Turn green
Begin sprouting heavily
Taste unusually bitter
Have been improperly stored for long periods
Green potatoes should generally be discarded because elevated solanine levels can cause digestive symptoms if consumed in significant amounts.
Normal potatoes prepared correctly are considered safe for most people.
Raw Kidney Beans
Another food sometimes mentioned in viral posts is raw kidney beans.
Raw or undercooked kidney beans contain phytohaemagglutinin, a natural lectin.
Fortunately, proper cooking destroys this compound.
Cooking beans thoroughly makes them safe and highly nutritious.
This illustrates an important point:
Preparation matters.
Many foods become perfectly safe after normal cooking.
Spinach and Oxalates
Spinach is another vegetable frequently criticized online.
It contains oxalates, naturally occurring compounds that can contribute to kidney stone formation in susceptible individuals.
Does this mean everyone should avoid spinach?
No.