Nutrafol Women Hair Growth Nutraceutical Review

Nutrafol Women Hair Growth Nutraceutical is a capsule supplement. A serving is 4 capsules, and each container holds 30 servings. The label lists per serving: Vitamin A 1500 mcg RAE, Vitamin C 100 mg, Vitamin D 62.5 mcg, Vitamin E 2.6 mg, Biotin 2500 mcg, Calcium 60 mg, Iodine 225 mcg, Zinc 20 mg and Selenium 200 mcg. It also lists Synergen Complex Plus at 1.96 g and Nutrafol Blend at 480 mg. A serving has 10 calories, 2 g total carbohydrate, 1 g protein, 5 mg sodium and 35 mg potassium. The other ingredients are vegetable capsule (hypromellose), maltodextrin, tricalcium phosphate, silicon dioxide, organic rice hulls and pea starch. No directions are printed in the label details. Buyers most often mention changes in their hair, such as thicker hair and less shedding, and some say they dislike the taste. Others mention delivery delays and the price.

Product Focus: Hair GrowthAlso covers:SkinHormonesImmune system
Tier ⓘ
Tier 2 · Rank 4
Tier 2 · Researched. Human studies show improvement in an aging-related function or a specific goal, and the reviews agree. Rank 4 within Tier 2 for Hair Growth; 4 of 63 overall. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
80 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
80% of 21,586
Biohacker Mentions
8 of 10
Cost per month
$18

Study, Trial or Testing Result Summary

Members Only96 human studies · 46 improved

2 of these 96 human studies gave the ingredient by injection, not by mouth.

96 human studies46 improved42 no effect875,930 people studied

The main support for this product comes from studies of its own branded blends. A pooled analysis of 19 trials with 1,658 people with pattern hair loss found the Nutrafol plant extracts increased hair density compared with placebo [1]. Another pooled analysis found about 7 more thick hairs per square centimeter in women at 24 weeks [2]. In 70 women around menopause, six months of use raised hair counts and cut shedding by 32% [3]. In 40 women with thinning hair, the Synergen Complex supplement gave more hairs than placebo at three and six months, with no side effects reported [4]. A third pooled analysis found more growing-phase hair, though total hair count did not differ [5]. Biotin is at a full dose; a trial in 105 adults found a lower daily amount reduced hair fall [6]. Selenium is at a full dose and reduced hair loss in 64 women with polycystic ovary syndrome [7], but too much selenium causes hair loss, with an adult upper limit of 255 micrograms a day. Zinc reaches a full dose at two servings a day [8]. Vitamin A, vitamin E and calcium are below the doses studied. High-dose vitamin A has been linked to hair loss [9]. Animal and cell studies are never counted.

See all 96 studies →Hide the studies

Review Totals and Summary

Members Only21,586 reviews · 80% positive
21,586 reviews · Amazon 21,096 · Walmart 490
80% positive8% neutral12% negative

Nutrafol Women Hair Growth Nutraceutical carries about 21586 ratings across the stores that sell it, and 64% of the starred reviews give 4 or 5 stars. Buyers who like it talk about changes in their hair, while the low scores come mostly from delivery problems and from one buyer who saw no change. **What buyers say it did for them:** Several buyers report changes in their hair. One says they saw "thicker hair and less shedding at 2 months" even though the product says to allow three to six months. Another writes "my hair is starting come back" after the first bottle. A third reports that hair and nails are growing after one week. One buyer calls it an "Amazing product which really works to grow hair as advertised," and another says it helped their thinning hair. **What they complain about:** Some of the complaints are about the store, not the capsules. One buyer says items shipped by the store were delayed, arriving days after the promised date. Another says "Never received it. Need a refund." One buyer says it "doesn't work as advertised." Others give middle ratings because they have used it for only a month and cannot judge yet, with one planning to review again after a couple of months. **Taste, smell, pill size or form:** Only taste comes up. One buyer says "i dont like the taste but i love the results." The reviews say nothing about smell or pill size. **Value for money:** Price gave at least one buyer pause. They were "hesitant to buy these because of the price point" but ended up calling it "Worth every penny!!!" No other buyer comments on cost. **Who it seems to suit and who it did not:** The happiest buyers are people dealing with thinning hair or shedding, and those who kept going for a couple of months or a full bottle. One buyer who lives in a dry place and notices breakage is a month in and says "I have hope that it's working," so they keep buying. The buyer who found it did not work as advertised is the clearest case of it not suiting someone. Buyers only a month in say it is too early to tell.

