Foods You Should Never Peel: Keep These Nutritious Skins On
Peeling fruits and vegetables is a normal part of food preparation, but removing the skin is not always necessary. In fact, some produce skins contain valuable fibre, vitamins and plant compounds that can contribute to a healthy diet.
Nutrition experts say that many common fruits and vegetables can safely be eaten with their skins, provided they are washed properly first. Keeping the peel on can also reduce food waste and make cooking easier.
Apples and Pears
Apple and pear skins are among the easiest peels to keep. Their skins provide fibre and antioxidants, including quercetin, a plant compound being studied for its potential health benefits.
Rather than automatically reaching for a peeler, simply wash the fruit thoroughly under running water and enjoy it whole.
Potatoes and Sweet Potatoes
Potato skins provide fibre and potassium, making them worth keeping when roasting or baking. Sweet potato skins can also be eaten and add extra nutrients and texture.
However, there is an important safety exception. Potatoes that have become extensively green or heavily sprouted can contain elevated levels of glycoalkaloids, particularly in the peel and green areas. Such potatoes should not simply be treated as normal produce.
For many people, peeling carrots is mainly a matter of texture or appearance rather than food safety. Keeping the outer layer can also save preparation time and reduce kitchen waste.
Cucumbers
Cucumber skin is edible and provides additional fibre and vitamin K. If the cucumber has a waxy surface, wash and scrub it well before eating.
Keeping the skin can also help cucumbers maintain their characteristic crunch, particularly when they are used in salads and sandwiches.
Eggplant
Eggplant skin is completely edible and contains antioxidant compounds, including nasunin. Smaller, younger eggplants tend to have tender skins that work particularly well in roasted or cooked dishes.
Older or very large eggplants may develop tougher skin, so peeling them can sometimes improve the texture of the finished meal.
Zucchini and Yellow Squash
There is usually no reason to peel zucchini or yellow squash. Their thin skins soften during cooking and contribute colour, texture and nutrients.
Simply rinse the vegetables, trim the ends and slice or cook them as required.
Peaches, Nectarines and Plums
The skin of peaches, nectarines and plums is edible and contributes fibre and antioxidants. Their skins can be especially useful when the fruit is eaten fresh, sliced into yoghurt or added to salads.
A thorough rinse before eating is important.
Kiwi
Kiwi skin may look unusual because of its fuzzy texture, but it is edible and contains additional fibre and vitamin C.
Some people prefer to remove the fuzz or blend the whole fruit into a smoothie. People with kiwi allergies or certain oral allergy or latex-fruit sensitivities should be more cautious because kiwi can cause itching or tingling in susceptible individuals.
Not Every Peel Should Be Eaten
Keeping the skin on is not a rule that applies to every fruit and vegetable.
Banana peel is technically edible when cooked but is generally unpleasant raw. Mango skin is also edible in a technical sense, but it can be bitter and may cause reactions in people sensitive to urushiol.
Cantaloupe and honeydew rinds are also best avoided. Watermelon is different: the white inner rind can be eaten when properly prepared, although the tough green exterior is normally removed.
Always Wash Produce Before Eating the Skin
If you plan to eat a fruit or vegetable with its skin, washing it properly is essential.
Firm vegetables such as carrots, potatoes and cucumbers can be scrubbed with a clean produce brush.
Importantly, produce should still be washed even when you intend to peel it. Cutting or peeling unwashed produce can transfer bacteria and dirt from the outside surface onto the edible flesh.
Avoid washing fruits and vegetables with soap or detergent. Plain running water and appropriate scrubbing are generally recommended for household produce cleaning.
The Bottom Line
Peeling is not always the healthiest or most necessary step in preparing fruits and vegetables. Apples, pears, potatoes, carrots, cucumbers, eggplant, zucchini, peaches, plums and kiwi are examples of produce whose skins can be eaten when properly washed and suitable for consumption.
Keeping edible skins on can add fibre and plant compounds to meals while reducing food waste. However, some peels are unpleasant, difficult to digest or unsuitable to eat, so it is important to know the difference.
The simplest approach is to wash produce thoroughly, keep edible skins when you enjoy them, and peel or discard skins that are tough, unsafe or unpalatable.
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