I recently decided to end my horrible nail biting habit after many, many years of biting. When I stopped, my nails were in horrible shape. They were thin and super short, and I was embarrassed for people to even see them. But I was able to end the habit, and wanted to take a supplement to help with the strength and growth. I had heard good things about Biotin, so I started taking 2500 mcg (softgels) once a day along with a multivitamin. I bought mine at Target on sale for about $7. I have also been applying strengthener and keeping my nails moisturized, which has probably helped. My results have been amazing. It has been just over a month since I started, and my nails are very strong and have grown at least 5mm (not an exaggeration..I've been monitoring them closely). They are now to my fingertips and look so much healthier. I have also noticed faster hair growth, although this was not my reason for taking Biotin. I have not had any bad acne like I have heard of others experiencing. This may be because I have been drinking plenty of water. I cannot recommend this enough! I will definitely continue to repurchase! I can't believe the price considering how well this stuff works.