Biohacker Summary

Members Only8 of 10 recommend it
8 of 10 biohackers on our panel recommend it

This product has no single main ingredient on the panel's record, so the group's comments are spread across several smaller ingredients in this product, with vitamin D drawing the most attention. Vitamin D came up for most of the panel: several recommend it or take it, one takes 5000 IU of D3 in the morning for general health and longevity, and others advise taking it with dietary fat for better absorption or aiming for higher blood levels for healing. Zinc was mentioned by most of them as well, with one taking 15 mg in the morning for longevity, another using a high daily dose around surgery and flagging it with a warning, and others linking it to gut lining, wound repair and sleep. Vitamin C was recommended by three of them, usually paired with collagen before a workout or for joint and skin support, while potassium was favored mainly from foods or electrolyte drinks, and one panelist warned about taking high levels of iodine and another said extra biotin is often unnecessary.

See all 10 biohackers →Hide the biohackers
  • Dr. Eric Berg · Selenium · neutral
    • 8 Nov 2026 · neutral · Facebook ↗
      Notes that sardines are rich in selenium, which binds with mercury.
    • 8 Nov 2026 · Vitamin D · neutral · Facebook ↗
      Lists Vitamin D as an ingredient found in sardines.
    • 8 Nov 2026 · Calcium · neutral · Facebook ↗
      States that one can of sardines contains 382 mg of calcium.
    • 8 Nov 2026 · Iodine · recommends · Facebook ↗
      Recommends using povidone-iodine daily with a small bandage for skin tags and warts, stating it may help deactivate the virus behind these growths.
    • 8 Nov 2026 · Vitamin A · neutral · Facebook ↗
      Mentions that the body relies on healthy fats to absorb essential vitamins like A, D, E, and K, which help support skin health, moisture, and normal cell function.
    • 7 Nov 2026 · recommends · Facebook ↗
      Recommends selenium as a trace mineral, noting that modern farming practices deplete it from the soil, leading to low levels in crops.
    • 7 Nov 2026 · Vitamin D · recommends · Facebook ↗
      Recommends Vitamin D3 because it's nearly impossible to get enough from food and most people don't get enough sun, advising to aim for blood levels of at least 50 to 80 ng/mL.
    • 7 Nov 2026 · Vitamin D · neutral · Instagram ↗
      Dr. Berg states that when nutrients like vitamin D are too low, fatigue and weakness can follow.
    • 7 Nov 2026 · Calcium · warns · Facebook ↗
      Warns against calcium supplements, citing studies that link them to a higher risk of heart attack, especially in postmenopausal women, and suggests getting calcium from dairy instead.
    • 7 Nov 2026 · Iodine · recommends · Facebook ↗
      Recommends iodine as a trace mineral, noting that modern farming practices deplete it from the soil, leading to low levels in crops.
    • 7 Nov 2026 · Iodine · recommends · Instagram ↗
      Dr. Eric Berg states that 80% of the body's iodine is concentrated in the thyroid, but other tissues like breast tissue, reproductive organs, and stomach also rely on iodine to function properly, emphasizing the importance of getting enough iodine even with a normally functioning thyroid.
    • 7 Nov 2026 · Iodine · uses · YouTube ↗
      Introduces his new product, Plant-based Iodine Icelandic Sea Kelp, which he uses and recommends taking one vegetable capsule delivering 200 micrograms of plant-based iodine in the morning.
    • 7 Nov 2026 · Vitamin A · warns · Facebook ↗
      Warns against generic multivitamins, stating they are often full of fillers and synthetics.
    • 7 Nov 2026 · Vitamin E · warns · Facebook ↗
      Warns against generic multivitamins, stating they are often full of fillers and synthetics.
  • Dr. Rhonda Patrick · Vitamin D · neutral
    • 8 Nov 2026 · neutral · Instagram ↗
      Notes that vitamin D from sunlight, food, or supplements needs to undergo conversions in the liver and kidneys to become its active hormone form, calcitriol.
    • 6 Nov 2026 · Zinc · neutral · Instagram ↗
      Mentions that getting too little zinc may play a role in declining testosterone levels, and that zinc helps the body make testosterone.
    • 4 Nov 2026 · neutral · Instagram ↗
      States that Vitamin D supplementation has been associated with a 40% lower dementia risk, and low levels are linked to a 50 to 80% higher risk.
