5 Health Risks of Raw Onions


Don't overdo it and mindful of onions' health hazards. Any food may cause allergies, even onions. Your immune system responds to dietary proteins to cause these allergies.

Do you often eat onions?

Digestion issues:

Raw onions contain fructans, a carbohydrate that may induce gas, bloating, and stomach pain in persons with IBS or other digestive sensitivities.

Heartburn and Acid Reflux:

In certain people, onions relax the lower oesophagal sphincter (LES), allowing stomach acid to backflow into the oesophagus and cause heartburn.

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Bad Breath:

Onions contain sulfur chemicals that cause foul breath. The smell of raw onions might remain on your breath after eating them.


Rarely, onions may cause allergies. Allergic responses may vary from itching, hives, and swelling to difficulties breathing. If you suspect onion allergies, visit a doctor.

Riskier Bleeding:

Vitamin K in onions helps blood coagulate. In warfarin-taking patients, eating a lot of raw onions, especially in supplements, may increase bleeding risk.