For healthy tresses, it's not just what you put on your hair that counts but what you put in your body -- especially when it comes to thinning hair, according to a new report.

While you can't change your genes, which are often to blame for hair loss in both men and women, most people don't realize that other causes of hair loss may be temporary and reversible, stated MyHealthNewsDaily in a report last week. One surefire way to improve a bad hair day? Change your diet, noted that article.