Table 1. Summary of the food elements that should be included or avoided in a diet in a particular skin condition.

Disease	Gender & Age	Negative Foods	Positive Foods
Psoriasis	The overall estimated prevalence of psoriasis is similar between men and women. In women, psoriasis usually manifests at 16 to 22 years or 55 to 60 years. In men, these 2 peaks for age at onset occur more around 30 to 39 years and 60 to 79 years [5].	Gluten-rich foods and foods rich in vitamin A	Fish oil supplementation (rich in omega-3 PUFAs, fresh fruits and vegetables such as carrots and tomatoes as they are high in carotenoids, flavonoides and vitamin C.
Alopecia areata	Women are more likely to develop alopecia areata than men. More than 80% show signs of the disease before age 40, and 40% experience symptoms by age 20 [13].	Gluten-containing foods, dairy products, ultra-processed foods, fried foods, and food and drinks with added sugars.	Gluten-free diet high in raw vegetables, soy, and protein, whole grains, legumes, and fruits such as citrus, cherries, apples, berries and grapes.
Pemphigus	Pemphigus foliaceus typically impacts both men and women at similar rates, although in certain populations, it appears to affect women more frequently. While the usual age range for onset of symptoms is between 40 and 60 years old, in certain regions, manifestations of the disease may start during childhood [11].	Foods containing thiols, thiocyanates, phenols and taninssuch as garlic, cabbage, cauliflower, mustard, mango, banana, blackberry, coffee, tea, wine, beer, candy, and baked foods.	Fresh vegetables such as carrots and peas, cottage cheese, yogurt, fish, eggs, oatmeal, fruit and vegetable smoothies.
Vitiligo	Equal distribution in both genders and all ethnic groups. The disease can develop at any age. However, for many people with vitiligo, the white patches begin to appear before age 20 and can start in early childhood [16].	Butter, margarine, milk, milk products, red meat, desserts, sugar, soft drinks, potatoes.	Olive oil, corn, tomato, avocado, legumes, apples, onion, garlic, eggplant, berries, grapes.
Atopic dermatitis	AD is a prevalent condition among young adults, with a higher incidence in females than males by the age of 24. However, the onset of atopic dermatitis in adulthood appears to affect both sexes equally during young adulthood [22].	Wheat, milk, soy, fish, eggs, and peanuts.	Egg-free diet in infants, supplementation of probiotic intestinal bacteria.
Dermatitis herpetiformis	DH affects mostly adults and slightly more males than females. The mean age at onset is about 50 years [26].	Foodstuffs containing gluten such as wheat, rye, oats, and barley. Iodine-containing foods such as fish and iodized salt should be avoided. Additionally, vitamins should be avoided in patients who do not respond to a gluten-free diet.	Gluten-free diet, rice, corn, and potatoes.
Urticaria	Women are more affected by chronic urticaria. In most studies, the peak age of CU occurrence is between 20 and 40 years [29].	Foods with added ingredients such as salicylates, benzoates, and tetrazine. Avoid foods containing aromatic volatile ingredients such as herbs, tomatoes, and white wine.	Foods low in histamines such as most vegetables, fresh meat, fish like salmon, cod, and trout, dairy other than cheese and yogurt, bread, and rice.
Acne	Acne is more common in women than in men at all ages after age 20 years. Variations in the prevalence of the disease among different ethnic groups have also been reported [31].	Sugars, refined grains, fast food, chocolate, greasy food, whey protein powder, foods rich in Omega-6 Fats.	High-fiber foods such as oatmeal, beans, apples, carrots, salmon fish ( Omega-3 fatty acids) and nuts.
Scleroderma	It is more common in women than men. Most localized types of scleroderma show up before age 40, and systemic types of scleroderma are typically diagnosed between ages 30 and 50 [34].	Processed foods and foods with artificial ingredients, preservatives or hydrogenated oils. Foods containing sucrose, evaporated cane juice, fructose, brown rice syrup, molasses, corn syrup and lactose containing dairy products.	Whole wheat bread, cereals, barley, quinoa, oats, anti-inflammatory herbs and spices such as cinnamon, ginger paprika, turmeric, and curry leaves.