Use a labeled food portion
Mushroom Council panels list 286 mg for 90 g of raw white mushrooms, 306 mg for an 84 g portabella and 378 mg for 90 g of oyster mushrooms. These values show a useful contribution, not that all mushrooms have the same potassium content. [1]
Different weights change the comparison
The same panels list 231 mg for 76 g of shiitake and 143 mg for 70 g of maitake. Those portions differ, so the numbers should not be presented as a precise same-weight ranking. Drying, cooking and the amount served can change the comparison again. [1]
Fit the portion to the person’s plan
Imagine adding a mushroom side dish while following a potassium restriction for kidney disease. Count the actual variety and serving in the plan rather than treating every vegetable-like food as unrestricted. Potassium needs and restrictions depend on kidney function, medicines and clinical circumstances. [2]
| Situation | Interpretation |
|---|---|
| Raw white, 90 g | 286 mg in the cited panel |
| Raw oyster, 90 g | 378 mg in the cited panel |
| Kidney-related restriction | Use your individualized plan |
Sources for this article
- Mushroom Council: registered dietitian handbook nutrition panels
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product. - Potassium - Health Professional Fact Sheet
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.