Start with the active amounts
A label may show both total fish oil and the amounts of EPA and DHA in one serving. Those numbers answer different questions. On BasisTrace, the comparable amount is EPA plus DHA per labeled serving. We do not treat total fish oil as the amount of EPA and DHA.
Check how many softgels make up one serving before comparing two products. If a label does not disclose EPA or DHA, we show that value as unavailable rather than guessing.
Put the price on one scale
First divide the quoted package price by the number of servings in that package. Then calculate:
For an illustrative calculation only, a $30 package with 60 servings costs $0.50 per serving. If each serving declares 600 mg of EPA plus DHA, the calculated cost is about $0.83 per 1,000 mg. This is not an offer for a real product.
Know what that number cannot say
A lower unit cost does not establish product quality, freshness, safety or clinical effectiveness. Prices also change; an outdated or missing offer cannot support a current unit-cost comparison. Check the source label and the price-check date on each product record.
For the site's full calculation and evidence policy, read our method.