Collagen is a protein found in connective tissues throughout your body. It is located in your skin, bones, tendons, and ligaments. Its primary function is to help tissues withstand stretching.
While results are promising, more research is needed to fully understand whether or not supplementation is effective.
This article discusses the potential benefits and possible side effects of collagen supplements. It also explains how to take collagen and what to look for in collagen products.
Does Collagen Have Any Benefits?
· Collagen supplements claim to combat the effects of aging by:
· Firming up skin
· Fighting age-related damage
· Boosting bone health
Here are some findings from the available research.
Skin
Collagen makes up 75% of the dry weight of your skin. As you age, your skin's inner layer loses collagen and becomes less elastic and more vulnerable to damage.
Studies on collagen's impact on the skin include:
Hydration: In a 2015 study, scientists evaluated if supplementation could improve skin tissue in a lab setting. Their results suggested that supplements could improve skin hydration and the skin's collagen network. In addition, collagen also showed the potential to improve aging skin.
Elasticity: Skin elasticity starts to decline in your 20s. Some studies have focused on whether collagen supplements can help with this. In a 2014 study in Skin Pharmacology and Physiology, women ages 35 to 55 took either a collagen supplement or a placebo once daily for eight weeks. At the study's end, those who took the collagen had improved skin elasticity compared to those who took the placebo.
Hydration and elasticity: A 2018 study published in Nutrition Research investigated the role of a specific brand of oral collagen supplement. This supplement also contained joint-supporting ingredients, including chondroitin sulfate, glucosamine, L-carnitine, and other vitamins and minerals. The research showed the supplement increased skin elasticity and hydration.
Wound healing and aging: Lastly, a 2019 review of studies evaluated collagen supplements' effects on wound healing and skin aging. The study authors concluded that supplements are generally safe and can increase skin elasticity, hydration, and density. They added, however, that further studies are needed to determine proper dosing and determine medical applications.
Bone Health
Studies on collagen supplements' impact on postmenopausal bone health are conflicting. So, it is unclear whether collagen supplements can improve bone health.
Study findings include:
No effects on bone health: In a 2010 study published in Maturitas, researchers found that collagen supplements did not improve bone health in postmenopausal people. For the study, 71 women with osteopenia (low bone density) took either collagen supplements or a placebo every day for 24 weeks. Results revealed that the collagen supplements did not produce any effects on bone metabolism.
Increased bone mineral density: A 2018 study published in Nutrients concluded that the intake of a specific collagen supplement brand increased bone mineral density in postmenopausal women. In addition, the study concluded that supplementation might increase bone formation and reduce bone loss.
Body Composition:
Some people may take collagen to preserve muscle or decrease fat. However, studies on this are limited and have provided mixed results. Among them:
Muscle: A 2019 study published in Nutrients investigated if collagen supplements combined with resistance training could affect the proportion of fat to non-fat in your body (body composition) in active men. A 12-week program with 57 participants combined resistance training with either a collagen supplement or a placebo. Researchers found that both groups increased muscle to the same extent. However, those who took a collagen supplement showed a slight increase in fat-free mass. This was thought to be related to improvements in connective tissue.
Lean body mass: Another small trial compared hydrolyzed collagen protein supplements to whey protein supplements in older women. The 2009 study published in the Journal of the American Dietetic Association found that taking hydrolyzed collagen supplements may help maintain lean body mass.
Joint Pain
Collagen helps stimulate the production of cartilage, a rubbery material that covers and protects bones and helps joints move smoothly. Production of both of these declines with age.
There is some evidence that collagen supplements may reduce joint pain and other symptoms of osteoarthritis.
Heart Disease
Some people take collagen supplements to boost heart health, although there is limited independent research to support this.
Researchers affiliated with a Japanese company that makes collagen-based functional foods published a study in 2017. They concluded that when taken regularly for six months, collagen tripeptide offered heart benefits, including:
Improved cholesterol levels
Reduction of other risk factors for atherosclerosis.
Other Uses
Some people also take collagen supplements to improve other aspects of their health, including:
· Eye health
· The appearance of skin and nails
· Weight reduction
· Possible Side Effects
If you decide to use one, consider choosing a product that has been certified for quality by a third party, such as USP. In doing so, you can at least ensure that what's on the label is exactly what you're getting in the bottle.
Certain people should avoid collagen supplements unless they are used under the careful guidance of a qualified healthcare provider. These groups include:
· Those with medical conditions
· Those who are taking medications
· Children
· Pregnant people
· Breastfeeding people
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