Omega-3 Intake & Index Calculator (EPA + DHA)

Determines therapeutic and maintenance dosages of active EPA and DHA fatty acids according to clinical indications and laboratory biomarkers.

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Result

Daily Target EPA + DHA: 500 mg/day
Eicosapentaenoic Acid (EPA): 300 mg/day
Docosahexaenoic Acid (DHA): 200 mg/day
Fatty Fish Dietary Equivalent: 2.0 servings/wk

Take Omega-3 supplements alongside a fat-containing meal — this improves triglyceride-form bioavailability by 3–5 fold.

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How it is calculated

Built upon GOED, AHA, and ISSFAL consensus standards. Targets an erythrocyte membrane Omega-3 Index > 8% for optimal cardioprotection.

Formula

General Health: 500 mg; Cardiovascular: 1000 mg; Hypertriglyceridemia: 2000–4000 mg; Pregnancy: 600 mg (high DHA); Mood: 1000–2000 mg (EPA:DHA ≥ 2:1); Athlete: 1500–2000 mg.

Limits of the method

Dosages exceeding 3000–4000 mg/day have antiplatelet effects and require medical supervision in patients on anticoagulants.

Sources of the method

This calculation is for reference only and is not medical advice, a diagnosis or a prescription. If you have a medical condition, are pregnant, take medication or have any doubts, discuss the result with a physician or a qualified nutrition professional.

How to Choose and Take Omega-3 Supplements

Inspect the active label (EPA + DHA)

A front label reading '1,000 mg fish oil' frequently contains a mere 300 mg of combined EPA+DHA. Always sum the specific milligram amounts of EPA and DHA.

Select the optimal lipid form (rTG or TG)

Re-esterified triglycerides (rTG) provide superior bioavailability compared to generic synthetic ethyl esters (EE).

Verify the oxidation index (TOTOX)

High-grade fish oil maintains a TOTOX score < 26 and carries IFOS (International Fish Oil Standards) certification, free from rancid fishy odors.

Clinical Dosing Protocols

Prevention1000 mg EPA+DHA daily

Healthy adult without fish intake

Individual consumes no seafood. 1 concentrated capsule (650 mg EPA + 350 mg DHA) fully covers baseline requirements.

Sustains a healthy Omega-3 Index above 8%.

Mood Protocol1500 mg (EPA ≥ 1000 mg)

Support for mild depression & anxiety

ISANR clinical meta-analyses show therapeutic efficacy strictly requires EPA outnumbering DHA by at least 2:1.

EPA effectively crosses the blood-brain barrier to suppress PGE2 neuroinflammation.

Pregnancy600 mg (DHA ≥ 400 mg)

2nd & 3rd pregnancy trimesters

DHA emphasis is crucial for building fetal neural membranes and retinal photoreceptors.

Associated with an 11–15% reduction in premature delivery risk.

Understanding the Harris-von Schacky Omega-3 Index

In 2004, Dr. William Harris and Dr. Clemens von Schacky proved that erythrocyte membrane Omega-3 content mirrors 120-day myocardial fatty acid incorporation. An index > 8% correlates with a 90% reduction in sudden cardiac death risk compared to an index < 4%.

Plant-based ALA versus marine EPA & DHA

Alpha-linolenic acid (ALA) in flax and walnuts converts via human elongases and desaturases to active EPA at an inefficient 5–8%, and to DHA at less than 0.5–1%. Hence, terrestrial seed oils cannot replace marine Omega-3 sources for systemic anti-inflammatory targets.

Therapeutic Omega-3 Dosing (EPA + DHA) per AHA & GOED

Target Indication	EPA + DHA Dose	Target Ratio EPA:DHA
General wellness & prevention	500 mg/day	1.5 : 1 (balanced)
Secondary cardioprotection (CAD)	1000 mg/day	2 : 1 EPA dominant
Hypertriglyceridemia (TG > 2.3 mmol/L)	2000 – 4000 mg/day	High-potency EPA (Vascepa/Lovaza)
Pregnancy and lactation	600 mg/day	DHA dominant (1 : 2 or 1 : 3)
Athletic recovery & joints	1500 – 2000 mg/day	2 : 1 EPA dominant (mitigates DOMS)

Highly concentrated formulas (> 80–90% purity) spare hepatic lipid load from saturated carrier fats.

Frequently asked questions

What distinguishes natural triglycerides (TG) from ethyl esters (EE)?

Triglycerides (TG) represent natural marine fat. Ethyl esters (EE) result from industrial transesterification to concentrate fatty acids. The re-esterified rTG form demonstrates 40–70% superior absorption over EE when taken with lighter meals.

Can Omega-3 capsules be taken on an empty stomach?

Strongly discouraged. Without dietary fat to trigger pancreatic lipase and bile flow, fat assimilation is blunted and fishy regurgitation is likely.

Which seafood provides the highest EPA and DHA concentrations?

Wild mackerel (up to 2500 mg per 100 g), Atlantic herring (2000 mg), wild sockeye salmon (1500 mg), sardines (1400 mg), and cod liver.

Is mercury contamination a risk in fish oil supplements?

Pharmaceutical-grade fish oil undergoes molecular distillation, stripping heavy metals (mercury, lead, cadmium) and PCBs. IFOS 5-star certification guarantees absolute purity.

Is it necessary to cycle off Omega-3 supplements?

Omega-3s are essential fatty acids that cell membranes require continually. Unless you routinely consume 2–3 servings of wild oily fish weekly, cycling off is not recommended.

Review your lipid profile or calculate daily vitamin D targets:

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What next

Formula breakdowns, biomarker reference ranges and nutrition articles with cited sources are in the NutriFit knowledge base.

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