Research on why Collagen needs Vitamin C

Taking a collagen supplement doesn't guarantee your body actually builds new collagen from it. That last step, turning amino acids into stable, usable collagen, depends on Vitamin C. Without enough of it, the enzymes responsible for the job simply can't function, no matter how much collagen you're taking in.

Why collagen matters for healthy ageing

Collagen is the most abundant structural protein in the human body. It's a core building block for skin, joints, tendons, and connective tissue, and it's part of what keeps skin firm and joints comfortable as we move through the day. Natural collagen production slows with age, which is why so many people turn to collagen supplements to support it.

What most people don't know about taking collagen

Taking a collagen supplement doesn't mean it goes straight to work. When you consume collagen peptides, your digestive system breaks them down into amino acids, mainly glycine, proline, and hydroxyproline. Those amino acids are the raw material. Your body still has to do the work of assembling them into new collagen of its own.

The role of Vitamin C in collagen synthesis

This is where the research gets specific. Building new collagen depends on two enzymes, prolyl hydroxylase and lysyl hydroxylase, which stabilise the collagen molecule so it can fold into its characteristic triple-helix structure. Both enzymes are iron-dependent, and Vitamin C's job is to keep that iron in its active state. Without Vitamin C, the iron oxidises, the enzymes stop working, and the hydroxylation step fails.

A comprehensive 2025 review in the journal Molecules describes Vitamin C as an essential cofactor acting on prolyl hydroxylase and lysyl hydroxylase, the enzymes responsible for cross-linking collagen molecules and stabilising the triple-helix structure that makes up mature, functional collagen fibres.¹ This isn't new science either, it's one of the most well-established roles Vitamin C plays in the body. Early laboratory studies on cultured skin fibroblasts found that collagen lysyl hydroxylase activity dropped to around 8% of its maximum when Vitamin C (L-ascorbate) was left out entirely.²

In plain terms: no Vitamin C, no stable structure. Your collagen ends up sitting around as raw material, all the parts, none of the assembly.

Why we created the Collagen Support Bundle

Once we saw the research on how tightly these two are linked, the gap was obvious. You could be doing everything right with your collagen and still miss the benefit, simply because your Vitamin C wasn't keeping up. Vitamin C is also water-soluble, meaning your body doesn't store it, so it needs regular replenishing through diet or supplementation.

So we paired them: Marine Collagen Peptides to build the raw material, and Vitamin C to give your body the tools to use it effectively, plus they can be taken together in the one routine.

The raw material Pure Marine Collagen Peptides Provides the amino acids your body needs to build new collagen. $84 Shop Marine Collagen →

The activator Vitamin C Powder Gives your body the cofactor it needs to actually use that collagen. $58 Shop Vitamin C →

As always, this is additive, not a quick fix. Collagen turnover is slow, and results build with consistency over weeks, not days.

Frequently asked questions

Does taking collagen without Vitamin C do anything at all?

It still supplies your body with amino acids, so it's not wasted. But without enough Vitamin C on board, the hydroxylation step that stabilises new collagen can't run at full capacity, so you may not see the full benefit of what you're taking.

How much Vitamin C do I need alongside collagen?

There's no single agreed dose specific to collagen support, general Vitamin C intake recommendations apply. The main point from the research is consistency, since Vitamin C is water-soluble and doesn't store in the body, it needs regular replenishing rather than an occasional top-up.

Can I take Marine Collagen Peptides and Vitamin C Powder together?

Yes, they can be taken together in the same routine, stirred into the same drink if that's easier.

How long before I notice results?

Collagen turnover is a slow, ongoing process. This is additive to your routine, not a quick fix, and results build with consistency over weeks rather than days.

1. Vitamin C: A Comprehensive Review of Its Role in Health, Disease Prevention, and Therapeutic Potential, Molecules, 2025. mdpi.com/1420-3049/30/3/748

2. The effect of ascorbic acid on lysyl and prolyl hydroxylase activity of cultured fibroblasts, Biochimica et Biophysica Acta. sciencedirect.com