Metabolic Dietary supplement

Omega-3 (Fish Oil EPA/DHA)

Fish Oil · EPA/DHA · Omega-3 Fatty Acids

Evidence: Studied in humans. Example dose: finalize with a provider. Not a fact-check stamp.

2,000-3,000mg combined EPA+DHA daily – 2-4 g Oral Once or twice daily with food

Omega-3 fatty acids are long-chain polyunsaturated fatty acids (PUFAs) derived primarily from marine sources (fatty fish, krill, algae). The two most clinically relevant omega-3s are eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3). A third plant-derived omega-3, alpha-linolenic acid (ALA), is only marginally converted to EPA/DHA in humans (~5% EPA, <1% DHA conversion), making marine sources essential for clinically meaningful blood levels.

Quick Start

Route

Oral

Start low

2,000-3,000mg Oral

Frequency

Once or twice daily with food

Timing

Anytime

Starting dose. 2,000-3,000mg — Combined EPA+DHA daily

Take with a meal containing fat to optimize absorption (fat increases omega-3 bioavailability 3-fold). Split dosing (morning + evening) reduces fishy burps. Refrigerate after opening to prevent oxidation.

❋

Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.

Tiered Protocols · lowest first

Conservative start

2,000-3,000mg combined EPA+DHA daily · Oral · Once or twice daily with food

conservative starter

2,000-3,000mg combined EPA+DHA daily

Once or twice daily with food

Standard

Cardiovascular & Inflammatory Control

2-4 g · Oral · Daily

human clinical trial · Bhatt et al. 2018 (N Engl J Med)

Dose refers to total combined EPA + DHA, not the total weight of the fish oil pill. Quality and heavy metal testing are critical.

2-4 g

Daily

◆

How it works

EPA and DHA incorporate into cell membrane phospholipids, altering membrane fluidity, receptor function, and signal transduction. Once incorporated, they serve as substrates for specialized pro-resolving mediators (SPMs) including resolvins (E-series from EPA, D-series from DHA), protectins, and maresins. These SPMs actively resolve inflammation rather than merely blocking it - a fundamentally different mechanism than NSAIDs or steroids.

EPA competes with arachidonic acid (AA, an omega-6) for cyclooxygenase and lipoxygenase enzymes, shifting eicosanoid production toward less inflammatory 3-series prostaglandins and 5-series leukotrienes. This reduces pro-inflammatory signaling, platelet aggregation, and vasoconstriction. EPA also directly lowers hepatic triglyceride synthesis by activating PPAR-alpha and suppressing SREBP-1c.

DHA is highly concentrated in the brain (up to 30% of total phospholipid fatty acids in gray matter) and retina, where it supports synaptic membrane fluidity, neurogenesis, BDNF expression, and visual pigment function. DHA is also a precursor to neuroprotectin D1, which protects neurons from oxidative and ischemic injury.

What to expect

Early

Days 1–7

Weeks 1-2: Subjective changes minimal. Digestive adjustment period (fishy burps possible).

Evidence

HumanStrong

AnimalPresent

In-vitroPresent

Each reference below was re-fetched from its PubMed record, and the quoted sentence was confirmed to appear in that abstract and to support the claim it sits under. Follow any of them to read the source.

Long chain fatty acids influence inflammation through a variety of mechanisms; many of these are mediated by, or at least associated with, changes in fatty acid composition of cell membranes.

Long chain fatty acids influence inflammation through a variety of mechanisms; many of these are mediated by, or at least associated with, changes in fatty acid composition of cell membranes.

Omega-3 fatty acids and inflammatory processes. Nutrients · 2010 · PMID 22254027

Evidence scope. Narrative review; general long-chain fatty-acid mechanism, not a test of the displayed oral dose.

Claims we could not support

No abstract we checked supports these for this molecule at this route. That is not the same as saying they are false — it marks where the evidence is missing.

Dose/route: 2,000-3,000mg combined EPA+DHA daily via Oral, Once or twice daily with food. No checked live PubMed abstract supported this complete molecule/formulation/route/dose/frequency combination.

Primary safety claim: Fishy aftertaste or burps (reduced by refrigeration, enteric coating, or high-quality purification). No checked live abstract directly established this as the primary concern for the card's exact formulation and regimen.

Interactions & stacking

Two different questions: what is documented about running these together, and what is documented about drawing them into the same syringe. A good pharmacological partner can still have to be pinned separately.

Documented together

StatinsOmega-3s are commonly co-administered with statins for residual CV risk. High-EPA formulations (icosapent ethyl) are specifically approved for this indication.

Vitamin DBoth are fat-soluble and share similar absorption pathways. Co-administration with a fat-containing meal optimizes both.

CurcuminComplementary anti-inflammatory mechanisms - omega-3 via SPM production, curcumin via NF-kB inhibition.

Vitamin EVitamin E protects omega-3s from oxidation in cell membranes, preserving their biological activity. Most quality fish oils include a small amount of mixed tocopherols for stability.

Keep separate

Anticoagulants (warfarin, DOACs)High-dose omega-3 (>3g/day) may mildly increase bleeding time. Combined with anticoagulants, this could modestly raise bleeding risk - monitor and discuss with prescriber. Clinical bleeding events remain rare.

High-dose antiplateletsSimilar mild additive antiplatelet effect - typically well-tolerated but worth noting for patients on dual antiplatelet therapy.

Check any specific pair in the Stack & Interaction Checker, which answers both questions separately. Absence of a documented conflict is not evidence of safety.

Pharmacokinetics

Illustrative plasma concentration · 23 h

Half-life

EPA: ~37 hours in plasma phospholipids. DHA: ~60-90 days in membrane incorporation (tissue half-life much longer than plasma).

Peak · Tmax

~5-9 hours

Plasma peak after oral dose (triglyceride form). Ethyl ester ~7-10 hours.

Elimination

Plasma clearance over 24-48 hours. Tissue incorporation and turnover takes 2-6 months for full stabilization.

Bioavailability

Triglyceride form: ~90% absorption with fatty meal. Ethyl ester: ~60-70% with fatty meal, dramatically reduced (<20%) on empty stomach. Krill phospholipid form: ~65% but incorporated efficiently into membranes.

Duration of action

Cell membrane incorporation persists for weeks to months after dosing stops. Steady-state omega-3 index typically reaches target after 3-4 months of consistent dosing.

Clearance

Metabolized via beta-oxidation and incorporated into cell membrane phospholipids. Some conversion between EPA and DHA via elongation/desaturation pathways. No significant CYP interactions.

Storage. Refrigerate after opening to prevent oxidation. Store liquid fish oils in refrigerator at all times. Softgels stable at room temperature unopened; refrigerate after opening. Use within 3-6 months of opening. Rancid fish oil smells strongly fishy/acrid and should be discarded - oxidized omega-3 may be pro-inflammatory rather than anti-inflammatory.

Regulatory status

Classified as a dietary supplement in the US. Prescription form (icosapent ethyl, Vascepa) approved for hypertriglyceridemia and cardiovascular risk reduction in high-risk patients. Over-the-counter fish oils vary enormously in quality - look for IFOS 5-star certification, TOTOX <26, and third-party testing for heavy metals and PCBs.

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