Dietitians say canned sardines, mackerel and anchovies are among the healthiest foods

Nutrition experts are recommending canned oily fish — sardines, mackerel and anchovies — as a near-complete food, rich in omega-3 fatty acids, vitamin B12 and vitamin D. Dietitian Colin Robertson says they help prevent heart disease, reduce diabetes risk and lower blood pressure. The global canned fish market was worth around $9.5 billion in 2022 and is projected to reach $17.2 billion by 2033.