Bryan said:
Scalp and hair have no known or proven use whatsoever for oil or sebum.
True statement!
My ex-girlfriend worked for a dermotologist, he said the same thing. Well, more specifically he focused more on skin oils, saying this phenomenon of 'non-drying' facial cleansers was nothing but a load of bull used by grocery product makers to sell high priced facial soap.
First off, myth number one... dry skin causes wrinkles. WRONG. Wrinkles are caused by the ageing process triggering facial skin to 1) hold less fat, which makes skin 'thinner' looking, and 2) produce less quantities of certain firming proteins. The biggest cause of wrinkles is sun exposure, as the radiation damages structures beneath the skin that keep it firm, as well as the known cancer risks.
'Non-soap, moisturizing' facial washes are loaded with lipids, or fat. The fat 'puffs up' the semi-dead layer of skin on the surface and makes it look smoother, but underneath that, the fat actually accelerates the clogging of pores and reduces the skin's ability to expel toxins.
He says that using soap does strip the skin of oils, but in his opinion it was far MORE important to use a real soap that would clean these oils OFF of the face, as these oils contain dirt, pollutants, and excreted toxins that collect in them during the course of the day. Failure to clean these substances off inhibits the skin's ability to excrete toxins, and is terrible for your skin on the long term.
If you want to save your youthful skin, don't waste money on expensive facial washes or moisturizers... instead, use a simple non-comedegenic SPF20 sunscreen or better moisturizer, EVERY day.