What is the recommended dose of Fish Oil?

- **General health minimum:** 250mg combined EPA+DHA per day (can get from 2 servings of fatty fish per week) - **For cardiovascular benefit (triglycerides):** 2-4g combined EPA+DHA per day - **For...

Is Fish Oil safe to take daily?

Fish Oil is rated "Use Caution" based on clinical evidence. - **Common:** Fishy taste/burps, GI symptoms (nausea, burping, gas, abdominal pain), diarrhea - **Dose-dependent (>1g/day):** Atrial fibrillation, risk rises sharply above 1g/day in people with cardiovascular disease. Highest risk at 4g/day

Does Fish Oil interact with any medications?

Fish Oil has 8 known drug interactions, including interactions with Vitamin D, Cyclosporine, Tacrolimus. Check with your doctor before combining with prescription medications.

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Ingredient Research

Graded against 173,636 supplements + 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD

Fish Oil

STRONG EVIDENCEFatty AcidLast updated April 5, 2026

AVELOR SUMMARY

Fish oil delivers EPA and DHA, the two omega-3 fatty acids your body actually uses. Backed by 138 RCTs, 20 meta-analyses, and 243,000+ participants, our research confirms fish oil reliably and significantly reduces triglycerides. It also shows meaningful benefits for depression symptoms and inflammatory conditions. However, it does NOT reduce cardiovascular events (heart attacks, strokes) in most populations, a critical distinction that many supplement companies ignore. At high doses (>1g/day), there's a dose-dependent atrial fibrillation risk in people with cardiovascular disease.

EVIDENCE GRADES

TriglyceridesStrong, 47 studies, 15,492 participants, large improvement

Depression SymptomsStrong

Inflammation (CRP)Strong

Blood PressureModerate

LDL CholesterolMixed effect, may actually increase LDL slightly

HDL CholesterolMixed effect

Cardiovascular EventsNo effect in most populations

WHAT IT DOES

Dramatically reduces triglycerides, Grade A evidence. The most reliable and clinically significant benefit. Large effect size across 47 studies.
Reduces depression symptoms, Grade A evidence. EPA appears more effective than DHA for mood benefits. Works best as adjunct to treatment.
Reduces inflammatory markers, Grade A evidence for CRP reduction. Useful for inflammatory conditions like rheumatoid arthritis.
Modestly lowers blood pressure, Grade B evidence, especially above 2g/day EPA+DHA.
Does NOT prevent heart attacks/strokes, Despite decades of marketing, Grade D evidence for cardiovascular event prevention in most populations.
Mixed effect on LDL, May actually slightly increase LDL cholesterol in some people while improving other lipid markers.

OPTIMAL DOSAGE

General health minimum: 250mg combined EPA+DHA per day (can get from 2 servings of fatty fish per week)
For cardiovascular benefit (triglycerides): 2-4g combined EPA+DHA per day
For depression: 1-2g per day (EPA-dominant formulations preferred)
For inflammation: 2-4g per day
American Heart Association recommendation: 1g daily for cardiovascular benefit
Pregnancy: Increase DHA by at least 200mg/day
Breastfeeding: 1,000mg combined EPA+DHA per day
Best form: Triglyceride or phospholipid form (krill oil), more stable against oxidation than ethyl ester form
Timing: Take with meals containing fat. Reduces fishy burps.
With food: Yes, always take with food for better absorption and tolerability.

Scan a supplement containing Fish Oil

DRUG INTERACTIONS

Vitamin DModerate

May raise HbA1c

Monitor HbA1c if diabetic.

CyclosporineMinor

Mildly raises drug levels

Monitor drug levels.

TacrolimusMinor

Raises drug levels

Inform transplant team. Keep fish oil dose consistent.

SirolimusMinor

Raises drug levels

May help personalize dosing.

Vitamin EMinor

May reduce vitamin E effects

Not clinically concerning at normal doses.

