What Collagen Really Does to Your Body
Dr. Eric Berg DCPublished on November 25, 2025
Summary authored by editor@wellifi.com
TLDR Summary
Collagen is crucial for maintaining connective tissues and overall health, far beyond its beauty benefits. As we age, collagen levels decline, leading to various health issues, making it essential to incorporate collagen-rich foods and supplements into our diet.
Key Points
- Collagen makes up 30% of the protein in our body, essential for connective tissues.
- Modern diets are deficient in collagen, leading to aging signs like wrinkles and fragile joints.
- Collagen has antioxidant properties and helps improve sleep and gut health.
- 90% of dietary collagen breaks down into amino acids, while 10% remains as signaling peptides.
- Eating collagen-rich foods and using collagen supplements can help boost collagen levels.
The Real Benefits of Collagen: Beyond Beauty
Welcome back to our blog! Today, we dive into a fascinating topic that often gets overshadowed by the beauty benefits of collagen. While many people associate collagen with healthier hair, skin, and nails, the true purpose of collagen extends far beyond aesthetics. Join us as we explore the essential functions of collagen in the body and how we can ensure we’re getting enough of this vital protein.
Understanding Collagen: A Brief Background
Collagen is a crucial protein that makes up about 30% of the protein in our bodies. It is a fundamental component of connective tissues, including tendons, ligaments, cartilage, and even bones. Historically, our ancestors consumed a diet rich in collagen by eating nose-to-tail, including organ meats, bone marrow, and cartilage-rich stews. However, modern dietary preferences lean towards tender, lean meats, resulting in only 1-3% of our protein intake coming from collagen, leading to significant deficiencies.
The Decline of Collagen with Age
As we age, collagen levels decline drastically. By the age of 75, individuals can lose up to 80% of their collagen. This loss contributes to wrinkles, sagging skin, and fragile joints, making collagen crucial for maintaining youthful resilience and structural integrity.
Minor Benefits of Collagen
- Antioxidant Properties: Collagen helps increase glutathione levels, a vital antioxidant for liver detoxification.
- Improved Sleep Quality: Collagen is beneficial for sleep cycles, largely due to its key amino acid, glycine.
- Gut Health Support: Collagen plays a role in repairing the gut lining, helping to prevent leaky gut syndrome.
How Collagen Works in the Body
When we consume collagen, approximately 90% of it breaks down into individual amino acids. However, around 10% remains as peptide chains, which act as signaling molecules that instruct the body to repair and rebuild collagen tissues. This process is essential for maintaining healthy skin, joints, and connective tissues.
The Unique Role of Peptides
Unlike other protein sources, collagen peptides trigger the body to stimulate collagen production. When consuming conventional protein sources like muscle meat, eggs, or fish, we only obtain amino acids without the signaling peptides necessary for collagen repair.
Strategies to Boost Your Collagen Intake
To increase collagen levels in your diet, consider the following options:
- Incorporate collagen-rich foods such as chicken skin, fish skin, and bone broth into your meals.
- Consider using collagen protein powder, which can easily be added to beverages without altering the taste.
- Include grass-fed meats in your diet, which are often higher in collagen due to the animals' healthier lifestyles.
Co-Factors for Collagen Synthesis
It’s important to note that certain nutrients support collagen synthesis. Vitamin C, biotin, and trace minerals like copper play vital roles in collagen production, emphasizing the need for a diverse and balanced diet.
Conclusion
Collagen is more than just a beauty supplement; it’s a critical protein that supports overall health, especially as we age. By understanding its functions and incorporating collagen-rich foods into our diets, we can promote better health and mitigate some effects of aging. For more insights on collagen and its benefits for hair, nails, and skin, be sure to check out Dr. Berg's previous videos!