Magnesium-rich foods, ranked by mg per serving

Pumpkin seeds (156 mg/oz), spinach (157 mg/cup cooked), and black beans (120 mg/cup) lead on magnesium. The mg-per-serving and cost ranking, plus when food is not enough.

1. 01

   Pumpkin seeds (pepitas): 156 mg per 1 oz

   The single densest convenient source: 156 mg of magnesium per 28 g ounce, ~37% of a man's RDA, per USDA FoodData Central. Also ~8.5 g protein and ~5 g fiber per ounce. A handful on yogurt or in a trail mix is the highest magnesium-per-effort move on this list. Buy raw bulk to keep cost near ~$0.01 per 10 mg magnesium.

2. 02

   Cooked spinach: 157 mg per 1 cup

   One cup of boiled spinach delivers 157 mg (~37% RDA) because cooking collapses ~10 cups of raw leaves into one dense cup (USDA). Raw spinach is far less practical at ~24 mg per cup. The oxalate in spinach modestly lowers absorption, but the sheer concentration still makes cooked greens a top source. Swiss chard (150 mg/cup cooked) is essentially interchangeable.

3. 03

   Black beans: 120 mg per 1 cup cooked

   120 mg per cup (~29% RDA), plus 15 g protein and 15 g fiber (USDA). Among the best cost-per-mg sources on the list when bought dry in bulk (see our bulk-buying math). Most cooked legumes cluster here: cooked edamame ~100 mg/cup, kidney beans ~75 mg/cup, lentils ~71 mg/cup.

4. 04

   Almonds: 80 mg per 1 oz

   80 mg per 28 g (~19% RDA), with 6 g protein (USDA). Cashews are close at ~74 mg/oz. Nuts are calorie-dense (~160 kcal/oz), so they are an add-on source, not something to eat by the cup. A 1 oz portion in the afternoon is a clean ~19% of the target.

5. 05

   Dark chocolate (70-85% cacao): 65 mg per 1 oz

   ~65 mg per 28 g of 70-85% dark chocolate (USDA), the rare source most people will not skip. Magnesium content tracks cacao percentage, so 85% beats 70%. At ~160 kcal/oz it is a treat-shaped source; useful for hitting the last 15% of the daily target, not the base.

6. 06

   Cooked quinoa: 118 mg per 1 cup

   118 mg per cooked cup (~28% RDA), plus 8 g protein and a complete amino-acid profile (USDA). The best whole-grain carb base on magnesium, ahead of brown rice (~86 mg/cup) and whole-wheat pasta (~42 mg/cup). Building meals on quinoa instead of white rice quietly raises daily magnesium by ~100 mg.

7. 07

   Avocado: 58 mg per medium fruit

   58 mg per medium avocado (~14% RDA), with 13 g fiber and potassium (USDA). A convenient source that pairs with the eggs and greens most people already eat. Not a base source on its own, but it stacks well with the seeds and beans above to clear the target without supplements.

8. 08

   Why food beats a magnesium pill (until it doesn't)

   Food magnesium arrives with fiber, potassium, and protein, and does not trigger the osmotic diarrhea that high-dose magnesium oxide causes. The catch: refining strips it, so white bread, white rice, and processed foods are near-zero, which is how ~48% of Americans fall short (NHANES, Moshfegh 2009). If you eat seeds, cooked greens, legumes, and whole grains daily you likely clear the RDA from food. Supplement only the gap, and when you do, choose glycinate or citrate over oxide for absorption.