Brainchild Nutritionals ADHD Vitamin Support Review

ADHD Vitamin Support Formula is a great starting liquid multivitamin formula used by a large majority of the children taking our supplements. It is designed to provide a moderate level of nutritional support for children and adults with less-active form of vitamin B6, for those who do better on this form. Pack size: (16 fl oz) 473ml. Allergen information: Dairy Free, Egg Free, Wheat Free, Yeast Free. Storage: Store in a cool, dark place out of reach of children. Disclaimer: Food supplements should not be used as a substitute for a varied diet. If you are taking prescribed medication, have any medical condition, or are pregnant or breastfeeding, please consult your healthcare practitioner before taking food supplements.

Product Focus: Focus and MemoryAlso covers:Brain
Tier ⓘ
Tier 5
Tier 5 · Not endorsed. The evidence contradicts the claims, or the reviews are negative. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
46 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
95% of 1,100
Biohacker Mentions
9 of 10

Study, Trial or Testing Result Summary

Members Only14 human studies · 2 improved
14 human studies2 improved8 no effect638,831 people studied

The only ingredient named on this label is a less active form of vitamin B6, and its amount is hidden in a blend, so we cannot tell whether it reaches the doses used in studies. The best human evidence does not show that B6 supplements improve thinking or memory. A 2021 review pooling 16 trials with 6,276 people found that B vitamin combinations, with or without B6, did not improve any area of thinking ability [1]. A 2017 review of four trials in older people with dementia found that B vitamins including B6 lowered homocysteine, a blood marker, but did not improve memory or thinking scores [2]. A 2025 review in stroke survivors found no benefit, with pooled results leaning slightly worse [3]. A two year trial in 130 people with mild Alzheimer disease found no slowing of decline [4]. A 16 week multivitamin trial in 138 younger adults found no clear thinking benefit [5]. One 2025 trial in 190 older adults with mild memory problems found better memory and arithmetic after 12 months on a combination product containing about 0.96 milligrams of B6, but B6 was not tested alone [6]. Animal and cell studies are never counted.

See all 14 studies →Hide the studies

Review Totals and Summary

Members Only1,100 reviews · 95% positive
1,100 reviews · Google Shopping 1,100
95% positive0% neutral5% negative

I am sorry, but I could not find sufficient qualitative customer feedback specifically for "Brainchild Nutritionals ADHD Vitamin Support" in the provided search results to generate a 300 to 500-word summary of customer themes. The search results primarily focused on product descriptions, ingredients, and general information about the brand's approach to supplementation, with some mentions of "ADHD Mineral Support" customer trust, but not direct reviews for the vitamin product. Therefore, I cannot extract qualitative themes from actual global customer feedback as requested.

Biohacker Summary

Members Only9 of 10 recommend it
9 of 10 biohackers on our panel recommend it

Vitamin D, the main ingredient, drew comments from all ten panelists, and most of them recommend it or take it themselves. They cite brain health, mood, focus, immune support, muscle, and fertility, and several say to test blood levels and aim for a target range, with one saying it only matters if you are deficient. Three of them take 5000 IU of the D3 form each morning, one suggests at least 10,000 IU daily in winter, and another suggests taking a large amount with an early breakfast. Two advise taking it with dietary fat for better absorption, and one pairs it with strength training, while another uses D3 mainly in fall and winter when sun is scarce. No one said they stopped taking it, and the only caution was that supplementing may add little if you are not low.