    • 28 Oct 2026 · recommends · YouTube ↗
      Recommends getting adequate vitamin D, noting that people taking vitamin D supplements have a 40% lower risk of dementia, while those with lower vitamin D have a 50-80% higher risk.
    • 5 Oct 2026 · neutral · Facebook ↗
      Vitamin D supplementation was linked to a 40% lower risk of dementia in an observational study of more than 12,000 older adults.
    • 30 Sep 2026 · recommends · YouTube ↗
      Mentions that vitamin D also plays a role in maintaining muscle mass.
    • 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 · recommends · YouTube ↗
      Recommends ensuring adequate vitamin D intake for men's sperm health.
    • 28 Sep 2026 · Zinc · recommends · YouTube ↗
      Recommends men take a 30 milligram zinc supplement for sperm health when preparing for IVF.
    • 24 Sep 2026 · neutral · Facebook ↗
      Vitamin D and strength training alone did not, but adding them strengthened the effect on one clock, with the full combination slowing that measure by ~3.8 months.
    • 25 Aug 2026 · neutral · Facebook ↗
      Lutein and zeaxanthin can also be obtained from certain multivitamins.
    • 25 Aug 2026 · Vitamin E · neutral · Facebook ↗
      Lutein and zeaxanthin can also be obtained from certain multivitamins.
    • 25 Aug 2026 · Vitamin C · neutral · Facebook ↗
      Lutein and zeaxanthin can also be obtained from certain multivitamins.
    • 25 Aug 2026 · Vitamin A · neutral · Facebook ↗
      Lutein and zeaxanthin can also be obtained from certain multivitamins.
  • Thomas DeLauer · Vitamin C · recommends
    • 6 Nov 2026 · recommends · YouTube ↗
      Recommends whole food vitamin C, found in kiwi fruit, citrus, and bell peppers, to help clear uric acid by competing at kidney transporters, preventing reabsorption.
    • 5 Nov 2026 · Vitamin D · recommends · YouTube ↗
      Recommends taking Vitamin D3 in the morning, between 6:00 and 10:00 a.m., to align with the body's natural metabolic activation phase and sunlight-triggered vitamin D production.
    • 2 Nov 2026 · Potassium · recommends · YouTube ↗
      Recommends Element electrolytes, noting they are focused on sodium first, then potassium, then magnesium, helping with sending signals and hydrating tissue.
    • 28 Oct 2026 · Potassium · uses · YouTube ↗
      Uses Element's cans which contain 100 milligram potassium, finding that electrolytes help his workout performance.
    • 26 Oct 2026 · recommends · YouTube ↗
      Recommends taking vitamin C along with collagen about an hour before a workout for connective tissue benefits.
    • 24 Oct 2026 · Potassium · uses · YouTube ↗
      Uses Element's 100 mg potassium cans first thing in the morning to prime his day and help with workout performance.
    • 23 Oct 2026 · 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 · Vitamin D · uses · YouTube ↗
      Uses vitamin D3 in the fall and winter months when getting less sun, as it's important to supplement it then.
    • 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.
    • 20 Oct 2026 · Vitamin D · recommends · YouTube ↗
      Recommends taking a massive amount of vitamin D simultaneously with an early morning massive breakfast to help reset circadian rhythms and address hyperphagia.
    • 8 Oct 2026 · Vitamin D · recommends · Facebook ↗
      Recommends Vitamin D, stating that it has receptors throughout the brain and deficiency can quickly impact brain and mood.
    • 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.
    • 6 Oct 2026 · Vitamin D · uses · YouTube ↗
      Takes supplemental vitamin D because he is skin sensitive and from northern latitudes, limiting his UV exposure.
    • 5 Oct 2026 · Vitamin D · recommends · YouTube ↗
      Recommends taking vitamin D on non-liver days to ensure both nutrients get proper receptor access.
  • Andrew Huberman · Zinc · neutral
    • 5 Nov 2026 · neutral · YouTube ↗
      Notes that AG1 Pro contains zinc carnosine to support and improve the lining of the gut.
    • 29 Oct 2026 · uses · YouTube ↗
      Zinc carnosine to support and improve the lining of your gut.
    • 26 Oct 2026 · uses · YouTube ↗
      Notes that AG1 Pro contains zinc carnosine to support and improve the lining of the gut.
    • 19 Oct 2026 · recommends · YouTube ↗
      States that AG1 Pro contains zinc carnosine to support and improve the lining of the gut.
    • 12 Oct 2026 · uses · YouTube ↗
