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The highest percentages of amino acids found within collagen, along with some of their key benefits, include:

Proline: Proline makes up almost 15 percent of collagen. Proline and glycine, in particular, play a major role in ensuring your body’s running smoothly. Proline helps to protect integrity of blood vessels, improve joint health and has various cardiovascular benefits (more on those below).

Glycine: around one-third of the protein found in collagen is glycine. While size-wise it’s the smallest amino acid, glycine has big effects. To ensure our cells function properly, glycine helps build healthy DNA strands. It’s also one of three amino acids that form creatine, which promotes healthy muscle growth and boosts energy production during workouts.

Glutamine: Considered to be one of the most important and abundant amino acids in the body, glutamine is both created within our muscles and also obtained from food sources. Research shows that glutamine has benefits for: preventing anxiety, tension, sleep disorders/insomnia, a lack of concentration, poor digestive health, a weakened immune system and low energy. According to a report printed the American Journal of Clinical Nutrition, it’s been shown to have positive effects of production of growth hormone which can improve aspects of mental health, such as helping with release of GABA that boosts feelings of “inner calm and tranquility”. Nitrogen, created by glutamine in high amounts, also helps with wound healing and prevents muscle wasting and joint pains.

Arginine: Arginine (also commonly called L-arginine) breaks down into nitric oxide within the body, which is an important compound for arterial and heart health.  Arginine has also been shown to improve circulation, help to strengthen the immune system and has a positive influence on male libido.