SafeWork SA weighing claim 'flamin' hot' Doritos seasoning causing breathing difficulties in workers

South Australia's workplace regulator is looking into claims spicy seasoning from a popular chip is leaving workers at an Adelaide factory with breathing difficulties and skin irritation.

New extraction fans are being installed at the Smith Chip's factory where 'flamin' hot' Doritos are made, and parent company PepsiCo says worker safety is its "top priority".

The health concerns stem from a United Workers Union visit to the factory on December 19, when the union said workers raised "significant safety concerns regarding the improper handling of strongly irritating substances".

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The UWU said the spicy chip were produced every couple of weeks but the seasoning dispersed across the production area.

"After interviewing 13 workers from the afternoon shift, 11 reported various effects, including sneezing, coughing, eye and skin irritation, runny nose, sore throat, chest discomfort, and difficulty breathing," the union said, in a report to SafeWork SA.

It said the issue hadn't been resolved.

In a statement issued to the media, PepsiCo said safety was its top priority.

"We follow a number of safety procedures and protocols when producing products that include spicy seasoning," a spokesperson said.

"To further enhance these measures at our Adelaide site there is mandatory mask wearing during production of this product and we are installing additional extraction fans.

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"We are committed to working with our people and the union to address any further concerns."

SafeWork SA told 9news.com.au it was "currently considering the complaint lodged by the UWU earlier this month to determine whether further action is warranted".