They do say that but they should say what the cause is of Alopecia is and how to prevent it. This is a reply I received from someone who is having success at ending loss by using the only safe natural treatment I found that actually restores growth.as well. "I would like to thank u alot for ur answer , about getting bald, and i was amazed by the results,,,, it worked!!!! finally something worked, thank u very much," See my Best Answers.
Despite what you read about genetics and other factors being cause, some of principal reasons are harmful shampoos and equally harmful medicated shampoos and medications which we then use to correct problem. We are seeing a hair loss epidemic in both males and females and its occuring at ever younger ages – as young as 14 and 15. We compound the problem by over washing hair – some do so everyday – and that is promoted by shampoo manufacturers. Do a Google search "washing hair daily harmful?" See dozens of sites listing harm. Also compounding problem is use of countless other hazardous chemical filled products , use of hair driers, permanents, straighteners, etc.etc.
See this site http://www.peterdunn.org.uk It’s warning you of the hazards of shampoos."Shampoos damage your hair, so you should check the ingredients for sodium laurel sulphate, sodium laureth sulphate, and propylene glycol, all of which are harmful to health.
Sodium Laurel sulphate is a dangerous substance which foams readily, making the shampoo or gel thicker and therefore seem richer. Sodium laureth sulphate is a less harmful form, but both damage hair follicles and cause hair loss.
They also harm the eyes, stinging is nature’s way of warning you. Tests show fetuses subjected to these substances do not develop functioning eyes, and they are implicated in the formation of cataracts in adults. Propylene glycol – antifreeze – is a known skin irritant and is thought to cause mouth ulcers and even oral cancer when used in mouthwash. It also damages the kidneys and liver. But that is in some shampoos! Most of the chemicals we put on our skin are readily absorbed into the body, especially nitrates. One study showed that one shampooing can put more nitrate into your blood than eating a pound of bacon".
Read much more about frequent washing dangers on this same site.
I’m English and live in Mexico where there is a lot of poverty so the poor simply don’t have hair loss problems as they can only wash hair (and body) infrequently. Also many men here oil hair or use oil dressing and wash infrequently. So you do not see the same hair loss.
I started suffering from hair loss in my twenties and despite genetic factors indicating total baldness was my fate, I
experimented to try to find what could halt and reverse hair loss using solely natural methods and have had remarkable results. Also stopped using harmful shampoos, found alternaives to washing , and only washed if absolutey necessary. I now have a full head of natural, healthy, thick, healthy hair and healthy scalp. Go to my profile and see the answers related to hair, hair loss, baldness, and other disorders. Many are Best Answers. Some have responded that despite their genetic tendencies, they tried treatments and also totally reversed loss and grew new hair.

Source(s): over 20 years of research into natural treatments of skin, hair and scalp disorders