Quinoa Leads the Grains on Potassium. It Still Loses.

Quinoa is the best grain for potassium we hold, at 143.3mg per 100 calories — and it still sits 100.7mg below the median of the other 177 foods, which is 244mg. The whole grain category spans 101.8mg from quinoa down to parboiled brown rice at 41.5mg. The gap from the best grain to ordinary food is bigger than the gap between the best grain and the worst one.

That is the thing worth knowing about grains and potassium. Choosing carefully inside the category buys you less than stepping outside it.

All ten grains, ranked

Cooked quinoa leads at 143.3mg of potassium per 100 calories, cooked wild rice is second at 100mg, and UNCLE BEN'S parboiled brown rice is last at 41.5mg. Nine of the ten are cooked rows; dry enriched pasta is the exception and is marked as such.

All ten sit below the median food

123 of the 187 foods we hold with a potassium value beat quinoa, the best grain. Every one of the ten grains falls below the 244mg median of everything that is not a grain. This is not a close call at the category level.

Raw spinach carries 2,426.1mg of potassium per 100 calories — 16.9 times quinoa. Raw potato is 551.9mg, banana 402.2mg. Against those, the difference between quinoa and couscous is rounding.

What 1,000mg of potassium costs

1,000mg of potassium takes 698 calories of cooked quinoa, 249 calories of banana, 181 of raw potato and 41 of raw spinach. By weight the picture is closer — 581g of cooked quinoa against 179g of spinach — because cooked quinoa is mostly water, and it is the calories, not the bulk, that separate them.

There is no useful potassium strategy that runs through your grain choice. Swapping white rice for quinoa moves you 97.8mg per 100 calories. Putting a handful of spinach next to either moves you far more, for almost no calories at all.

Two rows that are not the grain you pictured

Our brown rice row is UNCLE BEN'S parboiled brown rice and our white rice row is parboiled, enriched, long-grain — both parboiled, neither a plain pot of rice. Parboiling drives some minerals into the grain before milling, so if anything these rows flatter rice rather than penalise it, and they are still the bottom two.

The pasta row is dry, not cooked. At 371 calories per 100g it looks dense in the per-100g column at 223mg, and mid-table per calorie at 60.1mg. Pasta takes on a lot of water as it boils, so its per-100g figure is not a plate of pasta. No cooked pasta row exists in our data and we will not fabricate one; the per-calorie column survives the problem anyway, which is the argument for reading that column.

So is quinoa worth it?

For potassium, the honest answer is that quinoa is the best of a group that is not in this race. It gives 3.1 times the potassium per calorie of parboiled white rice, which is a real difference inside the category and a small one against a leaf of spinach.

Grains earn their place on a plate for other reasons — energy, fiber, cost, what they taste like under a sauce. Potassium is simply not one of the axes on which they compete, and a post that ranked them without saying so would be technically true and quietly misleading.

Pick two and compare them properly

The underlying numbers live on our pages for quinoa, bulgur and spinach. Head to head, quinoa vs white rice covers the swap most people are actually weighing, and the full potassium-per-calorie ranking shows what the top of the list looks like.

Cooked grains are where portions go wrong

Dry and cooked are different foods, and almost every grain figure people quote at each other quietly mixes the two up. The same cup of rice is two very different entries depending on which side of the pan it was measured on.

Sunn keeps that straight without making you think about it. Say "bowl of quinoa with roast veg" and a sensible cooked portion lands in your log within seconds, minerals attached. Questions come back only where a vague answer would have skewed your totals.