Perfect retinol starter!
Absolutely NO reaction. I started using a couple of times a week, and have gradually bumped up to every other day (I alternate with a lactic acid)
As this is a preventative, anti-aging product, don't expect to see dramatic results. However I have definitely seen an improvement. I am very prone to hormonal breakouts on my chin and these seem to be miles better since i've been using it.
A little also goes a long way.
A great introduction to retinol, and now i've used this i'll be going for a stronger formula for my next purchase.