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Nutrition

Nuts contain the diverse nutrients that are needed for the growth of a new plant. Composition varies, but they tend to have a low water and carbohydrate content, with high levels of fats, protein, dietary minerals, and vitamins. The digestibility of the protein at about 90% is slightly lower than that of meat and fish, but can be improved by chewing thoroughly. The fats are largely unsaturated and nuts are a source of essential omega-3 fatty acids. As part of a healthy human diet, long-term consumption of diverse nutrients in nuts may contribute to a lower risk of cardiovascular diseases, reduced levels of blood cholesterol, and lower all-cause mortality. For vegetarians and vegans, nuts provide many of the essential nutrients which may be in short supply in other plant foods.

Nuts supply nutrients for humans and wildlife. Because nuts generally have a high oil content, they are a significant energy source. Many seeds are edible by humans and used in cooking, eaten raw, sprouted, or roasted as a snack food, ground to make nut butters, or pressed for oil that is used in cooking and cosmetics. Regular nut consumption of more than 5 ounces (140 g) per week may benefit weight control and contribute to lowering body weight in humans.