Australians have been studying the claims on their sunscreen bottles after 18 sunscreens were pulled from sale or paused from supply over SPF claim concerns.

Additional testing has revealed that several sunscreens on the Australian market may not meet their own SPF claims, sparking alarm among Aussies who use them.

Now the Therapeutic Goods Administration (TGA) is "considering whether to take regulatory action" with respect to some of the pulled or paused sunscreens.

Here's what you need to know about how SPF ratings work and how sunscreen is tested in Australia.

Why have sunscreens been pulled from shelves?

The TGA confirmed on Tuesday that six more sunscreens had been voluntarily removed from its register in the last two weeks of September.

Concern was sparked in June, wh

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