Q. Are green bits on potatoes bad for you?

Feb 24 2009 Ask Sam

A. It’s best to avoid eating any green bits on potatoes. This is because they can contain high levels of natural toxins called glycoalkaloids.

Glycoalkaloids are usually found in potatoes at low levels. But they can be higher in:

* green parts

* damaged parts

* sprouted parts

High levels of glycoalkaloids can upset the digestive system and cause symptoms such as abdominal pain, vomiting and diarrhoea. But glycoalkaloid poisoning is extremely rare, even though potatoes are eaten in very large amounts in many countries.

To avoid high levels of glycoalkaloids being produced in potatoes, store them in a dark, cool and dry place. And remember not to eat any damaged, green or sprouted parts. If potatoes still taste bitter after you’ve removed these bits, it’s better not to eat them, because they could contain high levels of glycoalkaloids.