- Project Deep Blue · Food-grade EE Omega-3
Clear & Safe Omega-3,
engineered for purity & clarity
Zhejiang Norbidar Biomedicine produces food-grade EPA/DHA fish oil concentrates from 65% to 88%
— nearly colorless, physically separated, and free of fishy odor — via our proprietary NBD multi-stage distillation process.
Concentration at a glance
Ethyl ester (EE) Omega-3 concentrates, % EPA+DHA
- Physical separation only — no urea, no toxic methanol, no ethyl carbamate.
65%–88%
EPA+DHA concentration
≤ 2
Gardner color
≤ 0.5%
Impurity content
10,000 t
Annual fish oil capacity
- Product Specification
Mid-to-high concentration EPA+DHA, 70–85%
Grade codes denote the nominal EPA and DHA content per gram — for example, 5025 EE supplies 50% EPA and 25% DHA.
All grades are available as ethyl esters (EE), with customizable specifications on request.
| Grade | EPA | DHA | EPA+DHA | Profile |
| 3624 EE | 36% | 24% | 60% | Balanced |
| 4030 EE | 40% | 30% | 70% | Balanced |
| 5020 EE | 50% | 20% | 70% | Balanced |
| 5025 EE | 50% | 25% | 75% | Balanced |
| 5030 EE | 50% | 30% | 80% | Balanced |
| 7005 EE | 70% | 5% | 75% | EPA-leaning |
| 8001 EE | 80% | 1% | 81% | EPA-leaning |
| 4638 EE | 46% | 38% | 84% | Balanced |
| 3050 EE | 30% | 50% | 80% | DHA-leaning |
| 0570 EE | 5% | 70% | 75% | DHA-leaning |
| 0180 EE | 1% | 80% | 81% | DHA-leaning |
- Blended EPA/DHA between 65% and 85% can be formulated to your target. Grade values above are nominal and subject to the certificate of analysis issued per batch.
| Grade | EPA | DHA | Type |
| 7000 EE | 70%+ | < 0.1% | EPA monomer |
| 8000 EE | 80%+ | < 0.1% | EPA monomer |
| 8500 EE | 85%+ | < 0.1% | EPA monomer |
- High-purity EPA with DHA controlled below 0.1% — full component separation by physical distillation.
| Grade | DHA | EPA | Type |
| 7000 EE | 70%+ | < 0.1% | DHA monomer |
| 8000 EE | 80%+ | < 0.1% | DHA monomer |
| 8500 EE | 85%+ | < 0.1% | DHA monomer |
- High-purity DHA with EPA controlled below 0.1% — the counterpart monomer is separated out, not merely diluted.
| Requirement | Capability |
| EPA+DHA blend | Formulated between 65% and 85% to your target ratio (e.g. 5025 · 4638 · 5030 · 8001) |
| EPA monomer | Up to 88% EPA, DHA controlled below 0.1% |
| DHA monomer | Up to 88% DHA, EPA controlled below 0.1% |
- Send us your target specification and application, and our technical team will confirm feasibility and sampling.
- Why it is hard
Pain points in mid-to-high concentration
(65–85%) food-grade fish oil
Every established route to high concentration trades away either food safety, efficiency or cost.
NBD was engineered to break that trade-off.
Molecular Distillation (MD)
Safe, but typically produces EPA+DHA concentrations of only 30–60% — difficult to reach mid-to-high concentrations.
Urea Inclusion Process
Achieves 60–90% purity but with low efficiency. Urea cannot be used in food production and generates toxic ethyl carbamate.
AgNO₃ Process
Produces mid-to-high concentration products, yet fails to meet food production regulations.
Supercritical Fluid Extraction (SFE)
High investment and high operating costs.
Rectification
High temperatures and long heating cycles cause cis-trans isomerization, polymerization and coking.
Supercritical Fluid Chromatography (SFC)
High investment and high operating costs.
Preparative Liquid Chromatography (LC)
High investment and high operating costs, and the process uses toxic methanol.
- NBD innovative technology
The NBD process
A multi-combined, high-efficiency continuous distillation that reaches mid-to-high concentrations other processes struggle to achieve.
VS
High-efficiency distillation
Multi-combined continuous distillation delivers DHA+EPA up to 70–88% — beyond typical molecular distillation (30–60%).
Full component separation
EPA or DHA can each reach 88%, with the counterpart controlled below 0.1%.
Gentle, food-grade, safe
Physical separation, no urea, no toxic methanol — no ethyl carbamate, no cis-trans isomerization.