Firstly, I really like the taste of these gummies. They don't taste super artificial. These don't upset my stomach either. Secondly, I definitely notice a different in my hair, it grows way quicker. I only notice a slight difference with nails and skin, but I did not really buy these gummies for that reason. I think it's important to note that supplements, vitamins, etc work differently for everyone depending on the way your body processes this product. This is just my experience. I have tried various hair, skin, nails supplements over the years but this is the one I have repurchased the most.