Two former employees of a leading international testing laboratory used by major Australian sunscreen brands have blown the whistle on alleged questionable data and incorrect testing practices, amid ongoing concerns about whether consumers can trust the products they are relying on for sun protection.

In an exclusive interview with 7.30, Brian Ecclefield, a former US business development manager with the testing company, Princeton Consumer Research, said he resigned over doubts about the accuracy and integrity of its Sun Protection Factor (SPF) testing.

"Relatively quickly after I started working at Princeton Consumer Research, I started to see some things which I questioned," Mr Ecclefield said.

"The risk for the Australian consumer in this case would be severe, the potential for sunbu

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