CYP3A4 substrate drugsUnknown

May raise drug levels

Be aware if on multiple CYP3A4 substrates.

Blood-pressure-lowering drugsUnknown

Additive BP reduction

Monitor BP. Usually beneficial.

OrlistatUnknown

Reduces fish oil absorption

May reduce fish oil effectiveness.

SAFETY PROFILE

Side Effects

Common: Fishy taste/burps, GI symptoms (nausea, burping, gas, abdominal pain), diarrhea
Dose-dependent (>1g/day): Atrial fibrillation, risk rises sharply above 1g/day in people with cardiovascular disease. Highest risk at 4g/day.
High-dose (4g/day): Increased bleeding risk (primarily with prescription EPA ethyl ester). Minimal to nonexistent at lower doses.
Possible: Mild liver function changes (slightly higher ALT), itching
Important context: At normal supplemental doses (1-2g/day), fish oil is very well tolerated for long periods.

Drug Interactions

Precautions

Pregnancy: Caution. Safe up to 3g/day combined EPA+DHA. Limited data on higher doses. Consider discontinuing during third trimester, limited observational evidence suggests increased bleeding risk after delivery.
Breastfeeding: Safe. 1,000mg/day recommended.
Cardiovascular disease: Dose-dependent atrial fibrillation risk. Sharp rise above 1g/day. European and UK agencies recommend permanent discontinuation of omega-3 ethyl esters if atrial fibrillation occurs.
Previous heart attacks: Increased stroke risk with fish oil supplementation.
Liver cirrhosis: Risk of decreased blood pressure and increased bleeding.
Colorectal cancer surgery: Possible increased perioperative/postsurgical complications.
Cardioverter defibrillator implant: Mixed evidence on proarrhythmic effects. Use with caution.
Seafood allergies: Little to no fish protein in purified fish oil, most allergic people tolerate it. However, case reports of anaphylaxis exist. Caution warranted.
Major depressive disorder: One case report of fish oil inducing hypomania.

Quality Concerns

This is a major issue for fish oil. Key concerns:

Some products contain less EPA/DHA than labeled. Others are within acceptable limits.
Soybean oil adulteration detected in the Brazilian market.
Higher-than-expected saturated fat in some products indicates poor purification.
Oxidation (rancidity) is common, studies from multiple countries find substantial proportions of supplements are significantly oxidized. Oxidized fish oil may be ineffective or even worsen lipid profiles.
Storage tips: Keep encapsulated, at room temperature, away from light and heat. Capsules > syrup for stability. Phospholipid forms (krill) > triglycerides > ethyl esters for oxidation resistance.
Mercury: Generally not a concern in purified fish oil (mercury binds to protein, not oil). Smaller fish (anchovy, sardine, mackerel) have lower pollutant levels.

WADA Status

Not Prohibited. Not on the 2026 WADA list.

WHO SHOULD BE CAREFUL

QUALITY CONCERNS

This is a major issue for fish oil. Key concerns:

Some products contain less EPA/DHA than labeled. Others are within acceptable limits.
Soybean oil adulteration detected in the Brazilian market.
Higher-than-expected saturated fat in some products indicates poor purification.
Oxidation (rancidity) is common, studies from multiple countries find substantial proportions of supplements are significantly oxidized. Oxidized fish oil may be ineffective or even worsen lipid profiles.
Storage tips: Keep encapsulated, at room temperature, away from light and heat. Capsules > syrup for stability. Phospholipid forms (krill) > triglycerides > ethyl esters for oxidation resistance.
Mercury: Generally not a concern in purified fish oil (mercury binds to protein, not oil). Smaller fish (anchovy, sardine, mackerel) have lower pollutant levels.

