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Omega-3 fatty acids, like those found in oily, cold water fish like salmon, sardines and herring, are vital to the function of your cells and your brain. Not only are they good for your skin, but studies have indicated that including a healthy amount of omega-3s in your diet may prevent or delay the onset of dementia. Two servings a week should do it. Try to avoid large species of fish like swordfish and tuna. The larger the fish, the more environmental toxins it consumes, and therefore, you will consume.
Toxins such as mercury and other heavy metals could age you prematurely and lead to the onset of autoimmune diseases. If you don't like fish, consider a quality fish oil supplement. If you're a vegetarian, or allergic to fish, go to www.womentowomen.com for some alternative ways to get those all-important omega-3s.