A medium baked potato (150g, with skin) provides 110 calories, 620mg of potassium (18% DV), 27mg of vitamin C (30% DV), and 0g of fat, according to USDA FoodData Central. Potatoes are naturally gluten-free, cholesterol-free, and rank #1 on the Satiety Index as the most filling food per calorie (Holt et al., 1995). They deliver more potassium than a banana and more vitamin C per serving than many fruits. The healthiness of potatoes depends entirely on preparation: baked with skin is a superfood, deep-fried is not.
In this article (8 sections)▾
What are the nutrition facts of a potato?
The nutritional profile of a medium baked potato (150g, with skin) is remarkably dense for such a low-calorie food. Below is the complete breakdown based on USDA FoodData Central data. Potatoes are one of the few staple foods that provide significant amounts of vitamin C, potassium, and vitamin B6 in a single serving.
| Nutrient | Amount per Medium Potato | % Daily Value |
|---|---|---|
| Calories | 110 kcal | — |
| Carbohydrates | 26 g | 9% |
| Fiber | 4.7 g | 17% |
| Protein | 3 g | 6% |
| Fat | 0 g | 0% |
| Vitamin C | 27 mg | 30% |
| Potassium | 620 mg | 18% |
| Vitamin B6 | 0.54 mg | 25% |
| Iron | 1.1 mg | 6% |
| Magnesium | 30 mg | 7% |
| Phosphorus | 75 mg | 6% |
| Niacin | 1.4 mg | 9% |
| Folate | 28 mcg | 7% |
| Cholesterol | 0 mg | 0% |
| Sodium | 10 mg | <1% |
Source: USDA FoodData Central. Values for one medium potato (150g), baked with skin.
Are potatoes healthy or unhealthy?
Potatoes are one of the most nutrient-dense foods available. A single medium potato provides more potassium than a banana, 30% of daily vitamin C needs, 25% of vitamin B6, and 17% of daily fiber — all for just 110 calories (USDA FoodData Central). They are naturally fat-free, cholesterol-free, and gluten-free.
The confusion around potato health comes from preparation. A baked potato with skin is genuinely a health food. Deep-fried chips loaded with salt, butter-drenched mashed potatoes, and loaded potato skins are not — but the problem is the added fat, salt, and calories, not the potato itself. Countries with the highest potato consumption (like Peru at 85 kg/capita) do not have unusually high rates of obesity or heart disease.
How do potatoes compare to rice, bread, and pasta?
Per 100g of cooked weight, potatoes deliver significantly more micronutrients than white rice or white bread while containing fewer calories. The comparison table below uses USDA data for boiled potato (skin on), cooked white rice, and white bread.
| Nutrient | Potato (boiled) | White Rice | White Bread |
|---|---|---|---|
| Calories (per 100g) | 77 kcal | 130 kcal | 265 kcal |
| Potassium | 421 mg | 35 mg | 100 mg |
| Vitamin C | 19.7 mg | 0 mg | 0 mg |
| Fiber | 2.2 g | 0.4 g | 2.7 g |
| Protein | 2.0 g | 2.7 g | 9.0 g |
| Fat | 0.1 g | 0.3 g | 3.2 g |
| Glycemic Index | 56-85 | 73 | 75 |
Source: USDA FoodData Central. GI values from International Tables of Glycemic Index (Foster-Powell et al., 2002).
Potatoes also have a lower calorie density (0.77 kcal/g vs 1.30 for rice and 2.65 for bread), meaning you eat a larger, more satisfying portion for the same calories. The glycemic index varies widely by variety and preparation: boiled waxy potatoes score 56–69 (moderate), while baked Russets reach 85+ (high). Cooling cooked potatoes creates resistant starch, lowering the effective GI by 20–40% and feeding beneficial gut bacteria.
Can diabetics eat potatoes?
Yes, with smart preparation. Boiling potatoes (rather than baking or frying) produces the lowest glycemic response. Eating potatoes with protein, healthy fat, and additional fiber slows glucose absorption significantly. Cooling cooked potatoes overnight creates resistant starch that reduces the glycemic response by 20–40% (Englyst et al., European Journal of Clinical Nutrition). See our detailed guide on potatoes and diabetes.
