After looking into this further, this is one common factor that may help stop this. Most people are not getting an ample amount of B12/Folic Acid. It is not available at all in any vegetarian diet; people who eat meat do get this, because of the bacteria stored in a cows tissue. However, with the change in diet for cows and the excessive use of hormones and steroids, I believe even meat eaters are not getting an ample amount of this vitamin. It is very easy to add a supplement to your diet, 1-2 pills daily with food. B12/Folic Acid is not just important for your hair, but for those who may have found themselves experiencing some of the health issues listed above, specifically anemia, thyroid issues and stress, will find that adding this supplement will balance out some of those issues.
Aside from taking this supplement, another factor in hair loss is likely our diet. Most people have a very acidic diet, filled with processed foods, overly cooked foods, very few fruits and vegetables and high in animal product. The more acidic your body, the more prone to disease. Also, most of the foods on the Standard American Diet are very low on vitamins and minerals, so when your body is deficient, it starts to pull from your bones and anywhere else it can in order to function, which would account for hair loss. This would also be a factor if you have an autoimmune disease.
Hair loss is not fun, so take your vitamins, eat your veggies, and enjoy a long life of luscious locks!