Top 5 dangerous things you can eat

Eating fully ripe elderberries is perfectly safe, but it's important to remember that unripe fruits, seeds, leaves and stems of the plant may contain chemicals that metabolize into cyanide in your body. It's recommended to consume these berries cooked: in jams, syrups or compotes.

Everyone knows it's dangerous to eat unknown mushrooms, but even if you know how "good" mushrooms look, it's better to always rely on the experience of a trained forager or experienced mycologist. The thing is that many poisonous mushrooms very closely resemble edible ones, and cause more than 80% of fungus-related deaths worldwide.

The cashews you can find at the grocery store are the steamed ones. Raw cashew nuts contain a very dangerous chemical, urushiol, which can cause a lot of pain and be fatal if consumed in large amounts. To people with certain allergies, eating even one nut can be deadly.

Try to answer this trivia question about the cashew tree.

The mercury levels in the world oceans are rising today, so tuna absorb significant amounts of this metal into their flesh. Eating a lot of tuna can result in mercury toxicity, which leads to problems with hearing, walking and coordination. Anyway, consuming tuna also provides a lot of benefits, so we just should eat it in moderation – learn more in this article.

Cassava is a tropical root crop commonly used in puddings (tapioca is extracted from it) and many other desserts, but it must always be properly cooked. Raw cassava contains cyanide, and to properly process some types of this dangerous plant the roots have to be peeled, dried, soaked and cooked.

Sweet cassava, the least dangerous type, can be simply boiled. It's the only type of cassava permitted in Australia and New Zealand, but it also has to be cooked according to strict standards.