A consumer investigation reports that some “high strength” omega-3 supplements contain amounts that fall below what shoppers might assume from product labelling. According to coverage from multiple outlets, Which? nutrition experts assessed 24 omega-3 supplements and compared their contents against guidance from the UK Scientific Advisory Committee on Nutrition (SACN). The findings indicate that a number of products do not meet the recommended omega-3 levels, despite being marketed as high strength. The investigation highlights a gap between marketing claims and the actual quantity of omega-3s contained in certain supplements. The reports describe the assessment as a comparison of supplement composition with SACN guidance, rather than a study of health outcomes. None of the summaries provided specify the exact number of under-dosed products, the percentage shortfalls, or which specific brands were involved. The articles focus on supplement content accuracy and compliance with nutrition guidance, raising questions about how consumers interpret “high strength” labelling.