Protein doesn't make you fart. But these ingredients do…

Send this to your gassy partner.

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Published: June 23, 2024 at 3:00 pm

Speak to dieticians, gastroenterologists or nutritional scientists and they’ll say that carbohydrates are more likely to turn you into a natural gas factory than protein. 

When undigested carbs ferment in the gut, they release gas. If you’re taking protein supplements, check the ingredient lists for things like fructose, lactose, xylitol or stevia. 

These sugars and sugar substitutes are likely the real culprits. If you’re taking a protein powder with milk or other dairy products, you may have an undiagnosed lactose intolerance. 


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Protein sources like lentils and beans often come with fibre and a type of sugar called oligosaccharides. 

Neither of these are easily digested and can also cause flatulence. 

A lot of meat and dairy products contain sulphur, which turns into hydrogen sulphide as it passes through the body and smells like rotten eggs. 

Farting is as natural as breathing but if you want to reduce the frequency of your emissions, try experimenting with your protein sources or diet in general. 

Also, chew your food and eat slowly.

This article is an answer to the question (asked by  Karl Stewart, Leicester) 'Why does protein make me fart?'

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