So-called "high strength" claims on omega-3 supplements could be leaving shoppers paying a premium for products that contain "surprisingly low" levels of active ingredients compared to cheaper versions, according to a consumer group. nutrition experts assessed 24 omega-3 supplements against the Scientific Advisory Committee on Nutrition (SACN) guidance that people consume an average of 450mg of EPA and DHA per day. The watchdog used 1,000mg of EPA and DHA as the benchmark for what an omega-3 product marketed as "high strength" should contain, based on studies showing health benefits for certain groups at these levels. found Superdrug, Morrisons and Sainsbury's Omega 3 Fish Oil 1000mg supplements each contained 250mg of EPA and DHA combined despite their "high strength" labels. Similarly, Holland & Barrett's High Strength Omega 3 Fish Oil 1500mg contained just 375mg, well below the 450mg daily advised dose.