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References The Lancet (2023) Rosenstock J, et al
Presented for research literature review only Kulinski VI et al
B vitamins including biotin and folate may support healthy-looking skin, hair, and nails as part of your overall wellness routine
To achieve blood levels of at least 30 ng/mL, adults living at temperate latitudes (think: anywhere with distinct seasons) need 800 to 1,000 IU per day, ideally from vitamin D3, which is more effective than D2
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