A major aspect of the Ray Peat diet is reducing your consumption of polyunsaturated fats, found in some vegetable oils including safflower oil, sunflower oil, corn oil, soybean oil and Canola oil. If you're using any of those oils, or any other oil high in polyunsaturated fats, get rid of them.
A high intake of polyunsaturated fats speed up aging because these fatty acids can degrade into oxidative byproducts which damage your body.
Ray Peat wrote:In a study at the University of California, photographs of two groups of people were selected, pairing people of the same age, one who had eaten an unsaturated fat rich diet, the other who had eaten a diet low in unsaturated fats. A panel of judges was asked to sort them by their apparent ages, and the subjects who consumed larger amounts of the unsaturated oils were consistently judged to be older than those who ate less, showing the same age-accelerating effects of the unsaturated oils that were demonstrated by the rabbit experiments.
Reducing your consumption of polyunsaturated fats is especially important if you're tanning, as tanning exacerbates the skin aging associated with high polyunsaturated fat consumption. Rabbit experiments have shown that skin ages much faster if their diet is high in polyunsaturated fats.
Ray Peat wrote:In the l960s, Hartroft and Porta gave an elegant argument for decreasing the ratio of unsaturated oil to saturated oil in the diet (and thus in the tissues). They showed that the "age pigment" is produced in proportion to the ratio of oxidants to antioxidants, multiplied by the ratio of unsaturated oils to saturated oils. More recently, a variety of studies have demonstrated that ultraviolet light induces peroxidation in unsaturated fats, but not saturated fats, and that this occurs in the skin as well as in vitro. Rabbit experiments, and studies of humans, showed that the amount of unsaturated oil in the diet strongly affects the rate at which aged, wrinkled skin develops. The unsaturated fat in the skin is a major target for the aging and carcinogenic effects of ultraviolet light, though not necessarily the only one.
Polyunsaturated fats also inhibit thyroid function and cause weight gain.
Important information on the Ray Peat diet.
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