Vitamin B7

Vitamin B7 — dosage, safety & deals FAQ

How much Biotin do you need per day?

There is no RDA for biotin; the Food and Nutrition Board set only Adequate Intakes (AIs). For adults 19+ years the AI is 30 mcg/day. Pregnancy is 30 mcg/day and lactation 35 mcg/day. Infants 0-6 months need 5 mcg, children rise from 8 mcg (1-3 years) to 25 mcg (14-18 years). — per the NIH Office of Dietary Supplements; general information, not medical advice.

Can you take too much Biotin?

The Food and Nutrition Board could not set a Tolerable Upper Intake Level because there is no evidence biotin is toxic at high intakes; studies found no adverse effects of 10-50 mg/day. However, high intakes can cause falsely high or low laboratory test results, possibly leading to misdiagnosis or inappropriate patient management. — per the NIH Office of Dietary Supplements; general information, not medical advice.

What are the signs of Biotin deficiency?

Signs typically appear gradually: thinning hair progressing to total body hair loss; scaly red rash around the eyes, nose, mouth, and perineum; conjunctivitis; ketolactic acidosis and aciduria; seizures; skin infection; brittle nails; neurological findings (depression, lethargy, hallucinations, paresthesias) in adults; and hypotonia, lethargy, and developmental delay in infants. — per the NIH Office of Dietary Supplements; general information, not medical advice.

Who is most likely to need more Biotin?

Groups most likely to have inadequate biotin status include individuals with biotinidase deficiency (a rare disorder preventing release of free biotin), individuals with chronic alcohol exposure (which inhibits biotin absorption; 15% of people with chronic alcoholism have low plasma biotin), and pregnant and breastfeeding women (at least a third of pregnant women develop marginal deficiency). — per the NIH Office of Dietary Supplements; general information, not medical advice.