<Li> Salmon, pink, cooked, dry heat, 100 grams (3.5 oz): 522 IU (5.2 IU / g) </Li> <Li> Mackerel, Pacific and jack, mixed species, cooked, dry heat, 100 grams (3.5 oz): 457 IU (4.6 IU / g) </Li> <Li> Tuna, canned in oil, 100 grams (3.5 oz): 269 IU (2.7 IU / g) </Li> <Li> Sardines, canned in oil, drained, 100 grams (3.5 oz): 193 IU (1.9 IU / g) </Li>

The skin activates vitamin d that is important for healthy bones