Hair Loss Vitamins

I learned that hair loss is hereditary as well as a result of vitamin deficiencies. In my family, especially my mother side we have very thin and fine hair strands. I noticed that when I got pregnant my hair loss is very alarming. I can pull a lot of hair when I take a shower or comb my hair in the morning. I have been searching for vitamins for hair loss but so far I did not find the one that will work with me. I also use different shampoo and hair products hoping the condition will improve but so far no luck yet. This is also the reason why I don't wanna try having hair color because I'm afraid it will damage more my hair. The last time I went to a salon for hair treatment was last year. I bought the hair products they recommended to me but didn't even finish the whole bottle. I hope to find an effective vitamins soon to cure my hair loss problem.