Fatty Acid
Cod Liver Oil
Also known as: CLO
Traditional omega-3 source also providing vitamins A and D. Good winter supplement but watch vitamin A intake.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Omega-3s
- Vitamin D
- Vitamin A
- Traditional health
How it works
- EPA and DHA from fish liver
- Natural vitamin A and D
- Traditional remedy
Dosage
- Typical range
- 1-2 tsp or 2-4 capsules daily
- Timing
- With food
- With food
- Yes
- Duration
- Monitor vitamin A intake
- Special populations
- Winter months, northern latitudes
Forms
- Liquid
- Softgel
Safety
Common side effects
- Fishy taste
- Burps
Contraindications
- Pregnancy (high doses vitamin A)
Products containing Cod Liver Oil
Top-scoring supplements in our catalog that list Cod Liver Oil on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
See all products →
Known interactions
- Synergywith curcumin
Fat improves curcumin absorption
- Warningwith omega-3
Fish oil may increase bleeding risk with warfarin
- Cautionwith omega-3
Fish oil adds to aspirin's antiplatelet effect
- Synergywith vitamin d
Fat improves vitamin D absorption
- Synergywith omega-3
Vitamin E protects omega-3 fats from oxidation
Evidence notes
Traditional source of A, D, and omega-3s
Grade A: Multiple well-designed human trials support the main claims.
Related in Fatty Acid
Check a full stack
Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.
Open the checkerWhere does Cod Liver Oil fit in your stack?
Answer two questions and get a stack graded on research — every ingredient scored on the evidence behind it, not the marketing.
Build my stack2 questions · free · no account needed to start
Also on iPhone — get the free app
Evidence-based supplement guides, no spam
We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.
Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.