Donna said : 'Its like the Boots serum Protect and whatever. A doctor made a documentary looking for products that really make a difference. The brand which worked the best was £200+, the Boots one hadn't the same proved ingredient but a cheaper one that worked but not as well as the expensive one. Everyone rushed to buy the Boots No7 one of course.'
Donna,
i remember this study, sponsored by Boots, performed by a Manchester Dermatologist and the methodology was a double blind trial - one lot was given the Boots Protect & Perfect Serum, another group was given a placebo (i.e. a plain mosturiser) and none of them know who was using what.
only 1 serum, the Boots one was tested, no other brands at all, of any price range, £200+ or not were tested.
unusually, the contract stipulated that the result of this study would be published in the Dermatology equivalent of the British Medical Journal, no matter what the outcome for Boots i.e. proper science and peer-review publishing.
i remember looking into all of that at time, as it gave rise lots of articles about being able to repair sun damaged skin & wrinkles and the subsequent stampede at Boots stores
the BBC Horizon documentary was based on the study - or are you talking about another documentary, as i can't figure out how this bit you mentioned fits in : The brand which worked the best was £200+, the Boots one hadn't the same proved ingredient but a cheaper one that worked but not as well as the expensive one. ?