Can you just warm kidney beans up?

Kidney beans contain a compound called phytohaemagglutinin, which is a protein that can cause gastrointestinal problems such as nausea, vomiting and diarrhoea if consumed raw or undercooked. To ensure the safety and digestibility of kidney beans, it is recommended to follow proper cooking methods.

So, the answer is no, you can't just warm kidney beans up. You need to cook them thoroughly to destroy the phytohaemagglutinin and make them safe for consumption. To do this, you should soak the beans overnight, then boil them in fresh water for at least 10 minutes.