You are advised to take this product for three full months. I have completed one month. I took this product to strengthen my nails and hair. After one month, I am noticing a soft shine to the hair on my crown, and less bridging on my nails. I will be buying for another two months.

I think these supplements hav helped me with hair growth. Thickness hasn't changed, but I notice more roots than normal.

Viviscal Extra Strength gives you the hair strngth I have always desired for giving it a try for two to three months to work as a magic! I found my hair longer and thicker than ever before. The result is so impressive and dramatic. Great product!