The claimEvidence A · guideline-tier
Fish oil 1000 mg = 1 g EPA+DHA
The evidence
1000 mg is total fish oil weight; EPA+DHA is usually 300-500 mg. Read the actives, not the headline.
Why the claim spreads
Labels print the big '1000 mg fish oil' number, not the much smaller EPA+DHA actually inside — the headline number is what sells.