Collagen Foods

Collagen is part of the connective tissue found all over our bodies and is made from protein and large amounts of two amino acids: hydroxylsine and hydroxyproline. While food doesn't contain collagen, eating a balanced diet that includes foods like legumes, fruit, vegetables, fish, nuts and other lean proteins helps promote collagen growth
Legumes, Nuts, and Seeds 

Eat legumes, in particular, peanuts,for a significant source of the amino acid lysine. Include chickpeas in your menus as a healthy source of zinc, copper and selenium, minerals needed for collagen production. Nuts like cashews, pecans, almonds and Brazil nuts contain healthy omega acids that promote collagen by creating an ideal environment for its production. Flaxseed is also an important source of omega-3.
Fruits
Satisfy your sweet tooth with deeply colored red and blue berries and fruits such as cherries, blueberries, blackberries, and raspberries. They've been shown to contain anthocyanidins that help link collagen fibers together and strengthen connective tissue. Red fruits have lycopenes which increase collagen production. Help your body produce collagen with vitamin C. Citrus fruits like oranges, grapefruits, lemons and limes are natural sources. Neutralize free radicals that break down the collagen in healthy skin tissues from the inside out with fruits high in antioxidants. For a serious antioxidant boost, add five or six prunes to your diet. 

Vegetables

Eat red, green and orange vegetables to boost your antioxidants and collagen production. Work vitamin A rich raw carrots and baked sweet potatoes in combination with sulphur rich green and black olives, fresh cucumbers, and celery to keep collagen levels high. Add at least 2 to 4 oz. daily of green leafy vegetables like spinach, collard greens , cabbage and kale to your diet to increase the level of the collagen-producing agent, lutein.
Proteins
Support your collagen tissue by eating a variety of proteins. Fish, lean meats, eggs, low-fat dairy products and nuts and seeds are sources of lysine and proline amino acids. Eat foods high in lysine and proline with vitamin C to convert them into their collagen forms. Get zinc, copper and selenium, the minerals required for collagen production from chicken, lean beef and oysters. Vegetarians getting their protein from soy products need not worry. Soy meat and dairy substitutes contain genistein which has collagen-producing qualities and blocks enzymes that break down and age skin.