Keto Means
Keto Means
Photo: Alex Green
Peels are packed with nutrients In fact, a raw apple with skin contains up to 332% more vitamin K, 142% more vitamin A, 115% more vitamin C, 20% more calcium, and up to 19% more potassium than a peeled apple ( 1 , 2 ).
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Read More »There’s no arguing that eating more fruits and vegetables can benefit your health. However, whether these fruits and vegetables are best consumed with or without skin is often up for debate. Peels are often discarded due to preference or habit or in an attempt to reduce exposure to pesticides. However, removing the peels may mean removing one of the most nutrient-rich parts of the plant. This article takes a look at the science to determine whether fruit and vegetable peels are best removed or not. Peels are packed with nutrients Share on Pinterest Esseffe/Getty Images Peels are packed with beneficial nutrients. The amounts of nutrients they contain vary based on the type of fruit or vegetable. However, generally speaking, unpeeled produce contains higher amounts of vitamins, minerals, and other beneficial plant compounds than peeled produce does. In fact, a raw apple with skin contains up to 332% more vitamin K, 142% more vitamin A, 115% more vitamin C, 20% more calcium, and up to 19% more potassium than a peeled apple ( 1 , 2 ). Similarly, a boiled potato with skin can contain up to 175% more vitamin C, 115% more potassium, 111% more folate, and 110% more magnesium and phosphorus than a peeled one ( 3 , 4 ). Vegetable peels also contain significantly more fiber and antioxidants. For instance, up to 31% of the total amount of fiber in a vegetable can be found in its skin. What’s more, antioxidant levels can be up to 328 times higher in fruit peels than in pulp ( 5 , 6, 7). Therefore, eating your fruits and vegetables unpeeled can truly increase your nutrient intake. Summary Fruit and vegetable peels are rich in several nutrients, including fiber, vitamins, minerals, and antioxidants. Consuming the peel with the pulp can boost your total intake of these nutrients. Peels may help you feel fuller longer Fruit and vegetable peels can reduce hunger and help you feel fuller longer. This is largely due to their high fiber content. While the exact amount of fiber varies, fresh fruits and vegetables may contain up to one-third more fiber before the outer layers are removed (6). Several studies show that fiber can help you feel fuller longer. Fiber may do this by physically stretching the stomach, by slowing how quickly it empties, or by influencing the speed at which fullness hormones are released in your body ( 8 , 9). In fact, research shows that the type of fiber found in fruits and vegetables, which is known as viscous fiber, may be especially effective at reducing appetite ( 10 ). Fiber also serves as food for the friendly bacteria living in your gut. When these bacteria feed on fiber, they produce short-chain fatty acids, which appear to further boost feelings of fullness (11, 12). Moreover, several studies have observed that fiber-rich diets tend to reduce hunger and, therefore, the number of calories consumed per day, potentially leading to weight loss ( 13 ). Therefore, unpeeled fruits and vegetables may help you reduce your hunger and even lose weight. Summary Due to their high fiber content, fruit and vegetable peels may help reduce hunger and keep you feeling fuller longer. Peels may help prevent some diseases Fruits and vegetables contain antioxidants, which are beneficial plant compounds that may reduce the risk of several diseases. Put simply, the main function of antioxidants is to fight unstable molecules called free radicals. High levels of free radicals can cause oxidative stress, which can ultimately harm cells and potentially increase the risk of disease. In fact, researchers believe that antioxidants may help lower the risk of heart disease and certain types of cancers ( 14 , 15 , 16 ). Certain antioxidants found in fruits and vegetables have also been linked to a lower risk of neurological diseases such as Alzheimer’s disease ( 17 ). Fruits and vegetables are naturally high in antioxidants, but according to research, the antioxidants appear to be more concentrated in the outer layer ( 18 ). In one study, antioxidant levels were up to 328 times higher in fruit and vegetable peels than in their pulps (7, 19 ). Therefore, if you want to maximize your intake of antioxidants from fruit and vegetables, you should eat them unpeeled. Summary Eating unpeeled fruits and vegetables may result in a higher intake of antioxidants. This may help prevent free radical damage and ultimately reduce your risk of certain diseases.
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Read More »Some peels are hard to clean or inedible Certain fruit or vegetable peels may be hard to consume or simply inedible. For instance, the peels of avocados and honeydew melon are considered inedible, regardless of whether they are consumed cooked or raw. Other fruit and vegetable peels, such as those from pineapples, melons, onions, and celeriac, can have a tough texture that is difficult to chew and digest. These peels are generally best removed and not eaten. Furthermore, while some vegetable peels are considered edible, they are not very appetizing for most when raw. Examples are winter squash and pumpkin peels, which are best consumed after cooking to allow the peels to become soft. Citrus fruits also have tough and bitter skins that can be difficult to consume raw. These are generally best consumed as a zest or cooked, or simply discarded. Some fruit and vegetable peels, although completely edible, may have a bitter taste or be coated with a layer of wax or dirt that can be particularly hard to remove. If the idea of eating these fruits and vegetables with skin makes you not want to eat them at all, peeling may remain your best option. Summary Certain peels may be inedible, hard to digest, or difficult to clean or have a tough texture. In such cases, peels may be best removed and not eaten. Peels may contain pesticides Pesticides are commonly used to reduce crop damage and increase yield. Contrary to popular belief, pesticides can be found on both organically and conventionally grown fruits and vegetables (20). Although some pesticides enter fruit and vegetable flesh, many remain confined in the outer peel ( 21 ). Washing is a good way to get rid of pesticide residues that are loosely attached to the peel’s surface. However, peeling is the best way to remove pesticides that have seeped into fruit and vegetable skin ( 22 ). For example, a recent review reports that around 41% of pesticide residues found on fruits was removed by washing with water, while up to twice as much was removed through peeling ( 23 ). For many people concerned about their overall exposure to pesticides, this may be good enough reason to eat only the flesh of all fruits and vegetables. Those particularly worried about their pesticide intake may want to check out the EWG’s report, which ranks pesticide contamination levels in 48 popular fruits and vegetables in America. Nevertheless, the risk of consuming slightly more pesticides may not necessarily outweigh the benefit of the greater amount of nutrients in the skins. The amount of pesticides allowed on fresh foods is tightly regulated. Pesticide levels exceed the allowed upper limits in less than 4% of cases, and even when they do, research shows this rarely results in harm to humans ( 24 ). Therefore, while removing the skin of vegetables may get rid of a bit more pesticides than washing does, the difference is likely too small to worry about. Summary Pesticide levels in fresh produce are tightly regulated. While peeling fruits and vegetables appears to be a slightly more effective way to remove pesticides than washing alone, the difference is likely too small to make a true difference. Which peels are safe to eat? Some peels are safe to eat, while others may not be. The lists below provide summaries of which common fruits and vegetables should be peeled and which do not have to be. Inedible peels: avocado
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