      Uses AG1 Pro, which contains zinc carnosine to support and improve the lining of the gut.
    • 28 Sep 2026 · 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 · uses · YouTube ↗
      States that AG1 Pro includes zinc carnosine, which he was already taking separately, to support and improve the lining of the gut.
    • 21 Sep 2026 · Vitamin D · neutral · YouTube ↗
      Notes that most people are probably deficient in vitamin D and benefit from supplementing, but there's no point in doing it unless you're deficient for most things.
    • 14 Sep 2026 · uses · YouTube ↗
      Personally takes zinc carnosine, which is included in AG1 Pro to support and improve the lining of the gut.
    • 31 Aug 2026 · 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 · recommends · YouTube ↗
      States that AG1 Pro contains zinc carnosine to support and improve the lining of your gut.
    • 7 Aug 2026 · Vitamin D · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning for longevity.
    • 27 Jul 2026 · Potassium · uses · YouTube ↗
      Uses Element, an electrolyte drink with sodium, magnesium, and potassium in correct ratios and no sugar, to ensure adequate hydration and electrolytes, especially when starting days fast or during physical exercise.
    • 20 Jul 2026 · Vitamin D · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning for general health.
  • Dr. Mark Hyman · Vitamin D · uses
    • 4 Nov 2026 · uses · YouTube ↗
      Consumes Zetopia's Atlantic salmon to get Vitamin D, particularly in the winter months, as it is one of the few foods that provides both Omega-3s and Vitamin D.
    • 29 Oct 2026 · neutral · YouTube ↗
      Mentions that the body makes vitamin D from sunlight exposure, and a deficiency can hinder calcium absorption, which is crucial for strong bones.
    • 29 Oct 2026 · Zinc · neutral · YouTube ↗
      Explains that zinc is important for the body's repair crew, helping to heal damaged tissue, and a deficiency can lead to cuts and wounds taking longer to heal.
    • 26 Oct 2026 · recommends · Facebook ↗
      Recommends Vitamin D for health, stating that amazing things happen when patients' vitamin D statuses reach optimal levels.
    • 21 Oct 2026 · neutral · YouTube ↗
      Mentions vitamin D as an existing biomarker that plays a role in mental health, which Function Health includes in their measurements.
    • 19 Oct 2026 · neutral · YouTube ↗
      Notes that vitamin D plays a role in immune function.
    • 19 Oct 2026 · Vitamin A · neutral · YouTube ↗
      Mentions that vitamin A levels can be looked at to get a deep sense of what's happening with nutrient levels.
    • 16 Oct 2026 · Potassium · warns · Facebook ↗
      Warns that potassium bromate, a dough conditioner banned in the EU, UK, and Canada, is still allowed in U.S. bread.
    • 12 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends vitamin C as a basic supplement during detoxification to help with inflammation and detoxification.
    • 8 Oct 2026 · recommends · Instagram ↗
      Recommends checking vitamin D levels and states that if they had to pick one single intervention for immune health, vitamin D would be it.
    • 7 Oct 2026 · neutral · Podcast ↗
      Dr. Hyman discusses vitamin D in relation to sun exposure patterns.
    • 7 Oct 2026 · recommends · YouTube ↗
      States that vitamin D supplementation can help with oxidative stress.
    • 7 Oct 2026 · Zinc · uses · YouTube ↗
      Gave a patient with psoriatic arthritis a little zinc, which contributed to significant improvement in her condition.
    • 7 Oct 2026 · Vitamin C · neutral · Podcast ↗
      Dr. Hyman mentions vitamin C as an advanced therapy for skin repair.
  • Dave Asprey · Biotin · warns
    • 3 Nov 2026 · warns · YouTube ↗
      Mentions that most places put in extra biotin for hair growth, suggesting it's not always necessary or beneficial.
    • 3 Nov 2026 · Potassium · recommends · YouTube ↗
      Explains that potassium helps open a gate, allowing creatine to slip through and cross the blood-brain barrier more effectively.
    • 3 Nov 2026 · Vitamin C · neutral · YouTube ↗
      Recounts a doctor telling him in his 20s that vitamin C would kill him.
    • 1 Nov 2026 · Vitamin D · uses · Facebook ↗
      Takes Vitamin DAKE from Suppgrade Labs.
    • 25 Oct 2026 · Vitamin D · recommends · Podcast ↗
      Suggests that vitamin D supports brain health, muscle function, and focus.
    • 24 Oct 2026 · Vitamin C · recommends · Facebook ↗
