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Why do potatoes turn green in light?

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Potatoes will often go green when they're not stored properly and they're exposed to light. This is due to formation of chlorophyll (which is found in all green plants), however the green colour is a useful indicator that levels of certain toxins that are harmful to humans, known as glycoalkaloids, may be increased.


Can you eat potatoes with a green tinge?

Green potatoes should be taken seriously. Although the green color itself is not harmful, it may indicate the presence of a toxin called solanine. Peeling green potatoes can help reduce solanine levels, but once a potato has turned green, it's best to throw it away.

Why do potatoes go green in sunlight?

Potato tubers turn green when they are exposed to sunlight during growth or storage. The green comes from the pigment chlorophyll. Potato tubers exposed to light will become green naturally as the plant seeks to harvest the light. Potato varieties can differ in their sensitivity to light.

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