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Pureology hair strength
Claim made by: Asos.com
Location: Facebook post from Asos.com
Spotted on: 2017-10-06
Hair becomes 78% stronger after one use of Pureology hair products
Update 2017-10-17
ASOS took their figure straight from the Pureology website, and have had no sight of the evidence used to obtain the number used in their advertisement.
I have tried to contact Pureology, who have not replied.