Marine Collagen and Cooking: Does Heat Destroy the Peptides?

Yes, you can heat marine collagen powder. The short answer is that hydrolysed collagen peptides behave very differently from intact proteins under heat, and the denaturation concern that puts people off adding collagen to hot drinks or cooked food does not apply in the same way.

Why denaturation is the wrong thing to worry about

Denaturation happens when a protein's three-dimensional structure unfolds under heat. That matters for something like an egg white, where the structure is the point. But collagen peptides have already been through hydrolysis, a process that breaks the original collagen protein into short-chain amino acid fragments. There is no intact three-dimensional structure left to unfold. What you have is a collection of small peptides in powder form, and those peptides do not denature in any meaningful sense.

This is what distinguishes a hydrolysed collagen from, say, whey protein concentrate. Whey contains larger, more complex proteins where high heat can affect solubility and texture. Hydrolysed peptides are far more heat-stable.

What actually happens to collagen peptides at high temperatures

Peptides can degrade if held at extreme temperatures for long periods. The relevant question is not whether any change is theoretically possible, but whether the temperatures involved in normal cooking or hot drinks cause material degradation in the time the collagen is actually exposed to heat.

Hot coffee or tea is typically served at around 70–85°C. Boiling water is 100°C. Baking in an oven might reach 180–200°C, but the food itself rarely exceeds 100°C internally while moisture is present. Collagen peptides stirred into liquid at these temperatures are exposed briefly before the drink cools or the dish is served. There is no good evidence that brief exposure at domestic cooking temperatures materially degrades hydrolysed collagen peptides in a way that would concern a supplement user.

Where things get more uncertain is sustained, very high dry heat — roasting or grilling where surface temperatures exceed 150°C for extended periods. In those scenarios, Maillard reactions (a browning reaction between amino acids and sugars) can occur. This is a normal part of cooking chemistry and affects many foods, but it does mean that baking collagen powder directly into something like biscuits at high temperatures for 20–30 minutes is a different situation from stirring it into a hot drink.

Practical guidance

• Hot drinks — coffee, tea, broth, warm water — are fine. Stir or blend thoroughly to avoid clumps. The temperature involved is not a problem for hydrolysed peptides.
• Stirring into soups or sauces shortly before serving is a sensible approach. You get the benefit of heat aiding dissolution without prolonged high-temperature exposure.
• Adding to overnight oats, smoothies or cold drinks also works well and avoids the question entirely.
• High-temperature baking directly into dry goods is the area of most uncertainty. It is not something we would specifically recommend, not because the science is settled against it, but because it is not settled either way.

If you want more detail on getting collagen powder to dissolve cleanly in hot liquid without clumping, mixing collagen powder without lumps covers the practical steps.

Does the source of the collagen matter here?

Not significantly, for heat stability. Whether the collagen is marine or bovine, if it has been hydrolysed into peptides, the heat behaviour is broadly similar. The difference between marine and bovine collagen is largely in source, type, and amino acid profile — not in how the peptides respond to cooking temperatures. If you want to understand more about how the two compare, bovine or marine collagen: which to choose is a good starting point.

One thing to be clear about

There are no authorised health claims for collagen under UK food supplement law. That means we cannot tell you that heating or not heating collagen affects any health outcome, because we cannot tell you what that health outcome is in the first place. What we can say is that from a protein chemistry standpoint, brief exposure to normal cooking temperatures does not destroy hydrolysed peptides.

Pump House Marine Collagen Powder is 100% hydrolysed Type I collagen from wild-caught North Atlantic fish, with 90g of protein per 100g and nothing else added. It contains fish and is not suitable for anyone with a fish or shellfish allergy or intolerance.

If you are thinking about which format suits your routine better, collagen capsules sidestep the mixing question altogether, though the dose per serving differs considerably from the powder.