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A potential problem is that vegetarian diets lacking eggs or generous amounts of edible seaweed generally lack a direct source of long-chain O3FAs such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Vegetarian diets may also have a high ratio of omega-6 fatty acids to O3FAs, which inhibits the conversion of short-chain fatty ...
Vegan diets tend to be higher in dietary fiber, magnesium, folic acid, vitamin C, vitamin E, and phytochemicals; and lower in calories, saturated fat, iron, cholesterol, long-chain omega-3 fatty acids, vitamin D, calcium, zinc, and vitamin B 12. [2] Researchers agree that those on a vegan diet should take a vitamin B 12 dietary supplement. [1] [3]
An omega−3 fatty acid is a fatty acid with multiple double bonds, where the first double bond is between the third and fourth carbon atoms from the end of the carbon atom chain. "Short-chain" omega−3 fatty acids have a chain of 18 carbon atoms or less, while "long-chain" omega−3 fatty acids have a chain of 20 or more.
According to Mount Sinai, the American diet typically has 14 to 25 times more omega-6 fatty acids than omega-3 fatty acids. ... It’s best to include a variety of omega-3 sources in your diet.
Western vegetarian diets are typically high in carotenoids, but relatively low in omega-3 fatty acids and vitamin B 12. [71] Vegans can have particularly low intake of vitamin B and calcium if they do not eat enough items such as collard greens , leafy greens , tempeh and tofu (soy). [ 72 ]
Mammals are unable to synthesize omega−3 fatty acids, but can obtain the shorter-chain omega−3 fatty acid ALA (18 carbons and 3 double bonds) through diet and use it to form the more important long-chain omega−3 fatty acids, EPA (20 carbons and 5 double bonds) and then from EPA, the most crucial, DHA (22 carbons and 6 double bonds). [2]
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