Potato

Starchy tuber

What's inside potato, and where does it go in your body?

A staple starch that's also one of the biggest potassium sources in many diets, especially with the skin.

Inside 100 g baked, with skin

About 93 kcal, 21 g carbohydrate, 2.2 g fiber and 535 mg potassium (USDA).

Preparation

Frying adds fat and calories; cooling cooked potatoes increases resistant starch.

Evidence & sources

• Potatoes baked with their skin are among the top food sources of potassium. Evidence: established. Known: Listed in the NIH food-source table. Unknown: Boiling leaches some potassium into the water. Source: NIH Office of Dietary Supplements, Potassium Fact Sheet for Health Professionals (Current revision).

Connected topics

• Potassium
• Carbohydrate
• Vitamin C
• Vitamin B6
• Fiber

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General education only, not medical advice. Drafted Oct 2026 · pending qualified expert review.