GNC Women's Multivitamin Prenatal Gummy Raspberry Lemonade Review
Tier ⓘ
Tier 4 · Rank 1
Tier 4 · Emerging. A promising mechanism or animal data, with thin human evidence so far. Rank 1 within Tier 4 for Thyroid Health; 30 of 61 overall. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
36 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
72% of 3,178
Biohacker Mentions
0 of 10
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Study, Trial or Testing Result Summary
Members Only1 human studies · 0 improved
1 human studies0 improved1 no effect103 people studied
Very little research has looked at whether multivitamins help thyroid health in people. Only one human study was found. It looked back at the diets and habits of 103 schoolchildren in a region of Russia. Their diets were often short on iodine, zinc, vitamin A and beta-carotene, and about a third of the children took multivitamins [1]. The study did not report any thyroid benefit linked to taking multivitamins [1]. Because it only observed the children, with no placebo group, no stated dose and no stated length of use, it cannot show whether multivitamins help the thyroid or not [1]. No controlled trials have tested this question. This product's label does not list the amount of each vitamin or mineral, so the doses are hidden in a blend, and it is not possible to tell whether it supplies nutrients such as iodine at levels that matter for the thyroid. It is also a prenatal formula, made for pregnancy rather than for thyroid care. Overall, there is not enough good evidence to say whether this gummy helps thyroid health. Animal and cell studies are never counted.
See all 1 studies →Hide the studies
- In a retrospective study of 103 schoolchildren in the Republic of Adygea, diets were often short on iodine, zinc, vitamin A and beta-carotene, and 37% took multivitamin preparations, but the abstract reports no thyroid benefit linked to multivitamin use.[Assessment of the structure and quality of nutrition as a factor that influences thyroid functional activity].
Review Totals and Summary
Members Only3,178 reviews · 72% positive
3,178 reviews · Amazon 3,178
72% positive6% neutral22% negative
Extensive customer reviews and qualitative feedback are currently being aggregated for this product. Check back soon for a detailed sentiment analysis.
Biohacker Summary
Members Only0 of 10 recommend it
0 of 10 biohackers on our panel recommend it
Vitamin D is the main ingredient here, and nearly the whole panel spoke about it: most of them recommend it or take it, and the rest were neutral. Three of them take 5000 IU of D3 in the morning for general health or longevity, and others say to aim for higher blood levels, with one giving a target of at least 50 to 80 ng/mL. Panelists want it for bone strength, immune function, brain health and avoiding low levels that bring fatigue, and one advises taking it with dietary fat for better absorption instead of in the morning with other supplements. Vitamin C was recommended by four of them, mostly paired with collagen for joints and connective tissue, and some also back a multivitamin, though one warns generic ones are often full of fillers and synthetics and another says form and dose matter. Vitamins A and E drew only brief neutral comments, and nobody said they stopped taking any of it.
See all 10 biohackers →Hide the biohackers
Dr. Eric Berg · Vitamin D · neutral
- Lists Vitamin D as an ingredient found in sardines.
- 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.
- 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.
- Dr. Berg states that when nutrients like vitamin D are too low, fatigue and weakness can follow.
- Warns against generic multivitamins, stating they are often full of fillers and synthetics.
- Warns against generic multivitamins, stating they are often full of fillers and synthetics.
- Warns against generic multivitamins, stating they are often full of fillers and synthetics.
- Recommends focusing on vitamin D3 to support stronger bones if a neck hump is associated with osteoporosis.
- Recommends a minimum of 10,000 IU of vitamin D per day to support natural killer cells.
- Mentions that bleeding or swollen gums point to vitamin C deficiency, and sugar competes with it directly, reducing absorption.
- Suggests that increasing vitamin D3 may help address the underlying problem of bruxism.
- 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.
- States that magnesium is needed to absorb vitamin D.
- Recommends getting vitamin D levels tested to ensure they are between 50 and 70, as vitamin D is intimately involved in regulating prostate size.
Dr. Rhonda Patrick · Vitamin D · neutral
- 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.
- 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.
- Mentions that daily multivitamins improved cognition in older adults in the COSMOS trials, with benefits equivalent to roughly 2 fewer years of global cognitive aging.
- Discusses a study where giving older adults a multivitamin improved cognition and slowed brain aging by about two years.
- 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.
- Mentions that a simple multivitamin taken for 3 years reduced global brain aging by about 2 years and episodic brain aging by almost 5 years, leading to small improvements in overall cognitive function.
- Vitamin D supplementation was linked to a 40% lower risk of dementia in an observational study of more than 12,000 older adults.
- Mentions that vitamin D also plays a role in maintaining muscle mass.
- Recommends ensuring adequate vitamin D intake for men's sperm health.
- Recommends adding a multivitamin for men's sperm health.
- 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.
