While biotin is necessary for normal body function, and supplements may help pregnant women and some people with diabetes,Keratin is a basic protein that makes up your hair, skin, and nails. ... Research on the effects of biotin on hair growth is sparse. To date, there's only limited evidence to suggest that increased biotin intake may help promote hair growth
proponents often recommend taking 2 to 5 mg (2000 to 5000 mcg) of biotin in supplement form daily in order to strengthen hair shafts and achieve results.
Macronutrient metabolism. Biotin is important for energy production.
Brittle Nails. Brittle nails are weak and easily become chipped, split or cracked.
Pregnancy and breastfeeding.
Reduced blood sugar in people with diabetes.