The most-trusted, most-available drugstore krill — but the lowest omega-3 dose per softgel on the list.
MegaRed is the krill oil almost everyone has heard of — the brand behind years of TV advertising, stocked in essentially every pharmacy, grocery, and big-box store in America. This is the Extra Strength 500 mg Antarctic krill softgel (90-count): a once-daily, phospholipid-bound omega-3 with naturally occurring astaxanthin, processed through MegaRed's 'PureTech' purification step for a notably clean, no-fishy-aftertaste profile. At roughly $0.33 per softgel the sticker price looks cheap and the brand reassurance is real.
The catch is dose: a single 500 mg krill softgel delivers only about 90 mg of combined EPA+DHA — the lowest active dose of any krill oil on our list — so once you normalise for the omega-3 you actually get, MegaRed is a premium-priced, convenience-first buy rather than a dose-per-dollar winner. Here's the honest breakdown.
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Read the complete Omega-3 guide →Phospholipid-bound EPA+DHA (krill oil format) — the right delivery form, but the absolute dose is the weak point. A single 500 mg krill softgel delivers only ~90 mg of combined omega-3 (roughly ~50 mg EPA / ~24 mg DHA), the lowest per-softgel active dose on the krill list and a fraction of a concentrated fish-oil capsule's 500-900 mg. Reaching even the general-wellness floor takes 3-6 softgels/day.
Manufactured by Reckitt (RB) under large-brand pharmaceutical-grade QC, with MegaRed's branded 'PureTech' purification removing salts and impurities for a clean oil. Antarctic krill naturally carries near-zero mercury/PCB load (lowest trophic level). The gap: MegaRed does not publish IFOS, IKOS, or third-party oxidation (TOTOX) certification — PureTech is a brand purity claim, not an independent audit.
Antarctic-sourced krill from a fishery managed under CCAMLR conservative quotas (~1% of estimated biomass annually). Krill is one of the better-managed marine sources and the lowest-contaminant marine omega-3 origin. MegaRed does not headline an MSC chain-of-custody mark the way some krill brands do, so provenance is credible but less explicitly certified than the Superba/NKO picks.
The ~$0.33/softgel sticker is the cheapest-looking on the krill list — but it's a dose illusion. At only ~90 mg combined EPA+DHA per softgel, the real cost is roughly $3.50-4.00 per gram of actives, among the most expensive once normalised. You pay a genuine brand-and-availability premium; the cheap sticker does not translate to cheap omega-3.
MegaRed's standout strength. The most-advertised, most-recognised, most-available krill brand in the US — in essentially every pharmacy and big-box store. PureTech processing plus the phospholipid form give it a genuinely clean, no-fishy-aftertaste, no-burp profile in a single once-daily softgel. For the convenience-and-trust buyer, this is the easiest krill oil to actually buy and stick with.
“Omega-3s in phospholipid form — easily absorbed by the body.”
Mechanistically real but modest. Krill's phospholipid-bound EPA+DHA do integrate into cell membranes efficiently, and head-to-head trials (Ulven 2011, Ramprasath 2013) show roughly equivalent or ~10-20% higher Omega-3 Index gain per gram of actives vs fish oil. The form advantage is genuine — but it does nothing to offset MegaRed's very low absolute dose per softgel, which the claim conveniently omits.
“Antarctic-sourced krill — pure, no fishy aftertaste.”
Antarctic krill is harvested at the lowest trophic level (eating phytoplankton), so mercury and PCB bioconcentration is near-zero — the lowest-contaminant marine omega-3 origin. The phospholipid form plus astaxanthin's oxidation resistance genuinely produce a clean, no-fishy-aftertaste profile. Both the source and the taste claims are accurate.
“Contains naturally occurring antioxidant astaxanthin.”
True. Krill oil naturally contains astaxanthin — the red carotenoid that gives MegaRed its colour and protects the oil from oxidation. The per-softgel amount is well below dedicated astaxanthin trial doses (4-12 mg/day), so it's an honest oil-stability feature and small antioxidant bonus, not a therapeutic astaxanthin dose. Claim is accurate as stated.
“PureTech is 3x more pure than regular krill oil.”
A defensible brand quality claim, not an independently audited one. PureTech is a real purification step that removes salts and impurities, contributing to the clean taste. But '3x more pure' is a manufacturer comparison against unspecified 'regular krill oil,' and MegaRed publishes no third-party IFOS/IKOS/TOTOX certification to substantiate it. Treat it as marketing-grade purity language, not a verified purity standard.
“Supports heart health; may reduce the risk of coronary heart disease.”
The cardiovascular benefit of EPA+DHA is real and backed by the broader omega-3 literature (Mozaffarian 2008; Harris 2008 Omega-3 Index). MegaRed even uses the qualified FDA 'supportive but not conclusive' language correctly. The honest caveat: at only ~90 mg EPA+DHA per softgel, a single once-daily MegaRed softgel is far below the doses those cardiovascular endpoints were measured at — you'd need several softgels a day to approach them.
MegaRed's headline number is 500 mg of krill oil, of which only about a fifth — roughly 90 mg — is the active combined EPA+DHA. That's the lowest per-softgel omega-3 dose of any krill oil on our best-krill-oil list, and a fraction of the 500-900 mg combined in a single concentrated fish-oil capsule. The phospholipid form is the right delivery vehicle, but it can't make up for how little is actually in the softgel. If you take MegaRed expecting a meaningful omega-3 dose from one daily softgel, you're getting a fraction of what the front of the bottle implies. Always read the 'Total Omega-3 Fatty Acids' line on the supplement-facts panel.
