https://www.independent.co.uk/news/u...-a8276951.html
Quote:
The makers of Alpecin Caffeine Shampoo must no longer advertise that the product can reduce hair loss after a watchdog ruled there was no adequate evidence to support the claim.
Ads for the product stated: "German engineering for your hair. Shampoo is too small a word for it. Alpecin provides caffeine to your hair, so it can actually help to reduce hair loss. Simply apply daily and leave on for 2 minutes ... to help the Caffeine Complex penetrate your hair and scalp."
A consultant trichologist complained that the claim that the shampoo could "help to reduce hair loss" was unsubstantiated.
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This advertising ban doesn't mean that Alpecin doesn't reduce hair loss - just that this claim hasn't be adequately proven. This may be similar to how the US Health Department no longer actively advocates flossing to improve dental health. It's not because flossing doesn't help, its just that there haven't be adequate studies done to show its effectiveness.
https://www.nytimes.com/2016/08/03/h...-cavities.html