| Fish skin | Cod, pollock, tilapia, salmon and other commercially processed fish | Primarily Type I collagen; usually converted into hydrolyzed collagen peptides | White to pale-yellow powder; neutral or mild marine odor; water-soluble | High protein content, good solubility, moisture-binding capacity and peptide bioavailability | Food supplements, functional beverages, nutrition bars, cosmetics and personal care formulas | Ask for species, origin, extraction method, odor specifications, heavy-metal testing and allergen declarations |
| Fish scales | Tilapia, carp and other freshwater or marine species | Mostly Type I collagen; hydrolyzed products contain short collagen peptides | Fine powder or granulated powder; generally soluble after enzymatic hydrolysis | Film-forming ability, water retention and support for protein-fortified formulations | Powdered supplements, beverages, food ingredients, skincare and research materials | Scale cleaning and demineralization affect ash, calcium and final color; request ash and mineral data |
| Fish bones | Cod, tuna, salmon and other processing by-products | Type I collagen combined with mineral components before demineralization | Hydrolyzed powder, gelatin or collagen-rich extract | Protein enrichment and water-binding properties; may retain mineral-related components depending on processing | Animal nutrition, food ingredients, supplements and technical applications | Check ash, calcium, phosphorus, particle size and whether the product is fully demineralized |
| Fish swim bladder | Selected marine and freshwater fish species | Collagen-rich material, commonly associated with Type I collagen | Gelatin, collagen extract or hydrolyzed peptide powder | Gel-forming potential in gelatin form; protein functionality varies with hydrolysis level | Specialty foods, traditional food products, gelatin applications and research | Supply can be limited; verify species identification, traceability, odor, microbiology and regulatory status |
| Hydrolyzed peptides | Usually produced from fish skin, scales or bones | Short peptides derived mainly from Type I collagen | Free-flowing powder; readily dispersible in water | Lower molecular size than native collagen, improved solubility and convenient use in beverages | Beauty-from-within products, sports nutrition, healthy-aging formulas and ready-to-mix drinks | Compare peptide molecular-weight distribution, degree of hydrolysis, solubility, taste and sensory performance |
| Native collagen | Primarily obtained from fish skin or connective tissue | Triple-helical collagen structure when processing conditions preserve the native form | Solution, suspension or dried collagen material | Structural protein characteristics and film-forming behavior; generally less soluble than peptides | Cosmetics, biomaterials, laboratory research and specialized formulations | Temperature and pH control are critical; request evidence of structural preservation and biocompatibility data |
| Fish gelatin | Fish skin, scales and bones after controlled thermal treatment | Denatured collagen with gelatin functionality rather than intact collagen structure | Powder, granules or prepared gel | Gelling, thickening, foaming and film-forming properties; gel strength depends on raw material and process | Confectionery, capsules, desserts, dairy alternatives and food texturization | Review gel strength, setting temperature, viscosity, bloom value where applicable, and halal or kosher requirements |
| Marine-sourced ingredient | Wild-caught or farmed fish, depending on the supply chain | Usually Type I collagen or collagen-derived peptides | Powder, liquid concentrate, capsule ingredient or premix | Suitable for pescatarian positioning and can support upcycling of seafood-processing by-products | Dietary supplements, functional foods, beverages and personal care products | Confirm fish species, fishing or farming origin, sustainability documentation, chain of custody and country-specific labeling rules |
| Low-molecular-weight peptides | Typically made from enzymatically hydrolyzed fish collagen | Short-chain collagen-derived peptides; exact profile depends on the enzyme system | Instantized or standard powder | Fast dispersion, low viscosity and easier incorporation into liquid products | Instant beverages, stick packs, clinical nutrition and convenient-dose supplements | Request a molecular-weight profile rather than relying only on a single average value; verify stability and sensory quality |
| High-purity peptide grade | Usually carefully selected fish skin or scales | Purified hydrolyzed Type I collagen peptides | Light-colored, low-odor powder with defined specifications | Consistent protein content, improved sensory profile and reliable batch-to-batch performance | Premium supplements, clinical-use formulations, cosmetics and export-oriented products | Evaluate certificate of analysis, protein assay method, microbiological limits, residual solvents and stability data |