Is 1mg of biotin a lot?

Biotin: Biotin is vitamin b7, and is water-soluble. It most often comes in "mcg" doses -- there are 1000 mcg in 1 mg. Deficiencies are rare, as daily needs are small (around 50 mcg/day in adults) and it's abundant in food. Long-term antiseizure meds or antibiotics, intestinal malabsorption, & eating raw egg whites can lead to biotin deficiency. If you have one of these issues, 1mg is okay.