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The Best Fish Oil Supplements on Amazon

Updated By the HealthWorld editorial teamHow we pick

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Top picks at a glance

  1. 1
    Nordic Naturals Ultimate Omega

    Best overall

    Nordic Naturals Ultimate Omega

    Omega-3 1280 mg · Serving 2 softgels

  2. 2
    Sports Research Triple Strength Omega-3

    Best one-a-day

    Sports Research Triple Strength Omega-3

    Omega-3 1250 mg · Serving 1 softgel

  3. 3
    Nature Made Fish Oil 1200 mg

    Best budget, USP Verified

    Nature Made Fish Oil 1200 mg

    Fish oil 1200 mg · Form Softgel

Fish oil labels on Amazon are easy to misread: the big number on the front is often the total fish oil, not the omega-3s (EPA and DHA) you're paying for. We compared three of the best-known fish oils sold on Amazon, Nordic Naturals, Sports Research and Nature Made, by omega-3 per serving, softgels per day and testing.

Our picks

  1. Nordic Naturals Ultimate Omega

    #1Best overall

    Nordic Naturals Ultimate Omega

    1280 mg of omega-3 per 2-softgel serving in the triglyceride form, third-party purity tested, with a lemon flavor.

    Omega-3 1280 mgServing 2 softgelseBay Full facts →
  2. Sports Research Triple Strength Omega-3

    #2Best one-a-day

    Sports Research Triple Strength Omega-3

    1250 mg of omega-3 in a single softgel from wild Alaska pollock, with a burpless formula. One of the best-selling fish oils online.

    Omega-3 1250 mgServing 1 softgeleBay Full facts →
  3. Nature Made Fish Oil 1200 mg

    #3Best budget, USP Verified

    Nature Made Fish Oil 1200 mg

    USP Verified for quality and purity, with omega-3 EPA and DHA in 1200 mg fish oil softgels, a pharmacy classic with great value per serving. The 1200 mg is fish oil, not omega-3, so check EPA and DHA on the back.

    Fish oil 1200 mgForm SoftgeleBay Full facts →
Amazon's live top 100 in Fish oil

What to look for

EPA + DHA, not fish oil
Nordic Naturals lists 1280 mg of omega-3 per 2 softgels and Sports Research 1250 mg in one, while Nature Made's 1200 mg is the fish oil itself. Read the Supplement Facts for EPA and DHA per serving.
Softgels per serving
A serving can be one softgel or two. Compare the cost per serving of EPA + DHA, not the bottle price or softgel count, and use Subscribe & Save for a bottle you'll finish before its best-by date.
Purity testing over stars
USP Verified (Nature Made) and third-party purity testing (Nordic Naturals) are independent checks; star ratings aren't. A strong, rancid smell when you open the bottle is a reason not to take it.
Heat and the best-by date
Fish oil is sensitive to heat and time. Buy from Amazon or the brand, check the best-by date on arrival, and keep the bottle somewhere cool and dark once it's open.
Blood thinners and allergies
Ask your doctor first if you take blood thinners, have surgery coming up or have a fish allergy, since omega-3s can affect bleeding at higher doses.

Frequently asked questions

Which fish oil on Amazon has the most omega-3?

Of our picks, Nordic Naturals Ultimate Omega lists 1280 mg of omega-3 per 2-softgel serving and Sports Research Triple Strength 1250 mg in a single softgel. Nature Made's 1200 mg refers to the fish oil, so the omega-3 per softgel is only part of that number; check the label.

Which fish oil on Amazon is best for men or women?

The same products work for both. Pick by EPA + DHA per serving, how many softgels you're happy to take and testing. If you're pregnant or planning to be, ask your doctor which omega-3 and dose suit you.

Is fish oil from Amazon fresh?

Usually, but heat and time can make fish oil go rancid. Buy from Amazon or the brand, check the best-by date, and if the softgels smell strongly fishy or sour when you open the bottle, don't take them; contact the seller.

Triglyceride or ethyl ester: does it matter?

Nordic Naturals uses the triglyceride form, the form found naturally in fish. Some studies suggest it's absorbed a little better than the ethyl ester form, but taking any fish oil with a meal that contains fat helps absorption.

Sources