# Marine peptides & nutraceuticals

Bioactive peptides, low-molecular-weight collagen and omega-3 recovered from fishery by-catch (heads, skin, bones) by enzymatic hydrolysis, tangential ultrafiltration and spray-drying — a circular-blue-economy stack for nutraceuticals, cosmeceuticals and functional food.

Source: https://en.bioecon.ru/technology/marine-peptides-nutraceuticals/
Updated: 2026-08-18



## Overview and value chain

Markers: [EC: EU Waste Framework Directive / Circular Bioeconomy | OECD: Marine Bioeconomy | Regulator: FDA (USA), EFSA (EU), NMPA (China)]

Marine peptides and nutraceuticals from fishery by-products is a high-value
circular-bioeconomy stream that turns the 50–70% of fish mass (heads, skin,
bones, scales, viscera) historically discarded or down-cycled into feed meal
into premium ingredients for nutraceuticals, cosmeceuticals and functional
food. These by-streams are a rich source of animal protein, collagen,
omega-3 polyunsaturated fatty acids and bioactive peptides. With modern
enzymatic hydrolysis, ultrafiltration and spray-drying, fish off-cuts become
premium marine-collagen peptides whose low molecular weight (<2 kDa) gives
them markedly higher bioavailability than bovine or porcine collagen.
Bioactive peptides split out by specific proteases show ACE-inhibiting
anti-hypertensive, antioxidant, anti-inflammatory and immunomodulatory
activity, underpinning supplements and geroprotective formats. The 2026
market is expanding fast, driven by the EU Zero-Waste stack of food-waste
rules and a global swing to clean, hypoallergenic (halal, kosher) protein
sources.

The key directions of marine peptides & nutraceuticals are:
1. **Low-molecular-weight marine collagen (Low-MW Marine Collagen):** type I and III peptides extracted mainly from cod-family skin (cod, haddock, pollock), neutral in taste and odour, used to stimulate endogenous collagen synthesis in skin and joints.
2. **Fish protein hydrolysates (Fish Protein Hydrolysates):** deep hydrolysates of muscle tissue, heads and viscera carrying a balanced essential-amino-acid and short-peptide profile, used in sports nutrition and hypoallergenic diets.
3. **Chitosan and glucosamine (Chitosan & Glucosamine):** produced by deacetylation of chitin from crustacean shells (shrimp, crab); chitosan is a fat-and-toxin sorbent and a biodegradable preservation film.
4. **High-purity omega-3 EPA/DHA concentrates (High-Purity Omega-3):** extracted from liver and viscera oil by supercritical-fluid extraction that prevents oxidation of the unstable lipids.

### Sectoral value chain

```
[By-catch streams (skin, heads)] ──> [Enzymatic hydrolysis] ──> [Membrane ultrafiltration]
           │                                    │                              │
    (port-side sorting)                 (bond cleavage)              (<2 kDa fractionation)
                                                                       │
[End products (collagen, supplements)] <─── [Spray drying] <──────────┘
```

### Value chain levels

| Level | Description | Key inputs/outputs |
|:---|:---|:---|
| **Sourcing & Logistics** | Collection of fresh, unspoiled by-products at factory ships and shore plants, with rapid shock-freezing of the feedstock. | **In:** cod/salmon heads, skin, fins, scales.<br>**Out:** standardized food-grade frozen feedstock. |
| **Pre-treatment** | Disinfection, ice-water washing and mechanical removal of residual muscle; weak-acid demineralization of bones and scales. | **In:** frozen fish off-cuts, organic acids.<br>**Out:** cleaned, de-salted collagen-bearing protein matrix. |
| **Enzymatic Hydrolysis** | Controlled hydrolysis in a bioreactor with food-grade endo- and exoproteases that cut protein to the target peptide length. | **In:** protein matrix, enzymes (Alcalase, Flavourzyme), water.<br>**Out:** liquid crude hydrolysate (amino-acid and peptide mix). |
| **Separation** | Removal of insoluble sediment and free fish oil on tricanter centrifuges; deep polishing on activated carbon to strip pigment and odour. | **In:** liquid hydrolysate, activated carbon, centrifuges.<br>**Out:** clear, deodorized peptide and collagen solution. |
| **Ultrafiltration (UF/NF)** | Cascaded membrane passage that selectively cuts off peptides with molecular weight strictly under 2 kDa for optimal bioavailability. | **In:** clarified solution, ultrafiltration modules.<br>**Out:** concentrated low-MW peptide permeate. |
| **Drying & Packaging** | Vacuum concentration and spray-drying to a fine, hygroscopic white peptide powder. | **In:** peptide concentrate, spray dryer, nitrogen.<br>**Out:** commercial-grade marine collagen/peptide powder. |

