The uproar was immediate for the brands named in the report, and also prompted a swift response from the Therapeutic Goods Association (TGA), which said it would investigate the findings and “take regulatory action as required”.

Ultra Violette bit back, saying they were “confident that Lean Screen is safe and effective” and detailing extensive testing of the product – which has been sold in almost 30 countries, including the UK, and retails for upwards of A$50 (£24, $33).

But less than two months later, it announced that Lean Screen would be recalled after it returned inconsistent results across eight different sets of lab testing.

“We are deeply sorry that one of our products has fallen short of the standards we pride ourselves on and that you have come to expect of us,” read a statement published to the brand’s Instagram account.

It added that it has “since ended the relationship with the initial testing lab”.

In the past fortnight, other brands have “paused” the sale of at least four more products, none of which were included in the Choice report.

Rach knows there is no way to prove that there is a link between her diagnosis and the brand of sunscreen she relied on. She says she is not alleging there is such a connection.

But she said Ultra Violette’s response to the scandal was like “a kick in the guts”.

She felt that they took no real accountability for the pitfalls of their product, and was let down by their decision to continue selling it for two months despite doubts over its efficacy.

“I just had like the five stages of grief, you know?” she said. “I was angry, I was upset, I was almost in denial.”

Like Rach, a horde of annoyed customers say the saga has shaken their faith in the industry.

“A refund isn’t really going to reverse years of sun damage, is it?” one wrote in response to Ultra Violette’s recall statement.

A spokesperson told the BBC Ultra Violette had retested all its other products and confirmed their SPF ratings.

“We were the first, and currently the only of the 16 products that failed Choice’s test to not just pause sales but withdraw the product all together, prioritising safety, and giving customers access to refunds and a product voucher,” they said in a statement.