Editor’s Note: This article was originally published in 2018 and is preserved for historical interest. Some recommendations, regulations, and scientific evidence have changed since it was written. It reflects the research and perspectives available at that time.

TL;DR:

Collagen provides important building blocks for the gut lining, skin, joints, bones, and muscles. Studies show collagen peptides are absorbed into the bloodstream and may support connective tissue health throughout the body. Regular intake may be helpful as natural collagen production declines with age.

Why Collagen Matters as We Age

Collagen is the main protein that gives structure to your:

  • Skin
  • Joints
  • Bones
  • Muscles
  • Gut lining

As we get older, the body makes less collagen. This can affect skin firmness, joint comfort, digestion, and muscle strength.

How Collagen Is Used in the Body

When you take collagen, it is broken down into small pieces called peptides. Studies show these peptides appear in the blood within an hour after eating them. This means the body can absorb and use them.

Because collagen turns over every day, regular intake may help support tissues that need constant repair.

Collagen and the Gut Lining

The gut lining is made partly of connective tissue. Collagen provides amino acids like glycine and proline that help support the structure of the intestinal wall. The FASEB Journal 1 April 2016. 125.5

Bone broth, which naturally contains collagen, has long been used as a traditional food to help maintain gut lining integrity.

Collagen for Skin

Collagen is a major part of the skin’s structure. Research suggests collagen supplementation may help support:

  • Skin elasticity
  • Skin hydration
  • Skin smoothness

These effects may help counter some visible changes of aging.

Collagen for Joints and Bones

Collagen is found in cartilage and bone. Studies suggest collagen peptides may help support:

  • Joint comfort
  • Joint flexibility
  • Bone strength

This is especially important as natural collagen levels decline with age.

Collagen and Muscle

Collagen provides amino acids that help support muscle tissue. Some research suggests collagen supplementation, especially along with exercise, may help support healthy muscle mass in older adults.