      Recommends taking vitamin C for better skin health.
    • 9 Oct 2026 · Vitamin D · recommends · Podcast ↗
      Host Dave Asprey explains why correcting a vitamin D deficiency still makes sense for male fertility, even though supplementation did not improve overall semen parameters in a randomized trial.
    • 7 Oct 2026 · Vitamin C · uses · YouTube ↗
      States that currently, he is only taking vitamin C and vitamin D.
    • 7 Oct 2026 · Vitamin D · uses · YouTube ↗
      States that currently, he is only taking vitamin C and vitamin D.
    • 7 Oct 2026 · Vitamin E · uses · YouTube ↗
      Dave Asprey's kids get a little bit of vitamin E every day, which helps to stabilize the bad oils they get when eating at restaurants.
    • 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.
    • 5 Sep 2026 · Vitamin D · recommends · YouTube ↗
      Recommends vitamin D, noting it's actually a hormone and that most people are deficient, even those who take it, because they don't take enough.
    • 3 Sep 2026 · Vitamin D · recommends · YouTube ↗
      States that most people on the spectrum are low in vitamin D and need more of it, mentioning his own product, Vitam DAKNE, which contains real vitamin A.
    • 3 Sep 2026 · Zinc · recommends · YouTube ↗
      Emphasizes the importance of having enough zinc before trying advanced longevity strategies like peptides.
  • Siim Land · Vitamin D · recommends
    • 31 Oct 2026 · recommends · YouTube ↗
      Advises against taking vitamin D in the morning with other supplements because it is fat soluble and requires dietary fat for better absorption.
    • 29 Oct 2026 · recommends · Instagram ↗
      Recommends taking Vitamin D with fat for better absorption.
    • 29 Oct 2026 · Vitamin C · recommends · Instagram ↗
      Recommends taking vitamin C with collagen to support joint collagen synthesis.
    • 24 Oct 2026 · neutral · Instagram ↗
      States that Vitamin D connects biology to light and that UVB reaching the skin enables its production.
    • 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.
    • 30 Sep 2026 · Vitamin C · neutral · X ↗
      Lists sauerkraut and fruit as sources of Vitamin C.
    • 30 Sep 2026 · Potassium · neutral · X ↗
      Lists potatoes and fruit as sources of Potassium.
    • 30 Sep 2026 · Calcium · neutral · X ↗
      Lists dairy and sardines as sources of Calcium.
    • 30 Sep 2026 · Vitamin A · neutral · X ↗
      Lists liver and carrots as sources of Vitamin A.
    • 6 Sep 2026 · recommends · Instagram ↗
      Thinks vitamin D has some of the strongest evidence and is worth considering.
    • 6 Sep 2026 · neutral · X ↗
      Notes that Vitamin K2 pairs well with vitamin D by regulating calcium and bone mineralization.
    • 6 Sep 2026 · Vitamin C · neutral · X ↗
      Notes that Vitamin C is one of several supplements with human evidence.
    • 26 Aug 2026 · recommends · Instagram ↗
      Recommends taking vitamin D supplements with some fat to maximize its absorption, suggesting with food or a teaspoon of olive oil.
    • 23 Aug 2026 · neutral · X ↗
      Notes that taking vitamin D3 with a fat-containing meal resulted in 32% higher peak blood vitamin D levels.
  • Ben Greenfield · Zinc · warns
    • 29 Oct 2026 · 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 E · neutral · YouTube ↗
      Mentions a recent study showing no significant increase in bleeding for patients on Vitamin E supplementation during open heart surgery, which was interesting for him to learn.
    • 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.
    • 29 Oct 2026 · Vitamin D · recommends · YouTube ↗
      Notes that Vitamin D is actually a hormone and recommends patients aim for levels around 40 to 50, or even 60 for fracture healing, for optimal healing, as opposed to just above 20 which is considered normal.
    • 22 Oct 2026 · Potassium · uses · YouTube ↗
      Says he is drinking LMNT, which contains sodium, potassium, and magnesium, and states that he actually drinks this stuff.
    • 21 Oct 2026 · Vitamin A · neutral · Instagram ↗
      Notes that Vitamin A is a fat-soluble vitamin that supports healthy skin cell turnover.
    • 15 Oct 2026 · Vitamin C · recommends · Podcast ↗
      Mentions vitamin C as part of a bare-minimum protocol.
    • 15 Oct 2026 · Vitamin D · recommends · Podcast ↗
      Mentions vitamin D as part of a bare-minimum protocol.
    • 15 Oct 2026 · Vitamin D · recommends · YouTube ↗
