Collagen is the most abundant protein in the human body, making up roughly 30% of total protein content. It forms the structural foundation of your skin, bones, tendons, ligaments, and cartilage. But as we age, our body's natural collagen production declines — and that's where collagen supplementation has gained significant scientific attention.
In this evidence-based guide, we'll explore the real collagen benefits, break down the different types, and help you understand what to look for in a quality supplement.
What Is Collagen?
Collagen is a structural protein made up of amino acids — primarily glycine, proline, and hydroxyproline. These amino acids form a triple-helix structure that gives collagen its remarkable tensile strength and flexibility. Think of it as the scaffolding that holds your body together.
Your body produces collagen naturally, but production begins to slow in your mid-20s and continues to decline with age. Factors like UV exposure, smoking, excess sugar, and chronic stress can accelerate this decline.
Types of Collagen
There are at least 28 known types of collagen, but the most relevant for supplementation are:
- Type I – The most abundant type, found in skin, tendons, bones, and connective tissue. Most associated with skin elasticity and firmness.
- Type II – Found primarily in cartilage. Most studied for joint health and mobility support.
- Type III – Often found alongside Type I, supporting skin structure and organ integrity.
Most collagen supplements use hydrolysed collagen (also called collagen peptides), which is broken down into smaller chains for better absorption.
Science-Backed Collagen Benefits
1. Skin Elasticity and Hydration
Multiple randomised controlled trials have shown that collagen peptide supplementation can improve skin elasticity, hydration, and reduce the appearance of wrinkles. A 2019 review in the Journal of Drugs in Dermatology found consistent improvements in skin moisture and elasticity with daily collagen supplementation over 8–12 weeks.
2. Joint Health and Mobility
Type II collagen has been studied extensively for its role in supporting cartilage integrity. Research suggests that collagen supplementation may help reduce joint discomfort and improve mobility, particularly in individuals with age-related joint wear. A study published in Current Medical Research and Opinion found that athletes who supplemented with collagen reported significantly less joint pain during activity.
3. Bone Density Support
Collagen makes up a significant portion of bone matrix. Preliminary research suggests that collagen peptides may support bone mineral density, particularly in postmenopausal women, though more long-term studies are needed.
4. Muscle Recovery
Collagen is rich in glycine and proline, amino acids that support connective tissue repair. When combined with resistance training, collagen supplementation has shown promise in supporting lean muscle maintenance and recovery from exercise-related tissue stress.
5. Gut Lining Support
Glycine, a key amino acid in collagen, plays a role in maintaining the integrity of the gut lining. While research is still emerging, some practitioners use collagen as part of gut health protocols.
What the Research Doesn't Confirm (Yet)
It's important to be honest: not all collagen claims are equally supported. Hair and nail growth benefits, while anecdotally popular, have limited clinical evidence. Similarly, the idea that collagen supplements directly "rebuild" your joints is an oversimplification — the body breaks down ingested collagen into amino acids and redistributes them based on need.
At MoreGood, we believe in setting realistic expectations. Collagen is a valuable addition to a balanced nutrition plan — not a miracle cure.
How to Choose a Quality Collagen Supplement
- Source matters – Marine collagen (from fish) is high in Type I and has excellent bioavailability. Bovine collagen provides both Type I and Type III.
- Look for hydrolysed peptides – These are more easily absorbed than whole collagen protein.
- Check for additives – Avoid products with unnecessary fillers, artificial sweeteners, or proprietary blends that hide dosages.
- Pair with Vitamin C – Vitamin C is essential for collagen synthesis. A supplement or diet rich in Vitamin C can enhance the benefits.
- Dosage – Most studies use 2.5g to 15g of collagen peptides per day. Consistency over 8–12 weeks is key to seeing results.
The MoreGood Perspective
Collagen supplementation, when sourced responsibly and used consistently, is one of the more well-researched additions to a daily wellness routine. The evidence for skin and joint benefits is particularly strong. Like all supplements, it works best as part of a broader commitment to nutrition, movement, and recovery — not as a standalone solution.
We believe in clean formulations, transparent labelling, and honest science. If you have questions about whether collagen is right for you, consult a qualified healthcare professional.