Collagen supports every joint in our body and improves elasticity of the skin (helping those wrinkles!), so it makes sense to include collagen in your daily diet. An easy and inexpensive way to do this is good old fashioned jelly with added gelatin. 
Add 4 tablespoons of gelatin powder to 2 packets of jelly crystals in 3 cups of boiling water. Mix it well (a stick blender does this well). Pour into a 20cm x 20cm cake tin. Set in the fridge, then cut into portions the size of an ice cube.

Eat 1 cube morning and night. Improvement should be noticeable in 3 to 6 months.