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Why do farts smell so bad? A microbiologist explains the odors brewing in your gut

Gut microbes make most fart gases, but sulfur compounds create the smell and persistent foul odor can signal irritable bowel syndrome or food intolerance.

Your farts’ aromas are tuned to your diet – and your overall health.

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The ConversationThe Conversation
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Why do farts smell so bad? A microbiologist explains the odors brewing in your gut

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·Boston, United States
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The Conversation broke the news in Boston, United States on Monday, November 9, 2026.
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