Berries like strawberries, blueberries, or blackberries are full of vitamin C, an important contributor to collagen production in the body.

Another vitamin C-rich food is broccoli. Take your broccoli however you like it and boost collagen. 

Fishes like sardines are a great way to increase collagen production as they have collagen-concentrated bones, skins, and scales. 

Also a rich source of vitamin C, amla is helpful for collagen boost and improves metabolism and immunity.