Cross-cutting technologies of the sector:
- **Mild directed enzymatic hydrolysis (Enzyme-Assisted Hydrolysis):** combinations of high-specificity plant, animal and microbial proteases cleave defined peptide bonds, minimizing the free hydrophobic amino acids that make hydrolysates bitter.
- **Tangential membrane filtration (Cross-Flow Filtration):** the feed flows parallel to the membrane surface, preventing pore fouling and letting peptides be size-fractionated continuously (e.g. 1–3 kDa for cosmetics, 3–5 kDa for joints).
- **Microencapsulation and nanoemulsions (Microencapsulation):** unstable peptides and omega-3 are sealed in liposomal or maltodextrin shells that mask fish taste and shield the actives from oxidation and gastric juice.

---

## US

The US leads consumption of sports and anti-ageing marine collagen, integrating it into functional drinks and ready-to-mix nutrition, while the FDA gates new marine-peptide ingredients through a strict GRAS process.

### Cargill marine collagen, circular Alaska fish-oil, FDA GRAS validation
- **Cargill marine collagen:** the US food conglomerate runs food- and cosmetic-grade marine collagen lines, sourcing and processing wild cold-water fish skins into soluble premixes for American beauty-and-health brands.
- **Circular Alaska fish oil:** processors along the Alaska coast recover high-purity omega-3 concentrate from wild salmon and pollock by-products, cutting imported feedstock and the carbon footprint of the US seafood chain.
- **FDA GRAS validation:** marine-peptide makers must clear the FDA GRAS process, proving the absence of residual heavy metals (mercury, cadmium) and pathogenic toxins before ingredient use.

---

## CN

China is the world's largest processor of aquatic biomass, running giant deep-processing clusters for fish by-products in Shandong province that supply export volumes of high-purity collagen powder.

### YSFRI R&D, Shandong biorefineries, scale-up of fish collagen peptides
- **YSFRI R&D in Qingdao:** the Yellow Sea Fisheries Research Institute is China's lead state centre for marine-by-product biotech, holding dozens of patents on combined collagen, hyaluronic-acid and sulfated-polysaccharide recovery from fish scales and cartilage.
- **Shandong Peninsula biorefineries:** Shandong concentrates the country's largest seafood-processing capacity, with plants such as Shandong Oriental Ocean turning hundreds of thousands of tonnes of fish off-cuts into cheap, high-purity collagen powder for export to Asia and Europe.
- **Industrial scale-up of collagen-peptide extraction:** Chinese lines use automated fermenters up to 100 m³ and very large spray dryers, delivering collagen at industrial scale with low operating cost.

---

## EU

The European Union is the world's main supplier of eco-certified premium wild-North-Sea fish collagen, built on the EU circular-economy rulebook and a strong Norwegian blue-bioeconomy cluster.

### Seagarden & Hofseth blue biotech, Copalis B2B ingredients, EFSA Novel Food
- **Seagarden (Norway):** a leading European producer of pure collagen from wild Arctic cod skin caught in the clean waters of the Norwegian and Barents seas, MSC-certified and sold in more than 40 countries.
- **Hofseth Biocare enzymatic hydrolysis:** a Norwegian biotech running a patented continuous enzymatic hydrolysis of fresh (never-frozen) salmon heads and bones at the processing plant, yielding three zero-waste products — purified fish oil OmeGo, soluble protein hydrolysate ProGo and joint calcium powder CalGo.
- **EFSA Novel Food and Copalis:** EFSA runs multi-year safety testing of bioactive marine peptides before clearing them as Novel Foods, checking allergenic potential and molecular-profile stability, while Copalis (France) supplies specialized wild-fish hydrolysates (Alphamine, Collactive) as a B2B ingredient partner.

---

## Leading companies and research institutes

| Company / Institute | Country | Key products / platforms | Tech features | Status 2026 |
|:---|:---|:---|:---|:---|
| **Seagarden** | 🇳🇴 Norway | *Marine Collagen* powder | wild Arctic cod-skin extraction, MSC, full traceability | commercial |
| **Hofseth Biocare** | 🇳🇴 Norway | *ProGo, OmeGo, CalGo* | zero-waste enzymatic hydrolysis of fresh salmon | commercial |
| **Copalis** | 🇫🇷 France | *Alphamine, Collactive* | specialized wild-fish collagen-elastin hydrolysates | commercial |
| **Cargill** | 🇺🇸 USA | *Marine Collagen* lines | global logistics, H&W-brand ingredient integration | commercial |
| **YSFRI** | 🇨🇳 China | extraction-process patents | hydrolysis combined with supercritical CO2 lipid extraction | operating |
| **Nofima** | 🇳🇴 Norway | peptide bioactivity research | pilot lines and clinical peptide trials for diabetes | operating |

---

## Tech stack and innovations

Blue-nutraceutical production rests on tangential-flow membrane cascades, industrial spray-drying and supercritical-CO2 extraction that protect fragile omega-3 double bonds from oxidation.

