I swear by this one. I got all the girls in my nursing program to go on them . Everyone thought my nails were fake while I took these and then when I told them they were my nails and that I took this brand of biotin they all went out and bought. It does have other ingredients in it but they are just beneficial to the cause. I took just plain biotin at one point after being on the GNC and I never got the same great results. But you get what you pay for. I recommend the GNC one all the way