I'm not sure yet but I have the feeling it's working. I'm combining these with other products from Solgar (huge range).

I have been using these vitamins for about 2 years already and I've noticed a difference taking them: my hair is falling out less. Definitely recommend!

I noticed a good effect only on my skin, it really became much cleaner, but my nails remained the same brittle, the quality of my hair is absolutely the same, I will look for something else

It’s good, but I think you need at least two packages to see the result. 

I have been using these tablets from Solgar for a couple of months and l feel like l can see a difference with my hair and nails. The tablets might not be the only thing making the difference but l feel like they definitely help and are easy to take