F rom stem cell scalp serums to kitchen-concocted herbal rinses and viral rosemary oils, hair growth has become all the rage. With over 1 million posts under the hashtag #hairgrow ...

Male pattern baldness and natural aging may cause hair to thin. Some treatment options may help restore hair, depending on the underlying cause. Thinning hair is a natural part of getting older.

So why do women lose their hair, what treatments help – and which definitely don’t?What's normal for hair growth? Your hair ...