HOW AVELOR SCORES THIS

Present in proper dose (1-2g combined EPA+DHA, triglyceride form):✅ Green flag, well-studied, reliable for triglycerides and mood

Underdosed (<250mg combined EPA+DHA):⚠️ Yellow flag, below minimum effective dose

Ethyl ester form:⚠️ Yellow flag, more prone to oxidation, slightly less bioavailable than triglyceride form

No EPA/DHA breakdown on label:⚠️ Yellow flag, total "fish oil" doesn't tell you how much EPA+DHA you're actually getting

In a proprietary blend:⚠️ Yellow flag, impossible to verify EPA+DHA content

Above 4g/day in people with heart disease:🔴 Red flag, significant atrial fibrillation risk

CLINICAL REFERENCES

Reference identifiers on this page are being re-verified against PubMed. Some may not yet link to the paper named beside them.

**, Hu Y et al. "Marine Omega-3 Supplementation and Cardiovascular Disease: An Updated Meta-Analysis of 13 Randomized Controlled Trials." *J Am Heart Assoc*, 2019. Key finding: Marine omega-3 supplementation associated with lower risk of MI, CHD death, and total CHD.

Marine Omega-3 Supplementation and Cardiovascular Disease: An Updated Meta-Analysis of 13 Randomized Controlled Trials.. (2019). PMID: 31567003

**, Skulas-Ray AC et al. "Omega-3 Fatty Acids for the Management of Hypertriglyceridemia." *Circulation*, 2019. Key finding: AHA Science Advisory, 4g/day of EPA+DHA reduces triglycerides by 20-30%.

Omega-3 Fatty Acids for the Management of Hypertriglyceridemia.. (2019). PMID: 29387889

RELATED RESEARCH

Algae Omega-3

Cetylated Fatty AcidsTopical CFA cream reduced knee OA pain scores by 50% and improved physical function within 30 minute

DHADHA comprises 40% of brain PUFA and 60% of retinal fatty acids, it is literally a structural buildin

Emulsified Fish OilRandomized crossover trial enrolling 24 healthy adults

Quality Testing Intelligence

Based on independent third-party laboratory analysis

Category pass rate: ~90% of fish oil products passed content testing. Rancidity is the primary failure mode — ~10% of products are already oxidized before opening.

Common failures:

Rancidity: Some products oxidized (peroxide >5 meq/kg). Jamieson at 48 meq/kg = 9.6x over limit.

Form confusion: Ethyl ester vs triglyceride (TG is better absorbed but pricier)

Concentration variation: 250mg to 2,000mg EPA+DHA per serving

Form comparison:

Form: Absorption: Price: Notes

Triglyceride (rTG): HIGHEST (30-50% better): Premium: Carlson, WHC UnoCardio, Garden of Life

Ethyl Ester (EE): MODERATE: Standard: Most common form. InnovixLabs, GNC.

Phospholipid (Krill): HIGH (per mg): Most expensive: Lower total EPA+DHA per pill

Contamination risk: MODERATE. All tested products passed heavy metal testing. Mercury, lead, cadmium all below detection limits. Fish oil purification processes (molecular distillation) effectively remove contaminants.

Scan Your Fish Oil Supplement Browse all ingredients

Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated: April 5, 2026

Not medical advice. Based on published clinical research and systematic reviews.

Fish Oil · interaction landscape

6 flagged

Dangerous

Moderate

Timing

Pre-op

Safety

Fish Oil / Omega-3: Drug Interactions

Discuss with prescriber

Clinically significant interactions per published research. Talk to your prescriber or pharmacist before using this supplement if you take any of these.

Warfarin (Coumadin)
Omega-3 inhibits platelet aggregation, producing an additive anticoagulant effect on top of warfarin.
RiskIncreased bleeding risk and elevated INR.
ActionMonitor INR closely. Reduce dose if INR rises.
SourcePMID: 25062404
Clopidogrel (Plavix)
Dual antiplatelet effect.
RiskIncreased bleeding risk.
ActionMonitor for unusual bruising or bleeding.
SourceFDA label
High-dose Aspirin
Additive antiplatelet effect.
RiskIncreased bleeding.
ActionUse caution at omega-3 doses above 3g per day.
SourceClinical consensus

Use with caution

Moderate interactions. Monitoring, timing separation, or dose adjustment may be required.

