    • 20 Jul 2026 · Iron · recommends · YouTube ↗
      States that Iron is one of the critical nutrients with the best evidence for cognitive function and reducing the risk of dementia.
    • 17 Jun 2026 · Vitamin C · uses · X ↗
      Takes a multivitamin every day for longevity.
    • 13 Apr 2026 · Biotin · neutral · Podcast ↗
      Mentions biotin.
  • Dr. Rhonda Patrick · Niacin · neutral
    • 28 Jan 2020 · neutral · YouTube ↗
      States that NAD can be synthesized from the three forms of niacin, also known as vitamin B3, found in foods like lean meats, legumes, and veggies.
    • 29 Sep 2026 · Zinc · recommends · YouTube ↗
      Notes that not getting enough zinc can affect testosterone, as zinc is very important for testosterone synthesis.
    • 28 Sep 2026 · Zinc · recommends · YouTube ↗
      Recommends men take a 30 milligram zinc supplement for sperm health when preparing for IVF.
    • 25 Aug 2026 · Vitamin C · neutral · Facebook ↗
      Lutein and zeaxanthin can also be obtained from certain multivitamins.
    • 21 Aug 2026 · Zinc · neutral · Instagram ↗
      Discusses findings from a meta-analysis on zinc supplementation, noting it improved insulin resistance, inflammation, and oxidative stress in people with diabetes or prediabetes, and explains its biological role in the pancreas.
    • 29 Jun 2026 · Calcium · neutral · Facebook ↗
      Mentions that kale delivers calcium, a micronutrient many diets fall short on.
    • 5 Jun 2026 · Zinc · recommends · Instagram ↗
      Recommends nutrients like zinc for men to prioritize sperm mitochondrial health.
    • 5 Jun 2026 · Vitamin C · recommends · Instagram ↗
      Recommends nutrients like vitamin C for men to prioritize sperm mitochondrial health.
    • 4 May 2026 · Vitamin C · uses · YouTube ↗
      Dr. Rhonda Patrick's daughter chugs an Emergency fizzy drink in the morning to ensure she gets some vitamin C and micronutrients before school.
    • 4 May 2026 · Iron · uses · YouTube ↗
      Recently found out he needed to get on an iron supplement and noticed he gets less sore in his training after taking it.
    • 5 Feb 2026 · Vitamin C · recommends · Facebook ↗
      Choosing a multivitamin that includes lutein and zeaxanthin ensures you get meaningful amounts every day.
    • 22 Jan 2026 · Iron · recommends · YouTube ↗
      Advises that menstruating women should ensure they are getting enough iron.
    • 9 Jan 2026 · Vitamin C · neutral · Facebook ↗
      Notes that ~35% of Americans are low in vitamin C.
    • 9 Jan 2026 · Calcium · neutral · Facebook ↗
      Notes additional gaps in calcium.
  • Bryan Johnson · Niacin · recommends
    • Date not recorded · recommends · Website ↗
      Recommends Niacinamide as a supplement for skin health, noting it is in the Blueprint stack.
    • 8 Jul 2026 · Iron · stopped · YouTube ↗
      Has had low iron for 11 years and despite eating meat and trying all forms of iron supplementation at different times and sequences, none of it worked to raise his iron or ferritin levels.
    • 7 Jul 2026 · Iron · uses · X ↗
      Had low iron for 11 years, with ferritin averaging 38 ng/mL, and has finally boosted it back to healthy levels.
    • 4 May 2026 · Zinc · uses · X ↗
      Takes 15 mg of Zinc in the morning for longevity.
    • 14 Apr 2026 · Zinc · uses · X ↗
      Takes 15 mg of Zinc in the morning.
    • 2 Apr 2026 · Zinc · uses · X ↗
      Takes 15 mg of Zinc in the morning for longevity.
    • 5 Jun 2025 · Calcium · recommends · YouTube ↗
      Recommends calcium as a mineral that, along with phosphorus, magnesium, and boron, is deposited to fortify the bone structure after the collagen scaffold is in place.
    • 12 May 2025 · Calcium · recommends · YouTube ↗
      Agrees that a little extra calcium is probably okay, especially for women, to really hit home for bone mineral density.
    • 3 Feb 2025 · Vitamin C · neutral · YouTube ↗
      Uses Vitamin C as an example of how it would be great if people knew that when they took it, it had a measurable amount and wasn't polluted, which is what Brian ensures with his products.
    • 8 Jan 2025 · Vitamin C · uses · YouTube ↗
      Applies vitamin C after showering.
    • 5 Sep 2024 · Biotin · neutral · YouTube ↗
      Mentions biotin as an example of an ingredient that AG1 lists with a specific dose, but then contrasts it with other ingredients in proprietary blends where doses are not disclosed.
    • 16 Dec 2023 · Zinc · uses · YouTube ↗
      Bryan Johnson's baseline measurements showed low zinc, which was easy to fix by adjusting her protocol and supplements.
    • 26 Sep 2023 · Iron · uses · YouTube ↗
      Takes 10 milligrams of heme iron to get his iron levels up, as they are borderline.
    • 26 Sep 2023 · Vitamin C · uses · YouTube ↗
      Takes 250 milligrams of Vitamin C.

RAL Summary

Members OnlyTier 2 for Hair Growth

Tier 2 because two controlled trials of niacin showed clear improvement, the largest with 60 women showing fuller hair than placebo [1], and 80 percent of 37,634 reviews are positive. Most other ingredients are below studied doses or have weak or mixed evidence.

Where the evidence disagrees: 15 of the 55 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Skin, hair and nails, Blood

Combine with: To further enhance hair health and growth, consider combining Viviscal with supplements like marine collagen peptides to provide additional building blocks for hair structure. Omega-3 fatty acids can support scalp health and reduce inflammation, which is beneficial for hair follicles. Additionally, a high-quality silica supplement, often derived from horsetail extract, can strengthen hair strands and improve elasticity. Zinc is another essential mineral for hair tissue growth and repair, and a Vitamin D supplement may be beneficial, as low levels have been linked to hair loss.

Possible side effects: No major side effects reported.

Supplement Facts

Vitamin C Powder and Ascorbic Acid) 59 mg · Niacin 12 mg NE · Biotin 120 mcg
Supplement Facts
Serving Size 1 tablet
Servings Per Container 60
Amount Per Serving% Daily Value
Vitamin C (from Acerola (fruit) Powder and Ascorbic Acid)59 mg65%
Niacin (as Niacinamide)12 mg NE75%
Biotin120 mcg400%
Calcium60 mg5%
Iron (from Ferrous Fumarate)10 mg56%
Zinc (from Zinc Oxide)11 mg100%
AminoMar Marine Complex (collagen Type II and Oyster Extract Powder)450 mg†
Horsetail Extract (leaf & stem)36.7 mg†
Millet Seed Extract7.5 mg†
† Daily Value not established.

Directions: Take 1 tablet twice daily for 3 to 6 months. Best taken with water after a meal. Do not exceed the recommended daily intake.

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Graded October 24, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.