The body makes its own collagen, through a process referred to as collagen synthesis.
For this to occur, the body needs a variety of amino acids, such as glycine, proline and hydroxyproline.2
There are many types of collagen. Type I is found in skin, bones and teeth. Type II, meanwhile, is found in cartilage and Type III is found in the skin, muscle and blood vessels.3
On the market though, the main two forms of collagen are marine and bovine collagen.
Marine collagen is a type of collagen protein that is sourced from fish and other sea life such as jellyfish.
It is known to have a high collagen content. It is also absorbed well by the body and is considered eco-friendlier and more sustainable than other collagen sources.4
Bovine collagen comes from cows. It can help with joints and support the growth of hair and nails.
While gelatin is not technically classed as collagen, it is a collagen derivative, extracted from animal bones.