Glycolic from one brand, salicylic from another, a lactic acid product for weekends — layering acids yourself is one of the most common skincare routines, and one of the easiest to get wrong. With Obagi's new multi-acid peel pads just launched in the UK, here is what each acid actually does, where DIY layering goes wrong, and who should leave acids alone altogether.

Nanofat is marketed as a stem cell facelift, but it contains no living fat cells and adds no volume at all. Two randomised trials found no sustained benefit past twelve months. We compare the published evidence with Sculptra, polynucleotides, PRP and hyaluronic acid filler, and explain what we do instead.