Collagen needs further study on the benefits to skin and joints.
Collagen is the body's most important building block and makes up about 30% of your protein weight. This is the key structural protein that ensures the elasticity, cohesion, and regeneration of the connective tissue.
The existing evidence in favor of collagen is actually limited. We do not really fully understand the complete array of benefits this protein has for your skin and joints. The most-complete research about the benefits of collagen has to do with how it helps joints. Since the early 1990s, studies already backed up collagen supplementation as a way to reduce symptoms of osteoarthritis and rheumatoid arthritis. In more recent studies, patients who took a daily 40 mg oral dose of undenatured type-II collagen (“UC-II”) experienced a 26% reduction in their pain by helping to reduce inflammation.
The effectiveness of collagen to help with arthritis and joint pain is still in question, but available results are strong enough to give it a try.
One of the mistakes that people assume and makes nutrition scientists cringe, is the thought that something that you swallow will turn into the same something somewhere else in your body. That is not really how biochemistry and digestion work.
According to professionals, if you orally consume collagen, it is going to be digested by your GI tract. Evidence seems to back up this.
How does collagen help the skin? There are some studies that link some collagen peptides to healthier skin and reduced skin wrinkles. However, right now, there are a lot more questions than answers.