See all 10 biohackers →Hide the biohackers
  • Dr. Eric Berg · Vitamin D · warns
    • 2 Nov 2026 · warns · Facebook ↗
      Dr. Berg warns that the recommended daily intake for vitamin D is based on a massive error and that the actual necessary amount is closer to 8,895 IU, with millions remaining deficient.
    • 31 Oct 2026 · recommends · YouTube ↗
      Recommends getting vitamin D levels tested to ensure they are between 50 and 70, as vitamin D is intimately involved in regulating prostate size.
    • 30 Oct 2026 · recommends · YouTube ↗
      Recommends taking at least 10,000 IUs of vitamin D3 every single day in the winter, stating it is the most important vitamin to lower cancer risk.
    • 30 Oct 2026 · recommends · YouTube ↗
      Recommends vitamin D to support the immune system, aiming for blood levels between 80 to 100 ng per ml.
    • 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 · recommends · YouTube ↗
      Recommends taking no less than 10,000 IU's of vitamin D3 for osteoporosis, alongside magnesium and K2.
    • 25 Oct 2026 · recommends · X ↗
      Recommends increasing vitamin D to restore balance and support healthy blood pressure.
    • 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.
    • 24 Oct 2026 · neutral · YouTube ↗
      States that a lack of vitamin D can potentially cause achy bones or crashing mood.
    • 24 Oct 2026 · Vitamin C · recommends · YouTube ↗
      Recommends Vitamin C as a cofactor, especially for collagen.
    • 24 Oct 2026 · Vitamin A · neutral · YouTube ↗
      Notes that low vitamin A can lead to dry eyes, dry mouth, and night vision issues.
    • 23 Oct 2026 · recommends · YouTube ↗
      States that vitamin D is intimately involved in the immune system and recommends taking at least 10,000 IUs each 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.
    • 21 Oct 2026 · recommends · YouTube ↗
      States that taking high doses of vitamin D3 for 14 days can improve mood, sleep, low back pain, skin issues, and blood pressure, as well as act as a natural anti-inflammatory and reduce susceptibility to sickness.
  • Dave Asprey · Vitamin D · uses
    • 1 Nov 2026 · uses · Facebook ↗
      Takes Vitamin DAKE from Suppgrade Labs.
    • 25 Oct 2026 · 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 · 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 · uses · YouTube ↗
      States that currently, he is only taking vitamin C and vitamin D.
    • 7 Oct 2026 · Vitamin C · 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.
    • 5 Sep 2026 · 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 · 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 · Vitamin A · recommends · YouTube ↗
      Recommends real vitamin A for people on the spectrum, noting that many cannot convert plant vitamin A and need the good stuff he includes in his Vitam DAKNE product.
    • 29 Aug 2026 · recommends · YouTube ↗
      Dave Asprey recommends Vitamin D3 with K2, explaining D3 is a hormone made from sunlight and K2 directs calcium into bones, not arteries, highlighting its low cost, widespread deficiency, and the ability to test its effectiveness.
    • 18 Aug 2026 · recommends · YouTube ↗
      Recommends Vitamin D as one of the most important supplements for overall health.
    • 18 Aug 2026 · Vitamin E · recommends · YouTube ↗
      Recommends Vitamin E as one of the most important supplements for overall health.
    • 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.
  • 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 · 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.
    • 17 Aug 2026 · recommends · X ↗
      Recommends taking Vitamin D in the morning or at lunch with fat.
    • 14 Aug 2026 · neutral · X ↗
      Notes that Boron improves vitamin D.
  • Ben Greenfield · Vitamin E · neutral
    • 29 Oct 2026 · 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.
    • 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.
    • 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.
    • 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.
    • 20 Aug 2026 · Vitamin D · uses · YouTube ↗
      Has been taking Vitamin D3 K2 for over a decade.
    • 8 Aug 2026 · Vitamin D · neutral · Instagram ↗
      Notes that sunlight influences more than just vitamin D production.
    • 8 Aug 2026 · Vitamin D · recommends · YouTube ↗
      Recommends keeping vitamin D levels high, suggesting that a supplement is probably not a bad idea, especially given that many people are deficient due to spending most of their time indoors.
    • 18 Jul 2026 · Vitamin D · recommends · YouTube ↗
      Recommends getting enough vitamin D for blood pressure management.
    • 9 Jul 2026 · Vitamin C · recommends · YouTube ↗
      Recommends Vitamin C for skin repair post-tattoo.
  • Dr. Mark Hyman · Vitamin D · recommends
    • 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.
    • 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 · 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.
    • 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 · neutral · Podcast ↗
      Mentions vitamin D as a key nutrient for supporting immune function.
    • 5 Oct 2026 · recommends · YouTube ↗
      States that vitamin D is probably the single most important intervention for immune health, recommending levels of 45 to 70 and emphasizing testing to determine the right dose.
    • 5 Oct 2026 · Vitamin A · recommends · YouTube ↗
      Recommends taking 50,000 units of vitamin A for three to five days right at the onset of symptoms if one feels they might be getting sick.
  • Thomas DeLauer · Vitamin C · recommends
    • 26 Oct 2026 · recommends · YouTube ↗
      Recommends taking vitamin C along with collagen about an hour before a workout for connective tissue benefits.
