I'm not too sure about that.

Here's my list of super foods because they contain high amounts of calcium, magnesium, or potassium. And they're all great low-carb choices.

Raw Kale, 1 cup chopped
Calcium 90.450 mg
Magnesium 22.780 mg
Potassium 299.490 mg

Raw broccoli, 1 cup chopped
Calcium 42.240 mg
Magnesium 22.000 mg
Potassium 286.000 mg

1 cup cooked Chinese Broccoli
Calcium 88.000 mg
Magnesium 15.840 mg
Potassium 229.680 mg

1/2 cup regular tofu
Calcium 434.000 mg
Magnesium 37.200 mg
Potassium 150.040 mg

1 cup plain, whole milk yogurt
Calcium 295.715 mg
Magnesium 28.371 mg
Potassium 378.770 mg

1 can sockeye salmon
Calcium 881.910 mg
Magnesium 107.010 mg
Potassium 1391.130 mg

1 can waterpacked white tuna
Calcium 24.080 mg
Magnesium 56.760 mg
Potassium 407.640 mg

1 cup raw spinach
Calcium 29.700 mg
Magnesium 23.700 mg
Potassium 167.400 mg

1 California (Haas) avocado
Calcium 19.030 mg
Magnesium 70.930 mg
Potassium 1096.820 mg

1 oz whole roasted pumpkin seeds
Calcium 12.191 mg
Magnesium 151.389 mg
Potassium 228.501 mg

1 oz. whole roasted sunflower seeds
Calcium 19.845 mg
Magnesium 36.572 mg
Potassium 240.975 mg

1 raw, Eastern oyster
Calcium 4.000 mg
Magnesium 11.000 mg
Potassium 84.000 mg

1 oz Brazil nuts
Calcium 49.896 mg
Magnesium 63.788 mg
Potassium 170.100 mg

1 oz almonds
Calcium 82.499 mg
Magnesium 77.679 mg
Potassium 198.167 mg

Flax seeds, 1 Tbsp.
Calcium 23.880 mg
Magnesium 43.440 mg
Potassium 81.720 mg

Karen