Wel grappig dat het hier ook over sebum (talg, vet op hoofdhuid) gaat. Wat dus de follikels aantast.
Recently, a group of Japanese researchers reported a correlation between excessive sebum in the scalp and hair loss. Excessive sebum often accompanying thinning hair is attributed to an enlargement of the sebaceous gland. They believed excessive sebum causes a high level of 5-alpha reductase, the enzyme which converts testosterone into dihydrotestosterone (DHT), and pore clogging, thus malnutrition of the hair root and a shift into the resting phase.
Although this condition could be hereditary, they believe diet is a more likely cause. The researchers note that Japanese hair was thick and healthy, with a small gland and little scalp oil, until large amounts of animal fat crept into their diet after World War II. This change has led to a significant height increase in the Japanese population, but it has also resulted in more Japanese men losing hair. To some extent, their observation makes sense: problems with greasy hair have often been noted as much as six months to a year prior hair thinning becoming noticeable. However, this might just be one of the symptoms instead of an underlying cause, so more research is needed.
Most doctors agree that if you have a oily scalp with thinning hair, frequent shampooing is advised. Shampooing can reduce surface sebum, which contains high levels of testosterone and DHT that may reenter the skin and affect the hair follicle.
Specific foods or vitamins don't regrow hair, although good nutrition is essential for healthy hair.
Overigens geloof ik niet dat de zijkanten hierdoor minder kaal worden omdat het sebum dus aan de kussen wordt opgenomen, aangezien er maar weinig mensen volgens mij aan de zijkant slapen. En andere kant denk ik juist dat het drukken van kussen de talg/sebum meer dwingt om in het huid te gaan dan dat het geabsorbeerd wordt.
edit: oh ik zie dat diegene dezelfde artikel heeft genomen