1. **Cascaded tangential ultrafiltration (TFF Membrane Filtration):**
   - the liquid hydrolysate is pumped at high pressure parallel to polyethersulfone hollow-fibre membranes, holding transmembrane pressure to split retentate (large proteins sent back for re-hydrolysis) from a permeate of collagen peptides strictly under 2 kDa.
2. **Industrial spray dryers (Spray Drying):**
   - the peptide concentrate is atomized as a fine mist into a chamber of sterile air heated to 180 °C; water flashes off instantly and dry spherical peptide microgranules settle in the cyclone, with evaporative cooling preventing thermal damage and caramelization of the amino acids.
3. **Supercritical-CO2 extraction (Supercritical Fluid Extraction):**
   - fish-liver oil is fed into an extraction column where supercritical carbon dioxide (about 31 °C, 300 bar) is the solvent, recovering delicate omega-3 lipids without toxic organic solvents or heat and fully protecting the double bonds from oxidation.

---

## Value chains and production pipelines

### Industrial pipeline of high-purity bioactive collagen peptides from cod skin by continuous enzymatic hydrolysis and spray-drying (ISO 22000 / GMP)

```
┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Mincing and washing    │ ───> │ 2. Acid-alkaline          │
│    cod skin               │      │    demineralization       │
└───────────────────────────┘      └───────────────────────────┘
                                                  │
                                                  ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Membrane separation    │ <─── │ 3. Enzymatic hydrolysis   │
│    (UF/NF)                │      │    (proteases)            │
└───────────────────────────┘      └───────────────────────────┘
              │
              ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Spray drying and       │ ───> │ 6. Packing and peptide    │
│    granulation            │      │    MW quality control     │
└───────────────────────────┘      └───────────────────────────┘
```

#### Stage 1: Feedstock preparation and mechanical cleaning of cod skin
Frozen blocks of Atlantic cod (Gadus morhua) skin are defrosted at 4 °C over 12 hours, washed in ice-cold deionized water to remove residual scales, mucus and salt, and minced through a 5 mm grate to maximize the contact area for reagents.

#### Stage 2: Acid-alkaline conditioning and demineralization
The mince is pumped into a jacketed reactor and treated with 0.1 M sodium hydroxide at 6 °C for 4 hours to remove non-collagen proteins, lipids and pigments, then washed to neutral pH; a weak 0.05 M hydrochloric-acid step softens the structure and removes calcium salts, and the swollen collagen mass is washed with ice water to pH 6.5.

#### Stage 3: Precision enzymatic hydrolysis
Deionized water is added to the demineralized mass at 1:2, the reactor is heated to 55 °C and the pH is held at 8.0 by automatic alkali dosing; an industrial protease (Alcalase 2.4L at 0.8% of dry protein mass) is dosed in and hydrolysis runs under continuous mixing for 3 hours, cleaving collagen fibrils into short peptide chains before the reaction is arrested by flash-heating to 85 °C for 15 minutes.

#### Stage 4: Selective membrane fractionation
The hot mix is cooled to 45 °C and fed to a tricanter centrifuge to remove large insoluble scale particles and freed oil; the clarified hydrolysate passes through an activated-carbon filter to strip yellow pigment and fish odour, and a tangential-flow ultrafiltration unit with a 2 kDa cut-off collects the low-molecular-weight collagen peptide permeate while retentate returns to the hydrolysis reactor.

#### Stage 5: High-temperature spray drying
The peptide permeate is vacuum-concentrated to 35% dry solids, flash-pasteurized at 120 °C for 4 seconds, and atomized under 180 bar into a spray dryer with 180 °C inlet and 85 °C outlet air; the dry white powder settles in the cyclone, is cooled by dry cold air and conveyed to packing.

#### Stage 6: Packing, quality certification and laboratory QC
The marine collagen powder is sieved to remove agglomerates; QC samples each batch for molecular-weight distribution by HPLC (strictly >90% of peptides under 2 kDa), moisture (<5%), solubility, absence of heavy metals (arsenic, mercury, lead) by ICP-MS, and microbiological purity (no salmonella, no coliforms) before vacuum or nitrogen packing in three-layer kraft bags with a polyethylene liner for B2B shipment.