Spinach is a very popular green vegetable used in almost every cuisine in the world. It is extremely healthy and nutritious but if consumed in the wrong way it can also be dangerous for our health.
The vast amount of vitamins (A, B, C, E) and minerals and also iron, manganese, potassium, lutein and zeaxanthin make the spinach great defense mechanism against numerous diseases.
But it should be noted that in case of eating the cooked spinach the next day it should be never re-heated, because the heat turns the nitrites present in the spinach into nitrosamines that are very dangerous and carcinogenic.
The spinach is very beneficial for our health and in order to consume all of its vitamins and minerals its best to be eaten fresh, but even if you decide to eat the spinach the next day it can still be good and healthy if you consume it cold, just remember to never re-heat the spinach.
Source : http://www.healthyfoodteam.com/