When you cook potatoes and then let them cool, something surprising happens: they actually become healthier. During the cooling process, some of the starch turns into resistant starch – a special type of fiber that isn’t digested in the small intestine. Instead, it travels to the colon, where it feeds your beneficial gut bacteria and supports a healthy microbiome.

Even better: cooled potatoes cause a lower spike in blood sugar compared to freshly cooked ones. That makes them a smart choice for anyone looking to support digestion, balance blood sugar, or simply get more out of their carbs.

How long do cooked potatoes last?

• Unpeeled: 2–3 days in the fridge
• Peeled or cut: 1–2 days in the fridge

To store them safely, let potatoes cool quickly, keep them covered, and refrigerate at below 7°C (45°F). When reheating, make sure to heat thoroughly (above 70°C / 160°F) to kill any potential bacteria.

Bottom line:

Cold potatoes are not just leftovers. They are a gut-friendly, blood sugar-friendly superfood. Perfect for potato salad or a second helping with benefits.