Collagen has become one of the most talked-about ingredients in the wellness world. From powders and supplements to skincare products, collagen is often promoted as a way to improve skin, joints, and overall health. But what exactly is collagen, and do you really need more of it?
What Is Collagen?
Collagen is the most abundant protein in the human body, making up about one-third of the body’s total protein. It acts as a structural building block that helps hold the body together.
Collagen is found in many tissues, including:
Skin
Bones
Muscles
Tendons and ligaments
Blood vessels
Cartilage
Connective tissues
Think of collagen as a kind of natural scaffolding that provides strength, elasticity, and structure to the body. There are at least 28 types of collagen, but the majority in the human body falls into three main types:
Type I: Found in skin, bones, tendons, and ligaments.
Type II: Found in cartilage and supports joint health.
Type III: Found in skin, muscles, and blood vessels.
Together, these proteins help keep tissues strong, flexible, and resilient.
What Does Collagen Do for the Body?
Because collagen is found throughout the body, it plays many important roles in overall health.
1. Supports Skin Health
Collagen is responsible for much of the skin’s firmness and elasticity. It helps maintain the skin’s structure and contributes to a smooth, youthful appearance. As collagen declines with age, skin may become thinner, drier, and more prone to wrinkles.
2. Protects Joint Health
Collagen helps maintain cartilage, the tissue that cushions joints and allows them to move smoothly. When collagen levels decrease, cartilage can weaken, which may contribute to joint stiffness or discomfort over time.
3. Strengthens Bones
Bones contain large amounts of collagen, which provide flexibility and structure. Collagen works alongside minerals like calcium to keep bones strong. A decline in collagen may contribute to reduced bone density as people age.
4. Supports Muscles and Connective Tissue
Collagen also plays a role in muscle strength and recovery by supporting connective tissues like tendons and ligaments. These tissues help stabilize joints and connect muscles to bones.
Why Collagen Declines With Age
Your body naturally produces collagen using amino acids from protein in your diet. However, collagen production begins to slow down as you age.
Most people start to lose collagen in their mid-20s, and production gradually declines over time.
Several factors can accelerate collagen loss, including:
Sun exposure (UV damage)
Smoking
Excess sugar consumption
Poor nutrition
Chronic stress
Lack of sleep
This decrease in collagen contributes to common signs of aging such as wrinkles, joint discomfort, and reduced skin elasticity.
Foods That Support Collagen Production
While the body makes its own collagen, nutrition plays a major role in supporting that process.
Foods that may help support collagen production include the following.
1. Protein-rich foods
Collagen is made from amino acids, which come from protein. Things like chicken, fish, eggs, beans and legumes, and lean meats are all high in protein.
2. Vitamin C–rich foods
Vitamin C is essential for collagen synthesis. Good sources include citrus fruits, strawberries, bell peppers, broccoli, and tomatoes.
3. Zinc and copper
These minerals also support collagen production and can be found in nuts and seeds, whole grains, shellfish, and leafy greens.
What About Collagen Supplements?
Collagen supplements—often sold as collagen peptides or hydrolyzed collagen—have become increasingly popular. Some research suggests collagen supplements may help support skin elasticity and hydration, joint comfort, and nail and hair strength. However, results can vary, and supplements should not replace a balanced diet.
If you are considering collagen supplements, it’s a good idea to talk with your healthcare provider especially if you have existing health conditions or take medications.
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