I have been considering having Profhilo but another treatment called Pluryal skin booster has been suggested, have you tried the latter and is one better than the other?

Yes, I’ve heard of the Pluryal skin booster, it’s a good treatment – there are a great many brands of these ‘injectable moisturisers‘ (skin boosters are another term for the same thing) and they all do a similar job to regenerate the skin and improve its condition. If this is what your practitioner is suggesting, and you know and like their work, I’d give it a go. They will have their reasons for having chosen this particular brand, you should ask them what they consider to be its advantages over other brands.