Biotin is a water-soluble vitamin that typically causes no side effects, even in those who take it in high doses. Those who do experience side effects most often report cystic acne breakouts that clear up when they stop taking the supplement. Certain people also have allergic reactions to it, and taking it with certain medications can make them less effective. Pregnant women should not take biotin without consulting a healthcare professional because of possibility of miscarriage Common causes of hair fall include androgenic alopecia, fungal infection, nutritional deficiency, alopecia areata (auto – immune), and cancer chemo/radiotherapy. Treatment depends upon the cause. Advice 1. Consult a dermatologist of your area so that he/she can rule out other causes 2. High protein and vitamin rich diet such as eggs, meat, vegetables, cheese etc. 3. Do not take much tension as anxiety/depression aggravates hair loss 4. You can take an over the counter nutritional supplement like Revital capsule once daily temporarily to correct any nutritional deficiency Thanks