Blood pressure medications
Omega-3 may lower BP modestly.
RiskHypotension when combined.
ActionMonitor BP when starting omega-3.
SourceClinical consensus
Orlistat (Alli)
Reduces fat absorption, including omega-3.
RiskReduced omega-3 efficacy.
ActionSeparate by 2 or more hours.
SourceFDA label

Stop 2 weeks before surgery

Bleeding risk from antiplatelet effect.

Educational information only. This is not medical advice. These statements have not been evaluated by the FDA. Talk to your prescriber before starting, stopping, or combining any supplement with prescription medication.

Discover More

Helps With

Heart Cholesterol Memory Cognition Inflammation

Related Ingredients

Omega-3 Vitamin D CoQ10

Explore

Browse All 834 Ingredients Browse All 20 Conditions

Ingredient Research

Graded against 173,636 supplements + 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD

Fish Oil

STRONG EVIDENCEFatty AcidLast updated April 5, 2026

AVELOR SUMMARY

EVIDENCE GRADES

TriglyceridesStrong, 47 studies, 15,492 participants, large improvement

Depression SymptomsStrong

Inflammation (CRP)Strong

Blood PressureModerate

LDL CholesterolMixed effect, may actually increase LDL slightly

HDL CholesterolMixed effect

Cardiovascular EventsNo effect in most populations

WHAT IT DOES

Dramatically reduces triglycerides, Grade A evidence. The most reliable and clinically significant benefit. Large effect size across 47 studies.
Reduces depression symptoms, Grade A evidence. EPA appears more effective than DHA for mood benefits. Works best as adjunct to treatment.
Reduces inflammatory markers, Grade A evidence for CRP reduction. Useful for inflammatory conditions like rheumatoid arthritis.
Modestly lowers blood pressure, Grade B evidence, especially above 2g/day EPA+DHA.
Does NOT prevent heart attacks/strokes, Despite decades of marketing, Grade D evidence for cardiovascular event prevention in most populations.
Mixed effect on LDL, May actually slightly increase LDL cholesterol in some people while improving other lipid markers.

OPTIMAL DOSAGE

General health minimum: 250mg combined EPA+DHA per day (can get from 2 servings of fatty fish per week)
For cardiovascular benefit (triglycerides): 2-4g combined EPA+DHA per day
For depression: 1-2g per day (EPA-dominant formulations preferred)
For inflammation: 2-4g per day
American Heart Association recommendation: 1g daily for cardiovascular benefit
Pregnancy: Increase DHA by at least 200mg/day
Breastfeeding: 1,000mg combined EPA+DHA per day
Best form: Triglyceride or phospholipid form (krill oil), more stable against oxidation than ethyl ester form
Timing: Take with meals containing fat. Reduces fishy burps.
With food: Yes, always take with food for better absorption and tolerability.

Scan a supplement containing Fish Oil

DRUG INTERACTIONS

Vitamin DModerate

May raise HbA1c

Monitor HbA1c if diabetic.

CyclosporineMinor

Mildly raises drug levels

Monitor drug levels.

TacrolimusMinor

Raises drug levels

Inform transplant team. Keep fish oil dose consistent.

SirolimusMinor

Raises drug levels

May help personalize dosing.

Vitamin EMinor

May reduce vitamin E effects

Not clinically concerning at normal doses.

CYP3A4 substrate drugsUnknown

May raise drug levels

Be aware if on multiple CYP3A4 substrates.

Blood-pressure-lowering drugsUnknown

Additive BP reduction

Monitor BP. Usually beneficial.

OrlistatUnknown

Reduces fish oil absorption

May reduce fish oil effectiveness.

