Plenty of fish in the sea When it comes to fish, potassium levels fall all over the line. 3-oz servings can contain as much as 480 mg of potassium. On the low end, the same amount of canned tuna has only 200 mg.Click to see full answer. Similarly, you may ask, what meats are high in potassium?In addition to seafood, red meat (including lean beef), chicken, and turkey also provide potassium.Similarly, what kind of meat is low in potassium? These foods are low in potassium. Do not eat more than two servings of beef, pork, chicken, turkey, fish or other meats each day. One serving is equal to 75 grams or 2 ½ ounces. Avoid nuts and seeds and their butters such as peanuts, cashews, pistachios, hazelnuts, almonds, walnuts, sunflower, hemp and pumpkin seeds. Furthermore, how much phosphorus is in canned tuna? Top Low-Phosphorus Food Choices for a Kidney Diet Seafood Phosphorus Content Yellowfin tuna 210 mg Sea bass 210 mg Tuna, canned 130 mg Rockfish 195 mg Is canned tuna high in magnesium?Tuna: Tuna fish, if had fresh, has a great percentage of magnesium. Avoid canned tuna as it contains a lot of salt. Tuna can be baked, steamed or added to salads and should be eaten fresh to derive maximum benefits. In addition to being rich in magnesium, it is also packed with Vitamin D and super healthy omega-3 fats.