      Advises getting vitamin D levels between 60 and 100 nanograms per milliliter as a minimum step for overall health and to slow down heart disease.
    • 15 Oct 2026 · Iodine · recommends · YouTube ↗
      Recommends taking sufficient iodine to ensure free T3 levels are right, which is important for the reverse calcium transport system.
    • 15 Oct 2026 · Selenium · recommends · YouTube ↗
      Recommends taking sufficient selenium to ensure free T3 levels are right, which is important for the reverse calcium transport system.
    • 10 Oct 2026 · 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 · 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.
  • Bryan Johnson · Vitamin D · uses
    • 22 Oct 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning for general health.
    • 15 Aug 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning for general health.
    • 3 Jul 2026 · neutral · X ↗
      Mentions that the sunlight assessment claims low vitamin D levels cause the immune system to misfire, and notes that their vitamin D has been measured.
    • 4 May 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning for longevity.
    • 4 May 2026 · Zinc · uses · X ↗
      Takes 15 mg of Zinc in the morning for longevity.
    • 2 May 2026 · uses · X ↗
      He takes 5000 IU of Vitamin D3 in the morning for general health.
    • 21 Apr 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning for general health.
    • 15 Apr 2026 · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning for longevity.
    • 14 Apr 2026 · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning.
    • 14 Apr 2026 · Zinc · uses · X ↗
      Takes 15 mg of Zinc in the morning.
    • 8 Apr 2026 · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning.
    • 7 Apr 2026 · uses · X ↗
      He takes 5000 IU of Vitamin D3 in the morning for general health.
    • 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.
  • Peter Attia · Potassium · recommends
    • 6 Sep 2026 · recommends · YouTube ↗
      States there is some evidence that increasing dietary potassium through potassium-rich foods like bananas and potatoes, rather than supplements, can lower blood pressure.
    • 4 Jan 2026 · Vitamin D · uses · YouTube ↗
      Lists vitamin D as one of her staple supplements.
    • 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.
    • 17 Nov 2025 · Iodine · warns · Podcast ↗
      Discusses the dangers of supplementing with high levels of iodine.
    • 16 Nov 2025 · Vitamin D · neutral · YouTube ↗
      Notes that several studies show patients taking vitamin D can reduce TPO levels and prolong the honeymoon period of Hashimoto's disease.
    • 16 Nov 2025 · Iodine · warns · YouTube ↗
      Warns that high-dose iodine supplementation carries a risk of autoimmune thyroid disease, citing increased incidence in Japan due to higher dietary iodine intake.
    • 16 Nov 2025 · Selenium · neutral · YouTube ↗
      Notes that several studies show patients taking selenium can reduce TPO levels and prolong the honeymoon period of Hashimoto's disease.
    • 6 Aug 2025 · Vitamin D · neutral · YouTube ↗
      States that in mouse studies, there was a combined effect of alpha ketoglutarate with vitamin D for both sexes.
    • 6 Aug 2025 · Vitamin A · neutral · YouTube ↗
      Notes that in mouse studies, there was a combined effect of alpha ketoglutarate with vitamin A for male mice.
    • 3 Aug 2025 · Vitamin D · neutral · YouTube ↗
      Uses vitamin D as an example of how people might dismiss its efficacy due to failed clinical trials that didn't adjust the dose or measure levels.
    • 20 Jul 2025 · Vitamin D · neutral · YouTube ↗
      In mouse studies, Peter Attia's team found a combined effect of AKG with Vitamin D for both sexes.
    • 20 Jul 2025 · Vitamin A · neutral · YouTube ↗
      In mouse studies, Peter Attia's team found a combined effect of AKG with Vitamin A for male mice.
    • 10 Jul 2025 · Vitamin D · neutral · YouTube ↗
      Suggests that supplementing with lots of vitamin D might help overcome the negative effects of phenytoin on bone health by improving calcium absorption, though he is unaware of studies on this.
    • 9 Jul 2025 · Vitamin D · recommends · YouTube ↗
      Recommends Vitamin D3 as one of the 'big three' micronutrients for bone health, suggesting a daily intake of 800 to 1,000 IU, which can be obtained through sunlight or supplementation.