SAFETY PROFILE

Side Effects

Common: Fishy taste/burps, GI symptoms (nausea, burping, gas, abdominal pain), diarrhea
Dose-dependent (>1g/day): Atrial fibrillation, risk rises sharply above 1g/day in people with cardiovascular disease. Highest risk at 4g/day.
High-dose (4g/day): Increased bleeding risk (primarily with prescription EPA ethyl ester). Minimal to nonexistent at lower doses.
Possible: Mild liver function changes (slightly higher ALT), itching
Important context: At normal supplemental doses (1-2g/day), fish oil is very well tolerated for long periods.

Drug Interactions

Precautions

Pregnancy: Caution. Safe up to 3g/day combined EPA+DHA. Limited data on higher doses. Consider discontinuing during third trimester, limited observational evidence suggests increased bleeding risk after delivery.
Breastfeeding: Safe. 1,000mg/day recommended.
Cardiovascular disease: Dose-dependent atrial fibrillation risk. Sharp rise above 1g/day. European and UK agencies recommend permanent discontinuation of omega-3 ethyl esters if atrial fibrillation occurs.
Previous heart attacks: Increased stroke risk with fish oil supplementation.
Liver cirrhosis: Risk of decreased blood pressure and increased bleeding.
Colorectal cancer surgery: Possible increased perioperative/postsurgical complications.
Cardioverter defibrillator implant: Mixed evidence on proarrhythmic effects. Use with caution.
Seafood allergies: Little to no fish protein in purified fish oil, most allergic people tolerate it. However, case reports of anaphylaxis exist. Caution warranted.
Major depressive disorder: One case report of fish oil inducing hypomania.

Quality Concerns

This is a major issue for fish oil. Key concerns:

Some products contain less EPA/DHA than labeled. Others are within acceptable limits.
Soybean oil adulteration detected in the Brazilian market.
Higher-than-expected saturated fat in some products indicates poor purification.
Oxidation (rancidity) is common, studies from multiple countries find substantial proportions of supplements are significantly oxidized. Oxidized fish oil may be ineffective or even worsen lipid profiles.
Storage tips: Keep encapsulated, at room temperature, away from light and heat. Capsules > syrup for stability. Phospholipid forms (krill) > triglycerides > ethyl esters for oxidation resistance.
Mercury: Generally not a concern in purified fish oil (mercury binds to protein, not oil). Smaller fish (anchovy, sardine, mackerel) have lower pollutant levels.

WADA Status

Not Prohibited. Not on the 2026 WADA list.

WHO SHOULD BE CAREFUL

QUALITY CONCERNS

This is a major issue for fish oil. Key concerns:

Some products contain less EPA/DHA than labeled. Others are within acceptable limits.
Soybean oil adulteration detected in the Brazilian market.
Higher-than-expected saturated fat in some products indicates poor purification.
Oxidation (rancidity) is common, studies from multiple countries find substantial proportions of supplements are significantly oxidized. Oxidized fish oil may be ineffective or even worsen lipid profiles.
Storage tips: Keep encapsulated, at room temperature, away from light and heat. Capsules > syrup for stability. Phospholipid forms (krill) > triglycerides > ethyl esters for oxidation resistance.
Mercury: Generally not a concern in purified fish oil (mercury binds to protein, not oil). Smaller fish (anchovy, sardine, mackerel) have lower pollutant levels.

HOW AVELOR SCORES THIS

Present in proper dose (1-2g combined EPA+DHA, triglyceride form):✅ Green flag, well-studied, reliable for triglycerides and mood

Underdosed (<250mg combined EPA+DHA):⚠️ Yellow flag, below minimum effective dose

Ethyl ester form:⚠️ Yellow flag, more prone to oxidation, slightly less bioavailable than triglyceride form

No EPA/DHA breakdown on label:⚠️ Yellow flag, total "fish oil" doesn't tell you how much EPA+DHA you're actually getting

In a proprietary blend:⚠️ Yellow flag, impossible to verify EPA+DHA content

Above 4g/day in people with heart disease:🔴 Red flag, significant atrial fibrillation risk

CLINICAL REFERENCES

Reference identifiers on this page are being re-verified against PubMed. Some may not yet link to the paper named beside them.

