How much biotin should you take a day? The National Institutes of Health recommends a biotin dose of 20 to 30 micrograms (mcg) per day for teenagers and adults to prevent biotin deficiency. Biotin is taken from the foods we eat by the microflora of the large intestine.
How much biotin should you take for hair growth? 2-5 milligrams
Is 10000 mcg biotin too much? Mayo Clinic states that 10,000 mcg is a safe dose, as no adverse side effects have been noted to date. Reassuringly, even “mega doses” of 300,000 mcg found no side effects in neurological research.
How Biotin Should You Take
Adults and teenagers—30 to 100 micrograms (mcg) per day.
Children 7 to 10 years of age—30 mcg per day.
Children 4 to 6 years of age—25 mcg per day.
Children birth to 3 years of age—10 to 20 mcg per day.