My wife is 29 years of age and loses hair. How can this be stopped?

See a MD for cause. First of all, check for the ingredients that may cause hair loss in any hair care products. Secondly, check for a family history of early hair loss or hair growth in places(face) that a woman normally does not have. Finally, thyroid malfunctions, male hormone producing growths can all cause early hair loss so please see a md for evaluation.