I originally purchased the travel
I originally purchased the travel size Retinoid 1 to test and build up my skin’s tolerance. I’ve been using Retinoid 2 for approx 3 weeks and I’ve had no issues or irritation - I take it right up to my eyes 👀 (other products have given me sore patches in this area). Honestly my skin has never looked so good - I’m using it in combination with pretty much all the Skin Rocks products and highly recommend!