5) Spinach
Spinach contains a high percentage of nitrate which is transformed into nitrite at high temperatures, and it can be very harmful to health. In order to avoid serious consequences on your organism, it is therefore advisable to always consume it as soon as it is cooked, in a pan, or according to other recipes, such as quiches.
![](https://www.goodnewshare.com/wp-content/uploads/2022/12/5-7-1024x576.jpg)