Sunday Riley Good Genes random thoughts:
Key ingredients are just AHA and licorice (whitening anti-inflammatory) in gel-cream base. Nice! The additional ingredients look a bit magical but the plant extract stuff is more liability than anything else...nothing proven to work, potential irritants...silicones in there too, I see.
Similar actives in a liquid/toner Alpha-H Liquid Gold (glycolic, rather than lactic) for a small fraction of the price. Also nice product.
Lactic is not really soooo much gentler than glycolic. Maybe half, so effective from 10% rather than 5%...it's a larger molecule than glycolic so can feel more stingy. It's bit better at brightening, and I also find it more moisturizing.
I used to make a similar formulation myself...as a hand and leg cream (when you DIY everything is so cheap you can use fabulous actives all the time). If we assume decent activity levels of 10% lactic acid and 3% licorice extract in a nice base with some good general nutrients and oils then you can make a litre (1000ml) for less than 50 quid. I'm not talking about industrial costs either, and I'm being very generous on the pricing. You should get a positive effect very rapidly...because that's what lactic acid is good at.
Good Genes at 85 pounds for 30ml bottle? 