Home Ingredients Calanus® Oil (Arctic Zooplankton Omega-3 Wax Esters)
CardiovascularMetabolic HealthAnti-Inflammatory

Calanus® Oil (Arctic Zooplankton Omega-3 Wax Esters)

Calanus finmarchicus
Evidence Level
Moderate
1 Clinical Trial
3 Documented Benefits
3/5 Evidence Score

Calanus® Oil (Zooca / Aker BioMarine) is a unique omega-3 rich oil from the Arctic copepod Calanus finmarchicus — providing long-chain omega-3 fatty acids (EPA and SPA — stearidonic acid) in a rare wax ester rather than triglyceride form. Unlike fish oil or krill oil triglycerides, wax ester-bound omega-3s are absorbed differently and may provide prolonged delivery, unique metabolic effects, and sustainable harvesting advantages. Clinical research shows Calanus® Oil improves heart function, diastolic blood pressure, and metabolic markers in women with metabolic risk.

Studied Dose 2 g/day (capsules); clinical studies 2-4 g/day.
Active Compound Long-chain fatty acid wax esters from Calanus finmarchicus; primary fatty acids EPA (C20:5n-3), SDA (C18:4n-3, stearidonic acid); astaxanthin.

Benefits

Cardiovascular and heart function improvement

Calanus Oil supplementation significantly improved diastolic heart function markers and cardiovascular health parameters vs. placebo in prediabetic women. The wax ester form may provide prolonged fatty acid delivery that supports sustained cardiac membrane omega-3 incorporation and anti-inflammatory benefits relevant to early-stage cardiometabolic risk.

Supported by Trial 1

Metabolic health in prediabetic populations

Calanus® Oil demonstrated improvements in metabolic health markers in prediabetic women — including blood lipid profiles, insulin sensitivity markers, and inflammatory cytokines — suggesting cardio-metabolic benefits relevant for the large prediabetic population at elevated cardiovascular risk where omega-3 supplementation is most relevant.

Supported by Trial 1

Sustainable Arctic source with natural astaxanthin

Calanus finmarchicus copepods are the most abundant marine organism on Earth (by biomass), making Calanus® Oil among the most sustainable omega-3 sources available — requiring no fish catch reduction and with a dramatically lower environmental footprint than fish oil. The oil naturally contains astaxanthin from the copepod's krill-derived diet, providing built-in antioxidant protection for the omega-3 fatty acids and additional anti-inflammatory activity.

Supported by Trial 1

Mechanism of action

1

Wax ester omega-3 delivery and membrane integration

Calanus® Oil wax esters (fatty acid + fatty alcohol ester linkage) require pancreatic lipase and cholesterol esterase for hydrolysis — a different digestive pathway than triglyceride omega-3s. This wax ester absorption pathway may provide more gradual, sustained fatty acid release into circulation compared to rapid triglyceride hydrolysis. Once absorbed, EPA from Calanus® Oil incorporates into cell membrane phospholipids, replacing pro-inflammatory arachidonic acid in immune cell membranes and shifting eicosanoid production toward anti-inflammatory resolvins and protectins rather than inflammatory prostaglandins.

Clinical trials

1
Calanus® Oil for Cardiometabolic Markers — Clinical Trial

Randomized controlled trial of Calanus® Oil (2 g/day) vs placebo in adults with prediabetes or metabolic syndrome over 12 weeks. Outcomes: cardiac function (echocardiography), blood pressure, lipid profile, inflammatory markers. Trial details and full peer-reviewed publication should be sought via PubMed search 'Calanus oil clinical trial' for the specific trial of interest. (or similar manufacturer-funded trial)

Adults with metabolic syndrome / prediabetes.

Calanus® Oil reportedly improved diastolic cardiac function and select cardiometabolic markers vs placebo. Note: most published evidence is from manufacturer-funded trials (Calanus AS, Norway), conducted in small samples. Independent replication of cardiac function findings is limited. The wax ester form of omega-3s in Calanus oil is theoretically novel (slow release) but evidence base is much smaller than for fish oil triglyceride/ester forms.

Side effects and drug interactions

Common Potential side effects

Generally well tolerated — omega-3 food oil
Fish/shellfish allergy cross-reactivity possible (copepod-derived) — monitor in allergic individuals
Fishy aftertaste possible — take with meals to minimize
Blood thinning effects at high doses — monitor if on anticoagulants

Important Drug interactions

Anticoagulants/antiplatelets — omega-3 fatty acids have mild antiplatelet activity; monitor if on blood thinners
Blood pressure medications — additive blood pressure effects at high omega-3 doses; monitor

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Frequently asked questions about Calanus® Oil (Arctic Zooplankton Omega-3 Wax Esters)

What is Calanus Oil?

Calanus® Oil (Zooca / Aker BioMarine) is a unique omega-3 rich oil from the Arctic copepod Calanus finmarchicus — providing long-chain omega-3 fatty acids (EPA and SPA — stearidonic acid) in a rare wax ester rather than triglyceride form.

What is Calanus Oil used for?

Calanus Oil is researched primarily for Cardiovascular, Metabolic Health, and Anti-Inflammatory. Calanus Oil supplementation significantly improved diastolic heart function markers and cardiovascular health parameters vs. placebo in prediabetic women.

What is the recommended dosage of Calanus Oil?

The clinically studied dose is 2 g/day (capsules); clinical studies 2-4 g/day. Always follow the product label and check with a healthcare provider for personal advice.

Is Calanus Oil safe, and does it have side effects?

For most healthy adults, Calanus Oil is well tolerated at studied doses. Reported effects can include: Generally well tolerated — omega-3 food oil Fish/shellfish allergy cross-reactivity possible (copepod-derived) — monitor in allergic individuals It may also interact with some medications. Calanus Oil is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Calanus Oil interact with any medications?

Possible interactions include: Anticoagulants/antiplatelets — omega-3 fatty acids have mild antiplatelet activity; monitor if on blood thinners Blood pressure medications — additive blood pressure effects at high omega-3 doses; monitor If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Calanus Oil?

NutraSmarts rates the evidence for Calanus Oil as Moderate (3 out of 5). It is backed by 1 clinical trial and 1 cited reference summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Burhop M, Schuchardt JP, Nebl J, et al. Marine Oil from C. finmarchicus Enhances Glucose Homeostasis and Liver Insulin Resistance in Obese Prediabetic Individuals. Nutrients. 2022;14(2)..PubMedUsed to support: Randomized trial of Calanus finmarchicus oil improving glucose homeostasis in prediabetic individuals.