6. Sardines ( 1,463 mg per serving)
Sardines are very small oily fish commonly eaten as appetizers, snacks, or delicacies.
They’re highly nutritious, especially when eaten whole. They contain almost every nutrient your body needs.
A 3.5-oz (100-g) serving of drained sardines provides more than 370% of the DV for vitamin B12, 24% for vitamin D, and 96% for selenium.
Omega-3 content: 1,463 mg of EPA and DHA (combined) per cup (149 g) of canned Atlantic sardines, or 982 mg per 3.5 oz (100 g)