I already use their Retinoid 2 x nights a week and their Niacinamide the rest of the week under moisturiser. I have also found an almost empty vitamin C suspension that I’d tried (unsuccessfully) for a couple of sun spots that I’m now trying to use up by putting on occasionally, and I use their peeling solution two mornings a week (not when I’m using retinol that night).
So, is the Argireline Solution 10% worth adding in -if so, where on Earth do I squeeze it in?
TIA.