- Notes that a simple multivitamin may be influencing several layers of aging biology at once and seems like a low-cost, low-risk supplement alongside a strong foundation of diet, sleep, and exercise.
- Believes that the power of a simple multivitamin has been drastically underestimated, citing a new publication from the COSMOS trial that shows two years of a daily multivitamin shifted seven metabolomic aging clocks in a younger direction.
- Notes that a multivitamin can provide trace elements that might be lost from reverse osmosis water, especially if one eats a diverse diet.
Thomas DeLauer · Vitamin C · recommends
- 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.
- 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.
- Would take a multivitamin to ensure micronutrition during protein sparing modified fasting.
- Recommends taking vitamin C along with collagen about an hour before a workout for connective tissue benefits.
- Uses vitamin C as part of their immunity duo, stating it is important for boosting the immune system, especially during cold and flu season.
- Uses vitamin D3 in the fall and winter months when getting less sun, as it's important to supplement it then.
- Recommends taking a massive amount of vitamin D simultaneously with an early morning massive breakfast to help reset circadian rhythms and address hyperphagia.
- Recommends Vitamin D, stating that it has receptors throughout the brain and deficiency can quickly impact brain and mood.
- Takes supplemental vitamin D because he is skin sensitive and from northern latitudes, limiting his UV exposure.
- Recommends taking vitamin D on non-liver days to ensure both nutrients get proper receptor access.
- Recommends consuming vitamin C to aid in NADPH recycling, which is necessary for glutathione to be reused after neutralizing oxidative stress.
- 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.
- 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.
- Compares the Vitamin C content of oranges (53mg) to guava (228mg), noting guava has 4x more.
Dr. Mark Hyman · Vitamin D · uses
- 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.
- Mentions that the body makes vitamin D from sunlight exposure, and a deficiency can hinder calcium absorption, which is crucial for strong bones.
- Recommends Vitamin D for health, stating that amazing things happen when patients' vitamin D statuses reach optimal levels.
- Mentions vitamin D as an existing biomarker that plays a role in mental health, which Function Health includes in their measurements.
- Notes that vitamin D plays a role in immune function.
- Mentions that vitamin A levels can be looked at to get a deep sense of what's happening with nutrient levels.
- Recommends vitamin C as a basic supplement during detoxification to help with inflammation and detoxification.
- Recommends checking vitamin D levels and states that if they had to pick one single intervention for immune health, vitamin D would be it.
- Dr. Hyman discusses vitamin D in relation to sun exposure patterns.
- States that vitamin D supplementation can help with oxidative stress.
- Dr. Hyman mentions vitamin C as an advanced therapy for skin repair.
- Mentions topical vitamin C as an antioxidant that can help skin with aging.
- Mentions that what they do when a cold comes on is not just vitamin C.
- Mentions vitamin D as a key nutrient for supporting immune function.
Dave Asprey · Vitamin C · neutral
- Recounts a doctor telling him in his 20s that vitamin C would kill him.
- Takes Vitamin DAKE from Suppgrade Labs.
- Suggests that vitamin D supports brain health, muscle function, and focus.
- Recommends taking vitamin C for better skin health.
- Notes that a multivitamin may have the right nutrients on the label, but the form and dose matter.
- 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.
- States that currently, he is only taking vitamin C and vitamin D.
- States that currently, he is only taking vitamin C and vitamin D.
- 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.
- 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.
- 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.
- 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.
- 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.
- Recommends Vitamin D as one of the most important supplements for overall health.
Siim Land · Vitamin D · recommends
- Advises against taking vitamin D in the morning with other supplements because it is fat soluble and requires dietary fat for better absorption.
- Recommends taking Vitamin D with fat for better absorption.
- Recommends taking vitamin C with collagen to support joint collagen synthesis.
- States that Vitamin D connects biology to light and that UVB reaching the skin enables its production.
- 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.
- Lists sauerkraut and fruit as sources of Vitamin C.
- Lists liver and carrots as sources of Vitamin A.
- Thinks vitamin D has some of the strongest evidence and is worth considering.
- Notes that Vitamin K2 pairs well with vitamin D by regulating calcium and bone mineralization.
- Notes that Vitamin C is one of several supplements with human evidence.
- Recommends a multivitamin for older people to help cover nutrient gaps as they tend to undereat.
- Recommends taking vitamin D supplements with some fat to maximize its absorption, suggesting with food or a teaspoon of olive oil.
- Notes that taking vitamin D3 with a fat-containing meal resulted in 32% higher peak blood vitamin D levels.
- Recommends taking Vitamin D in the morning or at lunch with fat.
Ben Greenfield · Vitamin E · neutral
- 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.
- 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.
- 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.
- Notes that Vitamin A is a fat-soluble vitamin that supports healthy skin cell turnover.
- Mentions vitamin C as part of a bare-minimum protocol.
