How do collagen supplements work?
How Do Collagen Supplements Actually Work?
Collagen supplements have grown rapidly in popularity, and by now you've probably heard of them — but you might be unsure exactly what they are and how they work. This guide walks through the science in plain English: what collagen is, what happens when you take a supplement, and what to look for when choosing one. For the full deep-dive into dosing, formats and results timelines, our complete guide to liquid marine collagen is the best place to start.
What Is Collagen?
Think of collagen as a building block: it's a structural protein that supports bones, muscles, cartilage and skin, and plays a role in tissue repair. When we're young we have an abundance of it, which is part of why young skin looks plump and firm. From roughly our mid-twenties onwards, natural production gradually declines — and factors like UV exposure and smoking can accelerate that decline.
That age-related drop is the entire rationale for supplementation: if the body is making less, can taking collagen peptides help? The research — particularly on skin — suggests it may.
The Science: What Happens When You Take Collagen
Collagen in its natural form is a large, tough molecule that the body can't absorb directly. Supplements solve this with hydrolysed collagen — collagen that has been enzymatically broken down into tiny peptide fragments that are far more easily digested and absorbed.
Once absorbed, research suggests these peptides may work in two ways. First, they supply amino acids — including glycine, proline and hydroxyproline — that the body uses as raw material for its own collagen production in fibroblast cells. Second, some studies propose that specific collagen peptides may act as signalling molecules that encourage fibroblasts to produce more collagen, though this mechanism is still being researched and shouldn't be stated as settled fact.
What we can point to is outcome data: a 2019 randomised controlled trial in Nutrients found daily collagen peptides improved skin hydration, elasticity and density versus placebo, and a 2021 systematic review in the International Journal of Dermatology concluded that hydrolysed collagen supplementation showed favourable results for skin hydration and elasticity across 19 studies. Most trials run over 8 to 12 weeks, which is why Kollo recommends a 12-week commitment.
Hydrolysed Collagen at a Glance
| Feature | Detail |
|---|---|
| What it is | Collagen enzymatically broken down into small, easily absorbed peptides |
| Why it matters | The hydrolysis process — not the liquid or powder format — is what determines absorption |
| Key amino acids | Glycine, proline, hydroxyproline |
| Most researched source | Marine collagen — the form used in Kollo (Naticol®) |
| Typical studied timeframe | 8 to 12 weeks of daily use |
| Common formats | Liquid sachets, powders, capsules |
Liquid, Powder or Capsule — Does Format Matter?
Less than the marketing often suggests. Because absorption is determined by the hydrolysis process, both a quality liquid and a quality powder can deliver collagen peptides effectively. The honest differences are practical: pre-measured liquid sachets remove mixing and guesswork, while powders suit people who like blending collagen into smoothies and recipes. If you're weighing up the powder route, our complete guide to collagen powder covers it properly.
One myth worth addressing: marine collagen has a reputation for tasting fishy. A well-formulated supplement shouldn't — Kollo's blend has no fishy taste or smell.
What to Look For in a Collagen Supplement
- A clinically studied dose — Kollo delivers 10,000mg of Naticol® marine collagen peptides per daily sachet.
- Hydrolysed peptides — check the label says "hydrolysed collagen" or "collagen peptides", not just "collagen".
- Named, researched ingredients — a branded peptide like Naticol® tells you which form the research was done on.
- Added vitamins — Kollo includes vitamins B1, B5, B6, B12 and C plus the amino acid l-lysine; several of the vitamins carry authorised UK health claims, including contribution to the reduction of tiredness and fatigue.
- Independent testing — Kollo is Informed Choice certified, with every batch screened for banned substances.
Featured Product
Premium Liquid Marine Collagen
10,000mg of clinically studied Naticol marine collagen daily - for visibly smoother, firmer, more hydrated skin in as little as 28 days.
Shop Now →Who Benefits Most From Collagen Supplementation?
Because collagen production declines from our mid-twenties and the decline steepens through midlife, supplementation is most often discussed by people in their 40s and beyond — particularly women, as falling oestrogen during perimenopause accelerates collagen loss in skin and joints. Our women's wellness guide for over 40s covers how collagen fits alongside other key nutrients at this life stage.
Whatever your age, the same principles apply: choose a hydrolysed product at a clinically studied dose, take it consistently for 12 weeks, and keep a balanced diet and regular exercise as the foundation. For everything else — dosage detail, the Naticol® peptides and the results timeline — head to our complete guide to liquid marine collagen.
Kollo Health was co-founded by Jenni Falconer - TV presenter, Smooth Radio breakfast host, ten-time London Marathon runner and host of the RunPod podcast. Read her story and why she created Kollo.
