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There have been many instances around the globe where consumer

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advocacy groups found certain sunscreens to have a lower SPF

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than advertised by the product. Huffpost confirms in the

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latest consumer reports. Annual test on sunscreens, only

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three of the 71 tested sunscreens were shown to have

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their labeled SPF. Despite all of the tested sunscreens

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being marked as SPF 30 or above, only 20

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one per cent were above SPF 30 40 per cent

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were below SPF 15. SPF 30 is the level

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recommended by dermatologists, Australian based cosmetic chemist, Michelle

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Wong says to determine a product's SPF. Typically 10

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to 25 subjects are used as the test requires 10

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to 20 valid results with a maximum of five invalid

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results. Wong continues testing. Labs keep testing until

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the results are consistent enough to determine an SPF.

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If the results are too inconsistent, they stop alongside

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Dr Rachel Ho. A Singapore based aesthetic physician Wong

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agrees with the following. If in doubt of a

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sunscreen's claims, I recommend choosing sunscreens from companies that

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have shared the results of their lab findings to support

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their claims.