Biotin is a good natural product to use. It will strengthen your hair, nails, skin. Every supplement/medications have side effects. Biotin could possibly increase facial hair and cause acne among other things. I counteract the side effects with a Vitamin B complex, which is good for you as it will help increase blood flow to the scalp. And of course a multivitamin, Protein, and Water. A shampoo wtih Vitamin E and Keratin. I am a nurse practitioner and I have prescribed this to many patients and have seen great results. As always, check with your doctor before taking any supplements. Best Wishes!