H
Htrtt
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You don't need to suffer using Tretinoin, Retinol is 20x weaker, but in the long term both have the same effectiveness
A Randomized, Double-blind, Split-face Study Comparing the Efficacy and Tolerability of Three Retinol-based Products vs. Three Tretinoin-based Products in Subjects With Moderate to Severe Facial Photodamage - PubMed
Retinol, has been shown to improve the appearance of photodamaged skin when applied topically, and is generally considered to be approximately ten times less potent than tretinoin. To assess this theory, three cosmetic formulations containing 0.25%, 0.5%, and 1.0% retinol were developed to...
pubmed.ncbi.nlm.nih.gov