It’s best not to boil cauliflower in water that is too hot.

We love cauliflower. The white cabbage vegetable goes well with many different dishes, so we regularly prepare it in the kitchen. But we’re going to stop boiling our cauliflower—it’s not good for your health.
Cauliflower health benefits
Let’s start off on a positive note: cauliflower has important health benefits. Studies have shown that it can contribute to reduced risk of diseases such as bladder, breast, prostate, ovarian and colon cancer—this is due in part to the sulforane content within cauliflower cells which acts as an anti-cancer agent.