01Fish Oil vs Krill Oil vs Algae Oil
| Source | EPA/DHA | Typical Cost | Best For |
|---|---|---|---|
| Fish oil | High per dollar | $ | Most people; best value for EPA+DHA |
| Krill oil | Lower per capsule, bound to phospholipids | $$$ | Those who want smaller capsules; marketed as better absorbed |
| Algae oil | DHA-focused, usually little EPA | $$ | Vegetarians, vegans, and anyone avoiding fish |
02EPA and DHA: The Numbers That Matter
The two omega-3s with the most research behind them are EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). Here's the label trap: a capsule marked "1,000 mg fish oil" may contain only 300 mg of combined EPA+DHA — the rest is other fats. Always check the supplement facts panel for the EPA and DHA line, not the front-of-bottle number. Most general-health guidance clusters around 250–500 mg of combined EPA+DHA per day; higher amounts are used under professional guidance.
03Triglyceride vs Ethyl Ester Form
Fish oil comes in two main processed forms. Triglyceride (TG) form is closest to how the oil occurs naturally in fish and is generally considered better absorbed. Ethyl ester (EE) form is cheaper to concentrate to high potencies. Some evidence suggests TG form absorbs somewhat better, though EE still works. If a label doesn't say, "natural triglyceride" or "TG" is the marker to look for — and it's one reason quality fish oils cost a bit more.
04What About Mercury and Freshness?
Reputable brands test for heavy metals (mercury, lead, PCBs) and many carry third-party certifications such as IFOS (International Fish Oil Standards). Smaller fish (anchovies, sardines) used by better brands accumulate fewer contaminants than large species. Rancidity is the other concern: a strong fishy smell or repeating "fish burps" can signal oxidation. Store capsules cool and dark, and don't stockpile more than you'll use in a few months.
05Do You Need Omega-3s If You Eat Fish?
Fatty fish — salmon, sardines, mackerel — is the best source, and dietary guidelines generally suggest two servings a week. If you eat that much fatty fish regularly, a supplement adds less. If you rarely eat fish, eat only white fish, or follow a vegetarian or vegan diet, algae oil (for DHA) or fish/krill oil is the practical way to cover the gap.
Frequently Asked Questions
Is krill oil better than fish oil?
Krill oil's omega-3s are bound to phospholipids, and marketers claim better absorption — but krill capsules typically contain far less EPA+DHA per capsule and cost much more. For most people, a quality fish oil delivers more omega-3s per dollar. Krill's real advantage is smaller, easier-to-swallow capsules.
How much EPA and DHA should I look for?
Ignore the front-of-bottle "1,000 mg" and read the supplement facts: look for the combined EPA+DHA milligrams. Around 250–500 mg combined per day covers general use for most adults; therapeutic amounts are higher and worth discussing with a provider.
What's the best omega-3 for vegetarians?
Algae oil — it's where fish get their omega-3s in the first place. It's DHA-dominant with little EPA, which is fine for most purposes. It's the only meaningful plant-based source of preformed DHA (flaxseed's ALA converts poorly).
Why do some fish oils cause fishy burps?
Often a sign of oxidation (rancidity) or just rapid capsule breakdown. Enteric-coated capsules, taking them with meals, freezing capsules, or switching to a fresher triglyceride-form product usually fixes it. Persistent strong fish odor is a reason to replace the bottle.
Where can I buy omega-3s in Richmond, CA?
William's Natural Foods at 12249 San Pablo Ave, Richmond, CA 94805 carries fish oil, krill oil, and algae-based omega-3s in a range of potencies. Open Monday–Friday 9 AM–7 PM, Saturday 9 AM–6 PM, Sunday 10 AM–5 PM. Call (510) 232-1911 and staff can walk you through the labels.
Still Have Questions? Come Talk to Us In Store
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This article is for informational purposes only and is not medical advice. Omega-3s can slow blood clotting — talk to your healthcare provider before high doses, especially if you take blood thinners or are scheduled for surgery. These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease.