Product verdict
Vimerson Health Biotin for Hair
13 ingredients on the label. One ingredient has weaker evidence behind it, at an amount this bottle reaches.
What it might help with
Real research, at an amount this bottle reaches — just weaker or more divided than the evidence behind a use we would stand on.
- Brittle NailsMixedfrom Biotin
Supplement Facts
Serving Size 1 Capsule(s)
Servings Per Container 60
† Daily Value not established, or not stated on this label.
Worth knowing about this bottle
Zinc with Iron
Taking a high-dose iron supplement at the same time as a zinc supplement can reduce how much zinc your body absorbs, and the reverse can happen too.
What to do: Supplements with 25 mg or more of elemental iron taken alongside zinc can reduce zinc absorption and plasma zinc concentrations. Take iron and zinc supplements a few hours apart if either dose is high. In children's supplementation programs, combined iron+zinc dosing has been shown in some trials to blunt the benefit each nutrient would have alone.
Magnesium with Zinc
Very high doses of zinc from supplements can interfere with magnesium absorption and disrupt the body's magnesium balance. This has only been demonstrated at zinc doses far above typical supplement amounts.
What to do: Only a concern at very high zinc doses (142 mg/day and up), well beyond a standard 15-30 mg zinc supplement. Not relevant for typical multivitamin or standalone zinc use.
Vitamin B5 (Pantothenic Acid) with Biotin in theory only
Pantothenic acid and biotin are absorbed by the same intestinal transporter, so very large amounts of one can, in theory, reduce uptake of the other. This has been shown in cell studies, not confirmed as a real-world problem in humans at normal supplement doses.
What to do: Not a concern at typical supplement doses. Worth noting only for people taking very high doses of one of these vitamins for extended periods; there is no established human clinical syndrome from this competition alone (deficiency in practice is driven by genetic transporter defects, not by this competition).
Zinc Picolinate with Iron Bisglycinate
Zinc and iron compete for absorption when taken together in supplement form.
What to do: Take zinc and iron supplements at different times of day for better absorption of both.
Vitamin D3 and Magnesium work better together
Magnesium is needed to convert vitamin D into its active form. Without enough magnesium, vitamin D supplements may work less well because the enzymes that activate vitamin D can't function properly.
Vitamin B3 (Niacin) and Iron work better together
The enzyme that helps the body turn dietary tryptophan into niacin is an iron-containing (heme) enzyme, so someone who is iron-deficient converts less tryptophan into niacin.
Vitamin C and Iron work better together
Taking vitamin C alongside plant-based (non-heme) iron helps the body absorb more of that iron. This matters most for people relying on non-meat iron sources, like vegetarians or those using iron supplements.
Vitamin C and Iron Bisglycinate work better together
Vitamin C enhances non-heme iron absorption by up to 67%, converting ferric iron to the more absorbable ferrous form.
Vitamin D3 and Magnesium Glycinate work better together
Magnesium is required for vitamin D metabolism. Deficiency in either impairs the other's function.
4 present in trace amounts
Far under everything studied. No trial speaks to what this much does.
- Some evidence for chronic inflammation — dose is 80% short of the 500–2000 mg tested.
- Some evidence for slow recovery — dose is 80% short of the 500–2000 mg tested.
- Supports high blood pressure — dose is 99% short of the 500–2000 mg tested.
- Some evidence for acne — dose is 90% short of the 1000–2500 mg tested.
- Some evidence for blurry vision — dose is 92% short of the 120–160 mg tested.
Label read from the NIH Dietary Supplement Label Database. Formulations change — check the panel on the bottle in your hand. Check a different product.