Products must be pH balanced for the skin and hair. Acidity increases as the pH number decreases, and alkalinity increases as the pH number increases. Usually the pH of a cosmetic will not change the natural pH of the hair or skin because the hair and skin contain keratin, fatty acids and other substances that adjust the pH levels with which they come into contact. Naturally, the high pH of cold wave solutions and hair-straighteners can damage the hair and skin, but even this is rare providing a proper conditioner or moisturizer is used after such pH alternations. Promoted for rejuvenating and nourishing aging skin.
Placental extracts are another big hype.
In moisturizers, these ingredients allegedly supplement the vitamin and hormone content. The manufacturers of these products take advantage of the belief that since the placenta nourishes the developing embryo, an extract of it can nourish and rejuvenate aging skin. Temporary means temporary, but it's still nice, every now and then, to be able to get a smoother look. Worst yet, many may come from aborted fetuses or might not be properly sanitized. Being promoted as being a beneficial humectant.