I recently purchased 2 bottles of the Biotin 5000 not realizing I had a bottle of 10000 in my abundance of items I purchase in the past. Well I have to say the 10000 by itself works wonders. I take 1 a day and it is working just great. I noticed a difference in my hair and skin just like other people stated. And, my hair is not breaking like it used to or shedding like crazy. It is amazing vitamin. And, I used glycerin and conditioner 50/50 and let it sit and rinse and my hair is super soft. I wanted to go back to a perm but not now. I can finally manage my hair. 2 years natural and I am looking forward to see what the next year or two how my hair and skin will look. I purchased other vitamins to go along with the Biotin like vitamin D but I need to finish some of the products I already opened. I hope I inspired someone out there who is looking for some affordable products to buy.