Best Cod Liver Oil Supplements 2026: Cost per Effective Dose
Top pick for Cod Liver Oil: NOW Foods Cod Liver Oil, 650mg, 250 Softgels — 650mg cod liver oil (softgel size) per 1 softgel, None claimed, $0.05/day.
Registry check · Cod Liver Oil
Does anyone independently verify Cod Liver Oil supplements?
We could not confirm a single one of these 5 products in any registry, and none of them claims otherwise. Not one brand here displays a certification mark, so on independent verification all 5 start level.
5 checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What 4 Cod Liver Oil labels show
Priced per day, these cod liver oil products run $0.05 to $0.64 — a 13× gap between the cheapest and dearest cod liver oil here, across 3 brands.
Which row that favours is not obvious: NOW Foods NOW Foods Cod Liver Oil, 650mg, 250 Softgels is cheapest per serving at $0.05, but its serving sits below the median here, so part of that price gap is simply a smaller capsule.
All Cod Liver Oil Supplements Compared
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | Pick | Buy |
|---|---|---|---|---|---|---|
| NOW Foods Cod Liver Oil, 650mg, 250 Softgels | NOW Foods | 650mg cod liver oil (softgel size) / 1 softgel | $0.05 | None claimed | Buy | |
| NOW Foods Cod Liver Oil Extra Strength, 1,000mg, 180 Softgels | NOW Foods | 1000mg cod liver oil (softgel size) / 1 softgel | $0.10 | None claimed | Buy | |
| Nordic Naturals Arctic Cod Liver Oil, Lemon, 180 Softgels | Nordic Naturals | 750mg total omega-3 (EPA+DHA) / 2 softgels | $0.47 | None claimed | Buy | |
| Carlson Norwegian Cod Liver Oil, Lemon, 500mL | Carlson | 1100mg total omega-3 (EPA+DHA) / 1 tsp (5mL) | $0.64 | None claimed | Buy |
In-Depth Cod Liver Oil Guides
Go deeper on cod liver oil — by goal, by form, and what the evidence actually supports:
Our Picks
Lowest Cost: NOW Foods Cod Liver Oil, 650mg, 250 Softgels
650mg cod liver oil (softgel size) per 1 softgel. None claimed. $0.05/day. 250 servings per container at $13.46.
The shelf · Cod Liver Oil
Pack sizes differ 5×, so the shelf price tells you very little
Carlson Norwegian Cod Liver Oil, Lemon, 250mL holds 50 servings and NOW Foods Cod Liver Oil, 650mg, 250 Softgels holds 250 — the same shelf price buys 5× more of one than the other, which is why all 5 rows above are priced per day. On that basis NOW Foods Cod Liver Oil, 650mg, 250 Softgels is the cheapest at 5¢ and Carlson Norwegian Cod Liver Oil, Lemon, 250mL the dearest at 66¢.
Method: the 5 Cod Liver Oil products above, compared on label facts — serving size, servings per container, form, price. Not a dosing recommendation.
The evidence · Cod Liver Oil
What the published reviews of Cod Liver Oil concluded
- Prevention of covid-19 and other acute respiratory infections with cod liver oil supplementation, a low dose vitamin D supplement: quadruple blinded, randomised placebo controlled trial. · BMJ (Clinical research ed.), 2022
“Supplementation with cod liver oil in the winter did not reduce the incidence of SARS-CoV-2 infection, serious covid-19, or other acute respiratory infections compared with placebo.”
- Cod liver oil (n-3 fatty acids) as an non-steroidal anti-inflammatory drug sparing agent in rheumatoid arthritis. · Rheumatology (Oxford, England), 2008
“This study suggests that cod liver oil supplements containing n-3 fatty acids can be used as NSAID-sparing agents in RA patients.”
- Fatty acid composition in maternal milk and plasma during supplementation with cod liver oil. · European journal of clinical nutrition, 1998
“Dietary intake of DHA is reflected in the concentration of DHA in breast milk, without affecting the concentration of AA or tocopherol.”
Method: PubMed searched in humans for randomised trials with Cod Liver Oil in the title; these 3 of the 3 that qualified are shown with the authors’ own conclusion quoted rather than summarised. What it cannot tell you: whether Cod Liver Oil will work for you — each of these reports an average across trials published 1998–2022, and null findings are shown here as readily as positive ones.
How these 4 Cod Liver Oil products were ranked
Not one of these 4 cod liver oil products could be confirmed in the NSF, USP or Informed Sport registries, so verification separates none of them and the ranking falls to cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever cod liver oil you buy. Full methodology.