- Mentions vitamin D as part of a bare-minimum protocol.
- 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.
- 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.
- 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.
- Has been taking Vitamin D3 K2 for over a decade.
- Notes that sunlight influences more than just vitamin D production.
- 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.
- Recommends getting enough vitamin D for blood pressure management.
- Recommends Vitamin C for skin repair post-tattoo.
Bryan Johnson · Vitamin D · uses
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- 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.
- Takes 5000 IU of Vitamin D3 in the morning for longevity.
- He takes 5000 IU of Vitamin D3 in the morning for general health.
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- Takes 5,000 IU of Vitamin D3 in the morning for longevity.
- Takes 5,000 IU of Vitamin D3 in the morning.
- Takes 5,000 IU of Vitamin D3 in the morning.
- He takes 5000 IU of Vitamin D3 in the morning for general health.
- 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.
- Applies vitamin C after showering.
- Takes 250 milligrams of Vitamin C.
Andrew Huberman · Vitamin D · neutral
- 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.
- Takes 5,000 IU of Vitamin D3 in the morning for longevity.
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- States that Vitamin D is one of the critical nutrients with the best evidence for cognitive function and reducing the risk of dementia.
- Discusses the Cosmos study, which showed that a basic multivitamin like Centrum Silver, providing 100% of the recommended daily allowance, led to improvements in cognitive function in older adults, suggesting it's a reasonable strategy for the general population.
- Takes 5000 IU of Vitamin D3 in the morning.
- He takes 5,000 IU of Vitamin D3 in the morning for overall health.
- Takes 5000 IU of Vitamin D3 in the morning.
- Takes 5,000 IU of Vitamin D3 in the morning for general health.
- Takes 5000 IU of Vitamin D3 every day for longevity.
- Takes a multivitamin every day for longevity.
- Takes a multivitamin every day for longevity.
- Takes a multivitamin every day for longevity.
- Takes 5,000 IU of Vitamin D3 in the morning.
Peter Attia · Multivitamin · uses
- Lists a multivitamin as one of her key supplements.
- Lists vitamin D as one of her staple supplements.
- Notes that several studies show patients taking vitamin D can reduce TPO levels and prolong the honeymoon period of Hashimoto's disease.
- States that in mouse studies, there was a combined effect of alpha ketoglutarate with vitamin D for both sexes.
- Notes that in mouse studies, there was a combined effect of alpha ketoglutarate with vitamin A for male mice.
- 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.
- In mouse studies, Peter Attia's team found a combined effect of AKG with Vitamin D for both sexes.
- In mouse studies, Peter Attia's team found a combined effect of AKG with Vitamin A for male mice.
- 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.
- 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.
- 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.
- 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.
- 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.
- Recommends vitamin D for people who tend to be vitamin D deficient, such as those living in Portland, Oregon.
RAL Summary
Members OnlyTier 4 for Thyroid Health
Tier 3 needs some study support, but the only study is a small observational one that found no thyroid benefit from multivitamins, so the evidence is thin and fits tier 4. So it is graded Tier 4, lower than the rules alone gave.
- Emerging: not enough evidence to rank higher yet.
Where the evidence disagrees: 1 of the 1 human studies found no effect.
More Details
Members OnlyBody systems · Combine with · Possible side effects
Body systems: Endocrine system
Combine with: Combine with a healthy diet and lifestyle.
Possible side effects: No major side effects reported.
Supplement Facts
Total Carbohydrates 4 g · Vitamin A 650 mcg RAE · Vitamin C 20 mg
Supplement Facts
Serving Size 2 Gummy(ies)
Servings Per Container 45
Amount Per Serving% Daily Value
| Calories | 20 | |
| Total Carbohydrates | 4 g | |
| Vitamin A | 650 mcg RAE | |
| Vitamin C | 20 mg | |
| Vitamin D | 20 mcg | |
| Vitamin E | 19 mg | |
| Niacin | 18 mg NE | |
| Vitamin B6 | 2 mg | |
| Folate | 600 mcg DFE | |
| Vitamin B12 | 2.8 mcg | |
| Biotin | 35 mcg | |
| Iodine | 220 mcg | |
| Zinc | 3.8 mg | |
| Omega-3 Fatty Acids | 65 mg | † |
† Daily Value not established.
Other ingredients: Glucose Syrup, Sugar, Water, Gelatin, Citric Acid, Turmeric, Paprika Extract, Radish Concentrate, Caramel color, Lactic Acid, Natural Flavors.
Directions: Directions: As a dietary supplement, adults take two (2) gummies per day. Chew thoroughly before swallowing.
Barcode (UPC) 048107217457 · Label source: NIH label database · Report a label change
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- Supplement and Medication Interactions You Should KnowArticle · Oct 20, 2026
Graded November 10, 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.
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