Waxy potato varieties (like Red Pontiac or fingerlings) generally have a lower GI than starchy varieties like Russet Burbank. The American Diabetes Association does not prohibit potatoes — it recommends portion control and pairing with non-starchy vegetables and protein.
Are potatoes good for weight loss?
Surprisingly, yes. Potatoes rank #1 on the Satiety Index — a landmark 1995 study by Holt et al. (European Journal of Clinical Nutrition) found that boiled potatoes were the most satisfying food tested, scoring 323% compared to white bread at 100%. This means potatoes keep you feeling full longer per calorie than any other common food tested, including brown rice, whole wheat bread, and oatmeal.
The mechanism is straightforward: potatoes have high water content (~80%), significant fiber (4.7g per medium), and low calorie density (0.77 kcal/g). A 200-calorie portion of boiled potato is a large, filling plate; a 200-calorie portion of chips is a small handful. The preparation method is everything: baked or boiled potatoes support weight management; fried potatoes in large quantities do not.
How does cooking method affect potato nutrition?
Boiling with skin: Preserves most nutrients. Some vitamin C leaches into water (use the cooking water in soups). Produces the lowest glycemic response. Best method for health-conscious eating.
Baking: Concentrates nutrients slightly as moisture evaporates. Higher GI than boiling (85+ vs 56–69) because starches gelatinize more completely. Eating the skin adds fiber, iron, and potassium.
Frying: Adds significant calories from oil (a medium baked potato is 110 cal; the same potato fried is 300–500 cal). Frying above 120°C produces acrylamide, a potentially harmful compound. French fries and chips are the least healthy preparation.
Cooling after cooking: Creates resistant starch (RS3) as the starch molecules retrograde on cooling. This lowers the effective GI by 20–40%, reduces caloric availability, and functions as a prebiotic that feeds beneficial gut bacteria. Potato salad is nutritionally superior to hot baked potato for glycemic control.
Are green potatoes dangerous?
The green color comes from chlorophyll, which is harmless. However, the same light exposure that causes greening also triggers solanine production, a glycoalkaloid that can cause nausea, digestive pain, and headaches at concentrations above 200mg/kg of body weight (FAO). Normal consumption of slightly green potatoes is unlikely to cause problems, but visibly green potatoes should have the green portions cut away before cooking. To prevent greening, store potatoes in a cool, dark place. See our storage guide for best practices.
Frequently Asked Questions
Are potatoes good for a cardiac diet?+
Yes. Potatoes are naturally fat-free and cholesterol-free, with 620mg of potassium per medium potato (18% DV) which helps regulate blood pressure (USDA FoodData Central). The key is preparation: baked or boiled potatoes are heart-healthy, while deep-fried versions add harmful fats.
How many calories are in a baked potato with skin?+
A medium baked potato with skin (150g) contains approximately 110 calories, 26g of carbohydrates, 3g of protein, and 0g of fat (USDA FoodData Central).
Are potatoes healthier than rice?+
Per 100 calories, potatoes provide significantly more potassium, vitamin C, and fiber than white rice. Potatoes also have a lower calorie density (0.77 kcal/g vs 1.30 for rice), making them more filling per calorie.
Do potatoes cause weight gain?+
Potatoes themselves do not cause weight gain. They rank #1 on the Satiety Index (Holt et al., 1995), meaning they are the most filling food per calorie. Weight gain is driven by preparation method (frying, adding butter/cheese) and overall calorie intake, not the potato itself.
What is the healthiest way to cook potatoes?+
Boiling or steaming with the skin on preserves the most nutrients and keeps the glycemic index lowest. Cooling cooked potatoes before eating creates resistant starch, which lowers the GI further and feeds beneficial gut bacteria. Baking with skin is also nutritious.
How often can a diabetic have potatoes?+
Diabetics can include potatoes regularly if prepared correctly: boiled (not baked or fried), cooled to form resistant starch, eaten with protein and fiber to slow glucose absorption. Waxy varieties like Red Pontiac have a lower glycemic impact than starchy Russets.