[Product Question] From retinol to retinal
I've used 1% retinol for 2 years so I have a good tolerance for it. Can I switch it straight out with 0.2% retinal, or do I still need to build up tolerance for that as well?
I've used 1% retinol for 2 years so I have a good tolerance for it. Can I switch it straight out with 0.2% retinal, or do I still need to build up tolerance for that as well?