Cheapest Pharmaceutical Grade Fish Oil Concentrate on iHerb

Ranked by real cost per 100 mg of Pharmaceutical Grade Fish Oil Concentrate — cheapest value first.

Prices updated Jul 25, 2026 · 9 products · Prices in USD

The priciest option here costs about 24.4× more per 100 mg of Pharmaceutical Grade Fish Oil Concentrate than the best-value pick Natural Factors. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
Natural Factors, Rx Omega-3, 240 Softgels (630 mg per Softgel)
Natural Factors, Rx Omega-3, 240 Softgels (630 mg per Softgel)
Natural Factors
2,340 mg12044.770.016View on iHerb →
2
Natural Factors, Rx Omega-3, 120 Softgels (630 mg per Softgel)
Natural Factors, Rx Omega-3, 120 Softgels (630 mg per Softgel)
Natural Factors
2,340 mg6026.570.019View on iHerb →
3
Natural Factors, RxOmega-3 Ultra Strength, 150 Softgels (1,075 mg per Softgel)
Natural Factors, RxOmega-3 Ultra Strength, 150 Softgels (1,075 mg per Softgel)
Natural Factors
3,140 mg7547.570.020View on iHerb →
4
Natural Factors, RxOmega-3 Ultra Strength with Vitamin D3, 150 Softgels
Natural Factors, RxOmega-3 Ultra Strength with Vitamin D3, 150 Softgels
Natural Factors
3,200 mg7549.670.021View on iHerb →
5
Natural Factors, RxOmega-3 Ultra Strength, 60 Softgels (1,075 mg per Softgel)
Natural Factors, RxOmega-3 Ultra Strength, 60 Softgels (1,075 mg per Softgel)
Natural Factors
3,140 mg3025.170.027View on iHerb →
6
Natural Factors, RxOmega-3 Ultra Strength with Vitamin D3, 60 Softgels
Natural Factors, RxOmega-3 Ultra Strength with Vitamin D3, 60 Softgels
Natural Factors
3,200 mg3026.570.028View on iHerb →
7
Natural Factors, WomenSense®, RxOmega-3, 120 Enteripure™ Softgels
Natural Factors, WomenSense®, RxOmega-3, 120 Enteripure™ Softgels
Natural Factors
1,070 mg6020.970.033View on iHerb →
8
Natural Factors, RegenerLife®, Higher Thoughts™, 90 Softgels
Natural Factors, RegenerLife®, Higher Thoughts™, 90 Softgels
Natural Factors
360 mg4522.460.139View on iHerb →
9
Natural Factors, RxOmega-3, 60  Softgels (630 mg per Softgel)
Natural Factors, RxOmega-3, 60 Softgels (630 mg per Softgel)
Natural Factors
2,340 mg218.170.388View on iHerb →

How we rank Pharmaceutical Grade Fish Oil Concentrate

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.