Hair loss prevention tips run the gamut from the sensible to the ridiculous. In many cases, knowing the cause of the hair loss is the key to knowing what to do about it. Some forms of hair loss may be temporary, while other forms are more permanent. When it comes to male pattern baldness, which is basically the result of high levels of a form of testosterone called DHT in the scalp, there are some general things you can do in addition to medically treating the high DHT levels, if you choose to do so.
First of all, chemical processing, such as dyes and perms are very hard on hair and can accelerate hair loss. Excess product build-up such as hair sprays, mousses, or gels can also lead to breakage or damage. Your best bet is mixing the chemical processing altogether and choosing hair products that are made from natural ingredients.
Another tip is to learn to avoid stress and learn to cope with stress effectively. Extreme stress can result in hair loss, though this hair loss is often temporary. However, it is a good overall lifestyle choice to de-stress your life when you can. Getting enough sleep and eating properly help a lot, and regular exercise works wonders and improves circulation throughout the body (including to the scalp).
Knowing your family history when it comes to hair loss is important. If you have a family history of hair loss, you should make sure that starting at a young age - even before you experience any hair loss - you learn to take good care of your hair and scalp and make sure that you eat a properly balanced diet.
And finally, consult the experts. There are medical treatments by prescription for hair loss, and there are over-the-counter treatments too. A number of herbal supplements claim to improve hair thickness, and there are shampoos and conditioners specially formulated to make the most of thinning hair. 

When it comes to hair loss prevention tips alopecia areata is often neglected, because it is relatively rare. This is a different type of hair loss than male pattern baldness. The cause or causes of alopecia areata are not known, though there is suspicion that it is related to an autoimmune disorder, and family history is implicated in about 20% of cases.
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With this condition, stress reduction is essential, as it is with all autoimmune diseases. Medications such as Kenalog may be helpful. Regular exercise improves circulation and keeps testosterone levels balanced properly. And many people say that supplements such as borage oil, blackcurrant, and zinc are helpful with alopecia areata.