- 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 |
| 4515 EE | 45% | 15% | 60% | EPA-leaning |
| 4030 EE | 40% | 30% | 70% | Balanced |
| 5020 EE | 50% | 20% | 70% | EPA-leaning |
| 5025 EE | 50% | 25% | 75% | Balanced |
| 5030 EE | 50% | 30% | 80% | Balanced |
| 7005 EE | 70% | 5% | 75% | EPA-leaning |
| 7505 EE | 75% | 5% | 80% | EPA-leaning |
| 4535 EE | 45% | 35% | 80% | Balanced |
| 3050 EE | 30% | 50% | 80% | DHA-leaning |
| 0570 EE | 5% | 70% | 75% | 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% | < 0.5% | EPA monomer |
| 8000 EE | 80% | < 0.5% | 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 |
| 0070 EE | 70% | < 0.5% | DHA monomer |
| 0075 EE | 75% | < 0.5% | DHA monomer |
| 0080 EE | 80% | < 0.5% | 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 60% and 85% to your target ratio (e.g. 5025 · 4535 · 7505 · 3050) |
| EPA monomer | Up to 85% EPA, DHA held at or below 0.5% (0.1% at 8500 EE) |
| DHA monomer | Up to 80% DHA, EPA held at or below 0.5% |
| Ester form | Ethyl ester (EE) concentrates as standard |
| Documentation | Batch certificate of analysis, specification sheet and safety data available on request |
- 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.
- Conventional process
Multi-step, with a hard ceiling
Feedstock DHA+EPA
25–30%
8-stage molecular distillation
50–60%
Urea inclusion & other processes
65–88%
Food-safe ceiling
50–60%
VS
- NBD process
One integrated continuous train
Feedstock DHA+EPA
20–30%
Multi-combined high-efficiency continuous distillation
70–88%
Food-grade result
70–88%
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.
- Applications
One concentrate, many formulations
From supplement softgels to regulated clinical nutrition, our EPA/DHA concentrates deliver clarity, low odour and low colour across applications.
Dietary supplements
Softgels, capsules and liquid-fill formats with high-concentration EPA/DHA.
Functional food & beverage
Clear, low-odor concentrates suited to fortified foods and drinks.
Infant & maternal nutrition
DHA-rich profiles for early-life and maternal formulations.
Clinical & pharmaceutical
High-purity monomers for regulated and clinical applications.
Sports & performance nutrition
EPA-rich concentrates for recovery and performance products.
Pet & animal nutrition
Scalable concentrate supply for companion and livestock nutrition.
- FAQ
Questions formulators ask us
How does the NBD process differ from molecular distillation?
Molecular distillation is safe but typically reaches only 30–60% EPA+DHA, and needs many passes to climb. NBD’s multi-combined, high-efficiency continuous distillation reaches 70–88% in one integrated train.
Are urea, methanol or other solvents used?
No. Our concentrates are obtained by physical separation only — no urea, no toxic methanol. That means no ethyl carbamate and no cis-trans isomerization.
Can EPA or DHA be supplied as single components?
Yes. EPA or DHA can each reach up to 88%, with the counterpart controlled below 0.1%.
What about colour and odour?
Mid-to-high concentration NBD fish oil reaches Gardner colour ≤ 2 with a nearly colourless appearance, and is almost odourless.
Can you customise the EPA/DHA ratio?
Yes. Blended EPA/DHA can be formulated between 65% and 85% to your target — for example 5025, 4638, 5030 or 8001.
What production capacity is available?
The Norbidar site is designed for an annual fish oil processing capacity of 10,000 tons, built to pharmaceutical fine chemical standards.
Ready to formulate with clearer Omega-3?
Tell us your target EPA/DHA ratio and application — we will confirm feasibility, share specifications and arrange a sample.
