📊 Full nutrition facts — per 100g
| Nutrient | Amount | % Daily value | Level |
|---|---|---|---|
| Calories | 77 kcal | 4% | |
| Carbohydrates | 17.5g | 6% | |
| Dietary fibre | 2.2g | 8% | |
| Protein | 2.0g | 4% | |
| Vitamin C | 19.7mg | 22% | |
| Potassium | 425mg | 9% | |
| Vitamin B6 | 0.3mg | 18% | |
| Magnesium | 23mg | 5% | |
| Resistant starch | varies | — | |
| Iron | 0.8mg | 4% |
Based on Australian NRV. Source: FSANZ Australian Food Composition Database.
📈 Glycaemic index (GI)
💊 Key vitamins & minerals
✅ Health benefits
Potatoes are an excellent source of potassium (425mg/100g) — more than bananas — supporting healthy blood pressure and reducing cardiovascular disease risk.
Cooled cooked potatoes contain significant resistant starch, which acts as a powerful prebiotic — feeding beneficial gut bacteria and producing short-chain fatty acids that reduce colon cancer risk.
Potatoes are one of the best plant sources of vitamin B6, essential for neurotransmitter synthesis, immune function and homocysteine metabolism.
On the Satiety Index, boiled potatoes rank as the most filling food per calorie of any food tested — significantly more satiating than bread, pasta or rice.
⚠️ Who should limit or avoid this food
Raw potato GI is low (~30). Baked/mashed potato GI is very high (~80–111). Diabetics should choose boiled, cooled potatoes for lowest glycaemic impact.
Green patches and sprouts contain solanine — a toxic alkaloid. Always cut away all green flesh and any sprouts before eating. Never eat potato skin that has turned green.
Potatoes belong to the nightshade family. People with nightshade sensitivity (some autoimmune conditions) may choose to limit potato intake.
Boiled potatoes are nutritious and filling. Deep-fried chips quadruple the calories and add inflammatory oils. The potato itself is healthy — what it's cooked in matters enormously.
🔬 Possible side effects or risks
Baked, mashed or fried potatoes have very high GI values. People with diabetes or insulin resistance should choose boiled cooled potatoes.
Green flesh and sprouts contain solanine, which causes nausea, vomiting and headaches. Never eat green potatoes.
The fibre and resistant starch in potatoes can cause gas and bloating in people unaccustomed to high-fibre starchy foods.
🛒 How to select fresh potato
Any green colouration means solanine has developed from light exposure. Small green spots can be cut away generously. Extensively green potatoes should be discarded.
Fresh potatoes should feel very firm and solid with no soft spots. Soft, spongy texture indicates moisture loss and age.
Small sprouting eyes are fine if removed before cooking. Heavily sprouted potatoes with long sprouts or soft flesh should be discarded — solanine content is higher.
🧊 Storage tips & shelf life
Never in the refrigerator — cold converts starch to sugars, affecting flavour. Store in paper bag, not plastic.
Cold temperatures cause starch to convert to sugar and develop an unpleasant sweet flavour. Refrigerate only if cooked.
Raw potatoes don't freeze well (become watery). Blanched chips, roasted pieces or mashed can be frozen successfully.
📖 About potato — complete guide
Few vegetables have suffered such an undeserved reputation as the potato. Often lumped in with chips and fast food, plain boiled potatoes are actually one of the most nutritious, filling and affordable foods available — higher in potassium than bananas, a good source of vitamin C and B6, and ranking number one on the University of Sydney's Satiety Index for filling power per calorie.
The discovery that cooling cooked potatoes dramatically increases their resistant starch content has significantly rehabilitated potatoes in nutritional science. A 2015 analysis found that refrigerating cooked potatoes overnight increased resistant starch content by 280% — turning them into a powerful prebiotic that feeds beneficial gut bacteria, reduces post-meal blood sugar response, and produces short-chain fatty acids associated with colon cancer prevention. Cold potato salad with olive oil and vinegar is genuinely one of the most nutritionally optimal ways to eat potatoes.