Collagen vs Keratin

What Is Collagen?

Collagen is the most abundant protein in your body, making up about 30% of your total protein content. It's the primary structural component of your skin, bones, tendons, ligaments, and other connective tissues.

As you age, your body produces less collagen—approximately 1% less each year after your mid-20s. This decline contributes to visible signs of aging like wrinkles, sagging skin, and joint stiffness. Collagen supplements aim to support your body's collagen levels by providing the amino acids (primarily glycine, proline, and hydroxyproline) needed for collagen production.

Research has shown that hydrolyzed collagen peptides can improve skin hydration, elasticity, and reduce the appearance of wrinkles after 8-12 weeks of consistent supplementation.

What Is Keratin?

Keratin is a protein source that differs from collagen in its amino acid composition and primary functions. While collagen is rich in glycine, proline, and hydroxyproline (amino acids that support connective tissue), keratin may have a different amino acid profile suited for other purposes.

Proteins serve various roles in the body, from building muscle to supporting immune function. Understanding the specific benefits of keratin helps you choose the right supplement for your goals.

Key Differences

When to Choose Collagen

Collagen may be the better choice if your primary goals include:

• Skin health: Improving skin hydration, elasticity, and reducing fine lines
• Joint support: Supporting joint comfort and mobility
• Hair and nails: Strengthening brittle nails and supporting hair health
• Gut health: Supporting the gut lining and digestive health
• Overall connective tissue: Supporting tendons, ligaments, and bones

When to Choose Keratin

Keratin may be the better choice if your primary goals include:

• Hair-specific
• Nail strength
• Hair treatments

The Verdict

Both collagen and keratin can be valuable additions to your wellness routine, but they serve different purposes.

Choose collagen if you're primarily focused on skin health, joint support, hair and nail strength, or overall connective tissue health. Collagen provides the specific amino acids your body uses to build and maintain these tissues.

Choose keratin if your primary goals align more with its key benefits: hair-specific and nail strength.

Consider taking both if you want to address multiple health goals. Many people successfully combine collagen with keratin as part of a comprehensive supplement routine.