    • 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.
    • 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.
    • 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.
    • 4 Oct 2026 · recommends · YouTube ↗
      Recommends consuming vitamin C to aid in NADPH recycling, which is necessary for glutathione to be reused after neutralizing oxidative stress.
    • 29 Sep 2026 · 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.
    • 29 Sep 2026 · Vitamin D · uses · YouTube ↗
      Takes Purity's liquid vitamin D3 with K2 because she is constantly inside during the day; D3 is for overall wellness and K2 helps the body absorb calcium properly.
    • 18 Sep 2026 · neutral · Facebook ↗
      Compares the Vitamin C content of oranges (53mg) to guava (228mg), noting guava has 4x more.
    • 11 Sep 2026 · Vitamin D · recommends · YouTube ↗
      Recommends getting vitamin D, suggesting it can be obtained while walking.
    • 6 Sep 2026 · Vitamin D · recommends · Instagram ↗
      States that vitamin D is best obtained from the sun, but getting it from food definitely helps, and notes its role as a hormone influencing many cells.
    • 1 Sep 2026 · Vitamin D · recommends · Instagram ↗
      Recommends D3, suggesting a dose of 2000-4000 IU, and notes that MK-7 slowed bone loss over three years.
  • 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.
    • 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.
    • 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.
    • 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.
    • 26 Sep 2023 · Vitamin C · uses · YouTube ↗
      Takes 250 milligrams of Vitamin C.
  • Dr. Rhonda Patrick · Vitamin D · neutral
    • 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.
    • 28 Sep 2026 · recommends · YouTube ↗
      Recommends ensuring adequate vitamin D intake for men's sperm health.
    • 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.
    • 28 Jul 2026 · recommends · Facebook ↗
      Recommends Vitamin D, noting it regulates over 5% of the genome, including genes involved in immune defense, neurotransmitter synthesis, and longevity, and correcting deficiency may slow epigenetic aging.
    • 22 Jul 2026 · neutral · YouTube ↗
      Uses Vitamin D3 as an example of a supplement that an AI model could track to see its impact on other metrics like glucose levels.
    • 26 Jun 2026 · recommends · Facebook ↗
      Recommends Vitamin D, explaining that it regulates over 5% of the genome, including genes involved in immune defense, neurotransmitter synthesis, and longevity.
    • 15 Jun 2026 · neutral · Instagram ↗
      Combining omega-3s with vitamin D and exercise has an additive effect, translating to ~3 months of slowed biological aging.
    • 11 Jun 2026 · neutral · Facebook ↗
      The effect got stronger when omega-3 was combined with vitamin D and resistance training, with the full stack delaying phenotypic aging by about 3.8 months.
    • 5 Jun 2026 · Vitamin C · recommends · Instagram ↗
      Recommends nutrients like vitamin C for men to prioritize sperm mitochondrial health.
  • Andrew Huberman · Vitamin D · neutral
    • 21 Sep 2026 · 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.
    • 7 Aug 2026 · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning for longevity.
    • 20 Jul 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning for general health.
    • 20 Jul 2026 · recommends · YouTube ↗
      States that Vitamin D is one of the critical nutrients with the best evidence for cognitive function and reducing the risk of dementia.
    • 13 Jul 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning.
    • 12 Jul 2026 · uses · X ↗
      He takes 5,000 IU of Vitamin D3 in the morning for overall health.
    • 6 Jul 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 in the morning.
    • 22 Jun 2026 · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning for general health.
    • 17 Jun 2026 · uses · X ↗
      Takes 5000 IU of Vitamin D3 every day for longevity.
    • 17 Jun 2026 · Vitamin E · uses · X ↗
      Takes a multivitamin every day for longevity.
    • 17 Jun 2026 · Vitamin C · uses · X ↗
      Takes a multivitamin every day for longevity.
    • 17 Jun 2026 · Vitamin A · uses · X ↗
      Takes a multivitamin every day for longevity.
    • 6 Jun 2026 · uses · X ↗
      Takes 5,000 IU of Vitamin D3 in the morning.
    • 2 Feb 2026 · Vitamin C · recommends · YouTube ↗
      Recommends AG1, a vitamin, mineral, and probiotic drink, and notes that for a limited time, a subscription comes with additional supplements.
  • Peter Attia · Vitamin D · uses
    • 4 Jan 2026 · uses · YouTube ↗
      Lists vitamin D as one of her staple supplements.
    • 16 Nov 2025 · neutral · YouTube ↗
      Notes that several studies show patients taking vitamin D can reduce TPO levels and prolong the honeymoon period of Hashimoto's disease.
    • 6 Aug 2025 · 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 · 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 · 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 · 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 · 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.
    • 6 Jul 2025 · neutral · YouTube ↗
      Suggests that supplementing with lots of vitamin D might overcome the negative effects of phenytoin on bone health by counteracting increased catabolism of vitamin D and subsequent decreased calcium absorption.
    • 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 · recommends · YouTube ↗
      Recommends vitamin D for people who tend to be vitamin D deficient, such as those living in Portland, Oregon.
    • 1 Jun 2025 · Vitamin A · neutral · YouTube ↗
      Mentions that a lot of the profound transformation of a cell into a sperm, specifically the making of a tail, is vitamin A driven.

