Protein science report
Collagen vs Recov: is collagen a complete protein?
Collagen peptides lack tryptophan, so collagen isn't a complete protein. How it compares with Recov's pre-digested protein with all 20 amino acids.
No. Collagen isn't a complete protein. It contains no tryptophan, an amino acid your body can't make for itself.
Recov is a complete protein: all 20 amino acids, pre-digested into di- and tri-peptides. As a protein for people who train, the two aren't equivalent.
What are collagen peptides?
Collagen is the main structural protein in animal connective tissue. Collagen supplements are made from the hides, bones and scales of cattle, pigs and fish. "Collagen peptides" and "hydrolysed collagen" mean the same thing: collagen that has been broken down with enzymes into shorter chains, so it dissolves easily in a drink.
Collagen has an unusual amino acid make-up. It's very rich in glycine, proline and hydroxyproline, which suit its role as a structural protein, and low or missing in others.
Is collagen a complete protein?
No. A complete protein supplies every amino acid your body can't make for itself. Collagen supplements contain essentially no tryptophan, which is why nutrition science classes collagen as an incomplete protein.
None of that makes collagen a bad product for what people buy it for. It just means collagen can't stand in for a complete protein. If you count collagen grams toward your daily protein target, you're counting protein that's missing an essential building block.
What's the difference between collagen peptides and Recov?
Both are pre-digested proteins, and that's where the similarity ends.
| Collagen peptides | Recov Protein Concentrate | |
|---|---|---|
| Source | Bovine, porcine or marine collagen (hide, bone, scales) | Porcine plasma protein |
| Complete protein? | No (essentially no tryptophan) | Yes: all 20 amino acids |
| Tryptophan | Essentially none | 20.66 mg per tablet on the label (82.64 mg per four-tablet serve) |
| Form of the protein | Hydrolysed peptides (the length varies) | Di- and tri-peptides, taken up via PEPT1 in 15–25 minutes |
| Amino acid profile | Dominated by glycine, proline and hydroxyproline | Every amino acid your body builds with |
| Usual format | Powder stirred into a drink | Tablets swallowed with water |
| Flavours and sweeteners | Varies by brand | None |
You can check the Recov side yourself. Every amino acid on the panel, tryptophan included, is printed in milligrams on the ingredients page.
"Your whole bloodstream carries only 2–3g of amino acids at any moment. Six tablets of Recov deliver roughly that entire amount, already broken down into small peptides your body absorbs directly."
Recov's formulation teamWhy does "pre-digested" matter if both are hydrolysed?
Hydrolysis breaks protein into shorter chains, and products differ in how short. Recov is taken down to di- and tri-peptides, chains of two or three amino acids. That's the size PEPT1, a transporter in the gut wall built for peptides, carries across intact. Recov's protein reaches the bloodstream in 15–25 minutes. The science page covers the research on that route.
So "collagen peptides" and "Recov" both describe peptides from animal protein. The real difference is completeness: collagen is missing tryptophan, and Recov is a complete protein. Then there's the format, a tablet you swallow versus a powder you mix.
"Peptides are burned for energy about 10 times more slowly than free amino acids, so more of every tablet goes to work."
Recov's formulation teamDoes collagen count toward your daily protein?
On a nutrition panel, yes. Collagen grams are listed as protein. As a source of essential amino acids, it falls short, because tryptophan is missing.
The NHMRC Nutrient Reference Values set the recommended dietary intake for adults aged 19–70 at 0.84 g of protein per kilogram of body weight for men and 0.75 g/kg for women. The joint sports nutrition position statement from the American College of Sports Medicine, Academy of Nutrition and Dietetics and Dietitians of Canada puts athletes at 1.2–2.0 g/kg. Those targets assume the protein you eat is reasonably complete. Most people who eat varied meals get complete protein from food, and a collagen scoop sits on top.
Label check: tryptophan
From the Recov label panel
The label lists 20.66 mg of L-tryptophan per tablet, which is 82.64 mg per four-tablet serve, alongside the other essential amino acids. Collagen supplements contain essentially none.
Can you take collagen and Recov together?
Yes. They're different products bought for different reasons, and nothing about one rules out the other. If you already take collagen for your own reasons, Recov adds a complete, pre-digested protein in tablet form. If you're choosing a protein for training, choose the complete one.
Recov works on the Bi-Peptide Window. Your whole bloodstream carries only 2–3g of amino acids at any moment. Six tablets of Recov deliver roughly that entire amount, already broken down into small peptides your body absorbs directly. Six tablets a day sits alongside a protein-rich diet. It's made to EU manufacturing standards and sold since 2010, and more than 10,000 customers have used it. You can see the product here.
"Peptides don't only feed your body. They signal, too."
Recov's formulation teamFrequently asked questions
Is collagen protein or not?
It's a protein, but an incomplete one. It has essentially no tryptophan, so it can't do the job of a complete protein on its own.
Is Recov made from collagen?
No. Recov is made from porcine plasma protein, the protein fraction of blood plasma, not from skin, bone or hide. It's a different protein with a different amino acid profile.
Does Recov contain tryptophan?
Yes. The label lists 20.66 mg of L-tryptophan per tablet, which is 82.64 mg per four-tablet serve, alongside the other essential amino acids.
Can collagen replace protein powder?
Not as a like-for-like protein source. Whey and most plant blends are complete proteins, and collagen isn't. If you use collagen, keep a complete protein in your diet too.
Is Recov suitable for pescatarians or vegetarians?
No. Recov is porcine-derived, so it isn't suitable for vegetarians, vegans, pescatarians or anyone who avoids porcine-derived ingredients.
