# Omega-3 vs Fish oil

Source page: https://www.vitamindbc.com/compare/omega-3-vs-fish-oil · prices checked 2026-11-14

## Verdict

Fish oil is one source of omega-3, so the two overlap rather than compete. “Omega-3” on a label means EPA and DHA (from fish, krill or algae) or ALA (from plants); fish oil is the most common and cheapest source of EPA and DHA. Compare EPA + DHA per serving, not the word on the front. Vegans need algal oil.

## Absorption

EPA and DHA are absorbed best with a meal that contains fat. Concentrated ethyl-ester fish oils absorb less well on an empty stomach than natural triglyceride forms. ALA from flax is converted to EPA and DHA only in small amounts.

## Best for

- **Omega-3**: Vegans (algal oil) and anyone comparing all sources.
- **Fish oil**: The cheapest EPA + DHA for most people.

## What each costs per dose

- **Omega-3**: cheapest $0.064 per serving, median $0.265 across 58 products (https://www.vitamindbc.com/best/omega-3)
- **Fish oil**: cheapest $0.064 per serving, median $0.254 across 40 products (https://www.vitamindbc.com/best/fish-oil)

## Side by side

| | Omega-3 | Fish oil |
|---|---|---|
| What it is | A family of fatty acids (EPA, DHA, ALA) | One source of EPA + DHA |
| Sources | Fish, krill, algae, flax | Oily fish |
| Vegan options | Yes (algal oil) | No |
| What to compare | EPA + DHA per serving | EPA + DHA per serving |

## FAQ

**Is omega-3 the same as fish oil?**

Not quite. Fish oil is a source of the omega-3s EPA and DHA; omega-3 supplements can also come from krill or algae, and plant ALA is a third omega-3 the body converts poorly. Not medical advice.

**Why do both columns list some of the same products?**

Because every fish oil is an omega-3 supplement. The omega-3 column also includes krill and algal oils, so its cheapest pick can be the same product as the fish-oil column.

Cite as "VitaminDB (vitamindbc.com)". Method: https://www.vitamindbc.com/methodology. Not medical advice.