If you’ve been digging into gut health, chances are you’ve come across the term leaky gut. It’s a condition where the lining of your small intestine becomes more permeable than it should be—allowing unwanted particles like toxins, microbes, and undigested food to sneak into your bloodstream. This can set off inflammation, immune responses, and a host of symptoms from bloating to brain fog.
While there’s still debate in the mainstream medical community, more and more science is emerging around nutritional approaches that may help strengthen and restore the gut lining. One of the most promising tools? Collagen peptides—especially those rich in glycine, proline, and hydroxyproline.
Let’s break down how collagen works and how it may support your gut.
Collagen: More Than Just Skin Deep
Most people associate collagen with glowing skin or joint support—and that’s true—but collagen is also a major structural component of your gut lining. Specifically, it plays a role in maintaining the integrity of the epithelial barrier—the thin but mighty wall that keeps your digestive tract sealed and functioning smoothly.
This is where collagen peptides shine. When you consume hydrolyzed collagen (like MariGold’s Grass-Fed Collagen Peptides), it’s broken down into amino acids your body can use for tissue repair—including the gut lining.
The Amino Acids That Matter: Glycine, Proline & Hydroxyproline
Glycine: The Gut-Calmer
Glycine is the most abundant amino acid in collagen. It’s known for its anti-inflammatory properties and is a key player in the production of glutathione, your body’s master antioxidant. Glycine also helps regulate stomach acid levels and supports the creation of bile salts—both critical for smooth digestion and keeping gut flora balanced.
But its real superpower? Glycine plays a crucial role in the regeneration of intestinal cells and in tightening up the junctions between them—meaning it may directly help “seal up” a leaky gut.
Proline: The Repairman
Proline is essential for the production of collagen and connective tissue, making it directly useful for healing and repairing damaged gut lining. It also acts as a building block for maintaining tissue elasticity and integrity. Without enough proline, the gut wall can become weak and susceptible to damage from stress, diet, and toxins.
Hydroxyproline: The Stabilizer
This unique amino acid isn’t found in most protein sources—but it’s abundant in collagen. Hydroxyproline helps stabilize collagen fibers, meaning it plays a direct role in keeping the structural framework of the gut lining strong. Studies have shown it can stimulate the proliferation of fibroblasts—cells responsible for tissue repair—making it another key ally in healing a compromised gut barrier.
MariGold Collagen: Clean, Powerful, and Gut-Friendly

At MariGold, we don’t just believe in collagen—we believe in clean, grass-fed, science-backed support for your body. Our Grass-Fed Collagen Peptides are hydrolyzed for easy absorption, rich in glycine, proline, and hydroxyproline, and free of fillers and anything artificial.
Whether you’re dealing with gut issues, recovering from stress, or just want to support your digestion from the inside out, a daily scoop of MariGold Collagen can be a simple, effective addition to your gut health routine.
How to Use It
- Add to your morning coffee or make yourself a delicious cup of MariGold Protein Coffee
- Blend into smoothies with gut-soothing ingredients like ginger and coconut milk
- Stir into soups or bone broth for an extra amino acid boost
Leaky gut isn’t something you have to just “deal with.” With the right nutrients and daily support, your body has incredible potential to heal. Collagen—especially when sourced from high-quality, grass-fed sources—isn’t just trendy, it’s a targeted way to nourish your gut from the inside out.
Start supporting your gut lining today, naturally and deliciously, with MariGold Collagen Peptides.