Collagen is everywhere. In your coffee, in powders, capsules, and gummies. Brands promise firmer skin, stronger nails, and more flexible joints. But does it actually work? Let's dive into the science behind the hype.
What exactly is collagen?
Collagen is the most abundant protein in your body. It's found in your skin, bones, tendons, ligaments, and cartilage. Think of it as the glue that holds everything together - the word actually comes from the Greek kolla (glue).
From age 25, you produce roughly 1% less collagen each year. This process accelerates after menopause. The result: wrinkles, sagging skin, stiffer joints.
What does the science say?
The research is more nuanced than the marketing suggests, but there are genuinely interesting findings:
Skin: A 2021 meta-analysis (Journal of Drugs in Dermatology) examined 19 studies with 1,125 participants total. The conclusion: hydrolysed collagen supplements significantly improved skin hydration, elasticity, and wrinkle formation compared to placebo.
Joints: A study published in Current Medical Research and Opinion showed that 10 grams of collagen per day significantly reduced joint pain in athletes after 24 weeks.
Nails: A smaller study in the Journal of Cosmetic Dermatology found that bioactive collagen peptides increased nail growth by 12% and reduced breakage by 42%.
But there are caveats
Your stomach breaks collagen down. When you swallow collagen, it's digested into amino acids and peptides. The claim that it goes directly to your skin isn't true. Your body decides where those building blocks go.
Hydrolysed collagen works better. The supplements that proved effective in studies contained hydrolysed collagen (also called collagen peptides). These smaller molecules are better absorbed.
Dosage matters. Most positive studies used 2.5 to 15 grams per day. A gummy with 500 mg probably doesn't do much.
Types of collagen
There are at least 28 types of collagen, but three matter most:
- Type I: Skin, bones, tendons (90% of all collagen in your body)
- Type II: Cartilage and joints
- Type III: Skin, muscles, blood vessels
For skin improvement, look for types I and III. For joints, type II. Many supplements combine multiple types.
What can you do yourself?
Besides supplements, you can support your own collagen production:
- Vitamin C is essential for collagen synthesis. Without enough vitamin C, your body can't produce collagen. A vitamin C serum also works locally on your skin.
- Sun protection is the most important anti-aging step. UV radiation breaks down collagen - wearing SPF daily makes more difference than any supplement.
- Don't smoke. Smoking drastically reduces collagen production.
- Antioxidants in your diet protect existing collagen from degradation. Think berries, green tea, dark chocolate.
Our verdict
Collagen supplements aren't a miracle cure, but the science is promising - especially for skin hydration and elasticity. Choose hydrolysed collagen at a dose of at least 5 grams per day and give it at least 8 weeks.
Combine it with a good skincare routine including vitamin C and SPF for the best results. At Belgian online pharmacies, you'll find a wide range of collagen supplements. Always check the type, dosage per serving, and whether vitamin C has been added - it increases effectiveness.