The role collagen plays is to help tissue withstand stretching. It gives strength to hair and nails, elasticity to skin and keeps joints and tendons strong. In addition, collagen can help improve gut health, heal wounds, and increase muscle mass/help with pre and post workout recovery. If you want these things you might want to consider adding a collagen supplement to your health regime.
Here's what coach Al uses:
Liquid option: Collagen Elixir from Isagenix
Powder option: The Bulletproof brand has several quality collagen supplements to choose from (Al adds the collagen protein into her coffee.)