kannattaa syödä C-vitamiinia sekä vähän hiilihydraatteja ja huonoja rasvoja.
Vitamin C, linoleic acid linked with younger-looking skin
A report published in the October, 2007 issue of the American Journal of Clinical Nutrition revealed the findings of UK researchers that women who consume higher amounts of vitamin C and linoleic acid have younger looking skin than women whose intake of these nutrients is low. On the other hand, greater intake of fat and carbohydrates were associated with older looking skin.
Maeve C. Cosgrove and associates at Unilever, Bedford utilized data from 4,025 women between the ages of 40 and 74 who participated in the first National Health and Nutrition Examination Survey (NHANES). Dietary questionnaires completed by the participants were analyzed for macronutrient, fatty acid, vitamin, and mineral intake. Clinical examinations of the skin evaluated wrinkling, dryness and skin atrophy (thinness) as signs of aging. Lifetime sun exposure was classified as low, moderate or high based on occupation and time spent outdoors.
Analysis of the data determined that having a higher intake of vitamin C was associated with a reduced likelihood of a wrinkled and dry appearance, and a greater intake of linoleic acid was linked with less dryness and skin atrophy. Increased fat and carbohydrate intake was determined to increase the risk of skin wrinkling as well as atrophy.
The study is the first, to the author's knowledge, to directly relate vitamin C intake with skin aging. Vitamin C is involved in collagen synthesis, skin regeneration, and wound repair, as well as having an antioxidant action which may be responsible for the benefits observed in this study. Linoleic acid's benefits may arise from its conversion to omega-3 fatty acids EPA and DHA.
The authors suggest that "Perhaps appealing benefits such as reducing skin-aging appearance may motivate healthy eating, and new campaigns to promote healthy dietary behaviors could consider this issue."