These vitamins worked very well for me, I started taking them because of hair loss during the summer, and I saw improvement in reducing hair loss towards the end of the first bottle. It should be noted that I was taking 2 capsules per day. It is also very important for me that the capsules are relatively small, and I never choked on them while trying to take them. I mention this because with other vitamins that had larger capsules, I took them with fear and trembling, afraid that they would get stuck in my throat (I have experienced this, that's why I'm saying it)