Pre-cut onions are not dangerous - Full Fact

It is perfectly safe to keep chopped onions in the fridge for up to a week.

Giant Eagle recalls onion products over contamination concern

FACT CHECK: Cut Onions Are Not Poisonous

This Enzyme Is Why Onions Make You Cry

Do Onions Absorb Bacteria That Cause Illness?

Onions don't become 'highly poisonous' if cut the day before

Low Fodmap Diet: What it Is, Uses & How to Follow

Can You Eat Sprouted Onions?

Do onions become toxic or otherwise dangerous within a day of

Why Do Onions Make You Cry?, More Onion Facts

Are Cut, Raw Onions Poisonous?

Do half cut onions exposed to air for 12 hours or more turn

Onions: Health benefits, health risks & nutrition facts

How to Store a Cut Onion: 14 Steps (with Pictures) - wikiHow