Foods that should not be refrigerated and how poor storage can affect their quality.

Potatoes
Cold storage causes the starch in potatoes to convert into sugar. While this might not sound serious, it becomes a problem when potatoes are cooked at high temperatures. The increased sugar can turn into compounds that are not beneficial for the body. Refrigerated potatoes may also trigger sharper blood sugar spikes, especially in people sensitive to glucose changes. The cold encourages sprouting and green discoloration, both signs of naturally occurring toxins.

Best storage method
Keep potatoes in a dark, dry, well ventilated space such as a pantry or cupboard, far from sunlight.

Onions
Onions absorb moisture easily, and the refrigerator is a humid environment. This causes them to soften, spoil faster, and become a breeding ground for microscopic organisms. Cold temperatures also reduce some of the antioxidants that help protect cells and manage inflammation.

Best storage method
Store onions in a dry, airy spot using a basket or paper bag that allows air to circulate.