Hair today, gone tomorrow. It's every woman's worst nightmare. We're talking about hair loss or thinning of the hair. For most women, it's natural to lose an average of up to 100 hairs every day. It seems like a lot until you consider there are about 100,000 hairs on your head. So losing that amount shouldn't be a big cause for concern, especially as you age. Unfortunately, thinning hair is part of the aging...