Functional foods are ingredients that offer health benefits that extend beyond their nutritional value. Some types contain supplements or other additional ingredients designed to improve health.
Some examples include foods fortified with vitamins, minerals, probiotics, or fiber. Nutrient-rich ingredients like fruits, vegetables, nuts, seeds, and grains are often considered functional foods as well.
berries, kiwi, pears, peaches, apples, oranges, bananas
broccoli, cauliflower, kale, spinach, zucchini
salmon, sardines, anchovies, mackerel, cod
chia seeds, flax seeds, hemp seeds, pumpkin seeds
black beans, chickpeas, navy beans, lentils
almonds, cashews, pistachios, macadamia nuts, Brazil nuts
oats, barley, buckwheat, brown rice, couscous
tempeh, kombucha, kimchi, kefir, sauerkraut
turmeric, cinnamon, ginger, cayenne pepper
coffee,
green tea,
black tea
 
According to Dermatolgist Skin type is the most important factor in determining what skin care products will work best for you, sometimes people with different skin types use the wrong product for their type of skin.
Look for products containing alpha hydroxy acids (glycolic acid or salicylic acid),
Look for products containing shea butter and lactic acid.
Look for products containing aloe vera, oatmeal, and shea butter.