At ~$0.33 per softgel, MegaRed looks like the cheapest krill on the shelf. But cost-per-softgel is the wrong metric when softgels carry wildly different doses. Normalise to grams of actual EPA+DHA and MegaRed lands at roughly $3.50-4.00 per gram — among the most expensive on the krill list, because you're buying a lot of softgels to get a little omega-3. Sports Research krill (#1) delivers 196 mg per softgel at ~$0.40, and any concentrated fish oil is cheaper still per gram of actives. The lesson: a low sticker price on a low-dose product is not a bargain.
Where MegaRed indisputably wins is reach and recognition. It's the most-advertised krill brand in America and stocked in essentially every pharmacy, grocery, and big-box store — you can buy it tonight without ordering online, from a name you already trust. For a first-time or light-touch omega-3 buyer who values a recognisable product and a frictionless purchase over squeezing the most omega-3 from every dollar, that convenience is real value. Just be clear-eyed that you're paying a brand-and-availability premium, not getting the most actives.
MegaRed's shelf presence is also a trap: alongside this Extra Strength 500 mg pure-krill softgel (ASIN B0184SMS9A), Reckitt sells an 'Advanced 4-in-1' fish-oil-plus-krill blend, a 350 mg krill version, and a 750 mg 'Ultra Concentration.' They look near-identical and all carry the MegaRed name, so buyers routinely grab the wrong one. If you specifically want the pure Antarctic krill oil reviewed here, confirm the box reads 'Extra Strength 500 mg Krill Oil' — not '4-in-1' or 'Fish & Krill Oil.'
Krill are crustaceans, and krill oil — MegaRed included — contains residual crustacean proteins that can trigger reactions in shellfish-allergic people. PureTech purification reduces impurities but does not make the product allergy-safe. Absolute rule: if you have any documented shellfish allergy, do not buy MegaRed or any krill oil regardless of how 'pure' the processing claims to be. Algae-source omega-3 (Ovega-3 #10) is the safe alternative — same EPA+DHA actives, zero crustacean exposure.
MegaRed is what we recommend to a specific buyer: someone who wants a recognisable, trusted omega-3 they can pick up tonight at any pharmacy, in a single once-daily softgel with zero fishy aftertaste, and who isn't trying to chase a high Omega-3 Index. On those terms — brand trust, availability, tolerability, simplicity — MegaRed genuinely delivers, and it's the easiest krill oil to actually buy and stick with. The PureTech processing and phospholipid form make for a clean, easy softgel, and the Antarctic source is about as low-contaminant as marine omega-3 gets. The honest problem is dose-per-dollar. A 500 mg krill softgel carries only ~90 mg of combined EPA+DHA — the lowest active dose on our entire krill list — so the ~$0.33 sticker that looks cheap actually works out to roughly $3.50-4.00 per gram of omega-3 once you normalise for what you really get. That's a brand-and-availability premium, not a bargain. If cost-per-milligram of omega-3 is your priority, Sports Research krill (#1 on the krill list) gives you twice the actives per softgel, and a concentrated triglyceride-form fish oil delivers far more still per dollar. Pick MegaRed when trust and convenience are the deciding factors; default to a higher-dose krill or a fish-oil pick when they aren't. And if you have shellfish allergy, default to algae-source Ovega-3 (#10) — same actives, zero crustacean exposure.
The best-overall krill pick at ~$0.40/softgel — 196 mg EPA+DHA (twice MegaRed's dose) from MSC-certified Superba2 krill with full traceability. The dose-per-dollar answer if you want krill done right.
See it on the list →The clinically-studied premium krill at ~$0.40/serving — Friend of the Sea certified, PCB + heavy-metal tested, the branded oil behind much of the krill literature. Pick this for QC pedigree over brand familiarity.
See it on the list →The shellfish-allergy-safe alternative — algae-sourced EPA+DHA with zero crustacean exposure. The right pick if you have any shellfish allergy or want a vegan source.
See it on the list →Krill oil produced metabolic effects and plasma EPA+DHA increases comparable to fish oil despite delivering a lower absolute dose — direct evidence for the per-milligram phospholipid absorption edge, while underscoring how little EPA+DHA krill softgels like MegaRed actually contain.
Krill oil raised the Omega-3 Index more than an equivalent dose of fish oil over 4 weeks, supporting the phospholipid-delivery advantage — though the effect size is modest, not the dramatic superiority krill marketing implies.
Krill oil raised plasma EPA+DHA comparably to menhaden (fish) oil at a similar omega-3 dose, confirming bioequivalence of the phospholipid form — the basis for treating krill as a legitimate but dose-light and expensive omega-3 source.
Established the Omega-3 Index (RBC EPA+DHA %) as a cardiac-risk marker, with an Index above 8% tied to lowest CHD-event risk. At ~90 mg EPA+DHA per softgel, a once-daily MegaRed softgel is far below the intake needed to move this index meaningfully.
Comprehensive omega-3 cardiovascular review establishing meaningful triglyceride and event-risk effects at 1-4 g/day combined EPA+DHA — doses a single MegaRed softgel falls far short of, requiring several softgels daily to approach.
Review of krill composition documenting the phospholipid-bound EPA+DHA structure and naturally occurring astaxanthin that gives krill oil its oxidative stability — the mechanistic basis for MegaRed's clean, no-fishy-aftertaste profile.
