The 4 Foods Dermatologists Want You to Avoid—and 8 They Want You to Start Eating

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Foods high on the glycemic index release glucose rapidly, which could affect your blood sugar levels. Some people might consume high-glycemic foods for energy recovery after exercise or to avoid hypoglycemia, according to Harvard Health Publishing. But in some cases, these foods might be bad for your skin. "In general, a high-glycemic-index diet can wreak havoc on the skin, promoting acne in certain individuals and contributing to general systemic inflammation, which can thereby lead to premature aging," says Karen. On the flip side, a study in 2007 in the American Journal of Clinical Nutrition found that there may be a link between a low-glycemic diet and an improvement in acne.

Examples of high-glycemic foods include white-wheat bread, whole-wheat bread, watermelon, potatoes, and honey. That doesn't mean you have to say goodbye to these foods completely, as most experts recommend it's best to keep a balanced diet, but you might want to limit and monitor your intake.

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"Fatty and greasy foods, as well as those high in processed sugar,  should be minimized," Karen recommends. This makes sense because a lot of these foods are high on the glycemic index, like chips or fries. Badreshia-Bansal agrees, adding that sugars and fried foods can worsen acne.

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"Dairy products have been linked to acne flares in some, but not all, prone individuals," Karen says. The American Academy of Dermatology states that there are studies that show a weak link between dairy products and acne, but some studies found that dairy consumption played a part in acne severity in some study participants. Bottom line? Check with your dermatologist to see if there's a correlation between the two—this might be where the food diary will come in handy.

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Badreshia-Bansal adds that spicy foods, along with alcohol and caffeine, can cause vasodilation (widening) of blood vessels, which could cause a rosacea flare-up in some people. For those who experience rosacea, you might want to keep a food diary, too, to see if there's a link.

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This is one food we'd gladly add to our eating plan—it's delicious. "Salmon offers a lean source of protein and is also rich in omega-3 fatty acids, known to be beneficial to the health of the heart and skin alike," says Karen. Other foods with omega-3s that Badreshia-Bansal recommends include nuts and avocados.

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"In general, eating a clean and plant-based diet with fresh fruits and vegetables is healthier, as they are full of fiber, low-fat, and low-sugar, thus stabilizing insulin levels. Spikes in insulin can also cause acne," says Badreshia-Bansal. She recommends adding green, leafy vegetables to your shopping list.

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"Red peppers and citrus fruits are tremendous sources of vitamin C, which not only is a powerful antioxidant but also an essential precursor to collagen production, which promotes skin thickness and health."

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"Foods rich in antioxidants can be very helpful at promoting skin health. We know there is a great benefit to topical application of antioxidants—specifically neutralizing free radicals that result from UV and pollutant exposure," says Karen. Some antioxidants include green tea, blueberries, and tomatoes (which are rich in the powerful antioxidant lycopene).

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Badreshia-Bansal says probiotics, like kimchi and miso soup, can contribute to good skin. The American of Academy of Dermatology states that recent studies and research have shown that probiotics can improve acne or rosacea but advises people to check with their dermatologist first before they load up on these foods.

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If you have a history of rosacea, you might not want to indulge since red wine might contribute to a flare-up, but in other cases, it might promote skin health. "Red wine contains resveratrol, a potent antioxidant that is healthy for the skin and the heart when consumed in moderation," Karen says.

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Another one that might worsen rosacea for some people, coffee also has some good skin benefits. Karen says it can promote efficient circulation to the skin and improve skin health, and it also has antioxidant properties.

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There's nothing better than good ol' H20. "The importance of staying adequately hydrated to maintain cellular function and healthy, supple skin cannot be overstated," Karen says.

Next up: Steer Clear of These 12 Popular Foods, According to a Gut Expert

This article was originally published at an earlier date and has since been updated.