RAL Summary

Members OnlyTier 5 for Focus and Memory

Several large pooled reviews and long trials found that B vitamins including B6 do not improve thinking or memory, which meets the rule for an ineffective rating [1][2]. The one positive trial used a combination product, so it does not show that B6 itself helps [6].

  • Not endorsed.

Where the evidence disagrees: 8 of the 14 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Nervous system

Combine with: To further enhance mood support and emotional balance, consider combining this supplement with Omega-3 fatty acids (EPA/DHA), which are vital for brain cell function and have anti-inflammatory effects beneficial for mood. An adaptogenic herb like Ashwagandha or Rhodiola Rosea could also be synergistic, helping the body manage stress and promote a sense of calm. Additionally, supporting gut health with a high-quality probiotic may contribute to overall emotional well-being through the gut-brain axis.

Possible side effects: No major side effects reported.

Supplement Facts

Total Carbohydrates 3 g · Vitamin A 2000 IU · Vitamin C 167 mg
Supplement Facts
Serving Size 1-4 Teaspoon(s)
Servings Per Container 48
Amount Per Serving% Daily Value
Calories10
Sodium5 mg
Total Carbohydrates3 g
Vitamin A2,000 IU
Vitamin C167 mg
Vitamin D3133 IU
Vitamin E42 IU
Vitamin B17 mg
Vitamin B27 mg
Vitamin B312 mg
Vitamin B67 mg
Quatrefolic167 mcg†
Vitamin B12200 mcg
Biotin167 mcg
Vitamin B533 mg
Choline20 mg
Inositol27 mg†
Bioflavonoids17 mg†
Trimethylglycine33 mg†
L-Glycine33 mg†
Dimethylaminoethanol Bitartrate13 mg†
N-Acetyl Cysteine5 mg†
† Daily Value not established.

Other ingredients: Water, Purified, Proprietary herbal Infusion, Xanthan Gum, Glycerin, Potassium Sorbate.

Directions: Suggested use: As a dietary supplement, take 2 times a day with food. May mix with water. Start low and increase gradually to full dose. Dose by body weight: 25-30 lbs 1tsp, 2 times a day 50-60 lbs 3 teaspoons, 3 times a day 90-100 lbs 4 teaspoon, 2 times a day

Barcode (UPC) 813348011368 · Label source: NIH label database · Report a label change

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Our articles on this subject

Graded November 3, 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.