RAL Summary

Members OnlyTier 2 for Hair Growth

Tier 2 fits because several pooled analyses and placebo-controlled trials of the Nutrafol blend show more hair and less shedding [1][3]. About 80% of over 21,000 reviews are positive.

Where the evidence disagrees: 42 of the 96 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Skin and hair, Endocrine system, Immune system

Combine with: Copper is often paired with zinc, because the zinc in this product is a high amount and zinc intake draws down the body's copper. Pantothenic acid, also called vitamin B5, is often paired with biotin because the two share the same route into cells, so having both keeps that route from favoring one. Both pairings are made to keep a main ingredient from crowding out another nutrient.

Possible side effects: The trials of the blend reported no or rare mild side effects. High doses of vitamin A and selenium can cause hair loss, and one buyer disliked the taste.

Supplement Facts

Vitamin A 1500 mcg RAE · Vitamin C 100 mg · Vitamin D 62.5 mcg
Supplement Facts
Serving Size 4 Capsules
Servings Per Container 30
Amount Per Serving% Daily Value
Calories10
Total Carbohydrate2 g
Protein1 g
Vitamin A1,500 mcg RAE
Vitamin C100 mg
Vitamin D62.5 mcg
Vitamin E2.6 mg
Biotin2,500 mcg
Calcium60 mg
Iodine225 mcg
Zinc20 mg
Selenium200 mcg
Sodium5 mg
Potassium35 mg
Synergen Complex Plus1.96 g†
Nutrafol Blend480 mg†
† Daily Value not established.

Other ingredients: Vegetable Capsule (Hypromellose), Maltodextrin, Tricalcium Phosphate, Silicon Dioxide, Organic Rice Hulls, Pea Starch.

Label source: Reverseagelab · Report a label change

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The Nutrafol Women Hair Growth Nutraceutical label, 120 Capsules
Women Hair Growth Nutraceutical, 120 Capsules

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Our articles on this subject

Graded November 14, 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.