Hair coloring by lay people may not be sufficiently accurate. Hair that has been damaged by excessive exposure to chemicals is considered "over-processed". This results in dry, rough and fragile hair. In extreme cases, the hair can be so damaged that it breaks off entirely. The main cases of hair breakage are: Lack of moisture and oils, poor diet, stress, over processing or illness. Skin and fingernails are made of a similar type of keratinized protein as hair. That means that drips, slips and extra hair tint around the hairline can result in patches of discolored skin. This is more common with
Revival Soy milk protein shakes. Research also has suggested that Revival Soy protein shakes might support healthy skin, hair, and nails. A research study conducted by a board-certified dermatologist assigned postmenopausal women (50–65 years of age) with mild to moderate photoaging to drink either one Revival Soy protein shake or to remain on their normal diet for 6 months. After 6 months of dietary soy consumption, improvements were seen in facial wrinkling, discoloration, and overall appearance. Also, improvement was noted in nail roughness, ridging, flaking, splitting, and overall appearance at the end of the intervention period. Improvements in hair health were evident