Marine Omega-3 Supplementation and Cardiovascular Disease: An Updated Meta-Analysis of 13 Randomized Controlled Trials.. (2019). PMID: 31567003

**, Skulas-Ray AC et al. "Omega-3 Fatty Acids for the Management of Hypertriglyceridemia." *Circulation*, 2019. Key finding: AHA Science Advisory, 4g/day of EPA+DHA reduces triglycerides by 20-30%.

Omega-3 Fatty Acids for the Management of Hypertriglyceridemia.. (2019). PMID: 29387889

RELATED RESEARCH

Algae Omega-3

Cetylated Fatty AcidsTopical CFA cream reduced knee OA pain scores by 50% and improved physical function within 30 minute

DHADHA comprises 40% of brain PUFA and 60% of retinal fatty acids, it is literally a structural buildin

Emulsified Fish OilRandomized crossover trial enrolling 24 healthy adults

Quality Testing Intelligence

Based on independent third-party laboratory analysis

Category pass rate: ~90% of fish oil products passed content testing. Rancidity is the primary failure mode — ~10% of products are already oxidized before opening.

Common failures:

Rancidity: Some products oxidized (peroxide >5 meq/kg). Jamieson at 48 meq/kg = 9.6x over limit.

Form confusion: Ethyl ester vs triglyceride (TG is better absorbed but pricier)

Concentration variation: 250mg to 2,000mg EPA+DHA per serving

Form comparison:

Form: Absorption: Price: Notes

Triglyceride (rTG): HIGHEST (30-50% better): Premium: Carlson, WHC UnoCardio, Garden of Life

Ethyl Ester (EE): MODERATE: Standard: Most common form. InnovixLabs, GNC.

Phospholipid (Krill): HIGH (per mg): Most expensive: Lower total EPA+DHA per pill

Scan Your Fish Oil Supplement Browse all ingredients

Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated: April 5, 2026

Not medical advice. Based on published clinical research and systematic reviews.

Fish Oil · interaction landscape

6 flagged

Dangerous

Moderate

Timing

Pre-op

Safety

Fish Oil / Omega-3: Drug Interactions

Discuss with prescriber

Clinically significant interactions per published research. Talk to your prescriber or pharmacist before using this supplement if you take any of these.

Warfarin (Coumadin)
Omega-3 inhibits platelet aggregation, producing an additive anticoagulant effect on top of warfarin.
RiskIncreased bleeding risk and elevated INR.
ActionMonitor INR closely. Reduce dose if INR rises.
SourcePMID: 25062404
Clopidogrel (Plavix)
Dual antiplatelet effect.
RiskIncreased bleeding risk.
ActionMonitor for unusual bruising or bleeding.
SourceFDA label
High-dose Aspirin
Additive antiplatelet effect.
RiskIncreased bleeding.
ActionUse caution at omega-3 doses above 3g per day.
SourceClinical consensus

Use with caution

Moderate interactions. Monitoring, timing separation, or dose adjustment may be required.

Blood pressure medications
Omega-3 may lower BP modestly.
RiskHypotension when combined.
ActionMonitor BP when starting omega-3.
SourceClinical consensus
Orlistat (Alli)
Reduces fat absorption, including omega-3.
RiskReduced omega-3 efficacy.
ActionSeparate by 2 or more hours.
SourceFDA label

Stop 2 weeks before surgery

Bleeding risk from antiplatelet effect.

Discover More

Helps With

Heart Cholesterol Memory Cognition Inflammation

Related Ingredients

Omega-3 Vitamin D CoQ10

Explore

Browse All 834 Ingredients Browse All 20 Conditions