Regarding this, I recently came across an article stating:
“ Why You Should Never Put Retinol In A Jar” The reason being that: Retinol (weaker than actual Tretinoin) is very unstable. Every time it's exposed to light and air, it oxidises a little (i.e., it loses a bit of its effectiveness) until it stops working completely.
Cause apparently it is the most effective in tubes or dark bottles that come with a pump but "any type of packaging that exposes retinol to light and air is a NO-GO”
👆Please click on the link to read for further information.
idk but it kinda makes sense to me for example The Ordinary offers a wide range of Retinol products (which as already mentioned is a much weaker form of Ra, an derivative to be exact, and more natural )and they always come in dark bottles with a pump dispenser.
So idk how stable the synthetic form which is RA would then be, which is why I did some further research and found out the following:
”Retin A and Retinols – Prescription Retin A typically comes with an expiration date, which should be recognized for best results. Retinols lose some of their potency after 6-9 months, and those contained in an airless pump can be good for 1 year or more.” ( https://www.shahfacialplastics.com/b...roducts-go-bad )
It’s not that I want to discourage you from using it, but rather inform the possible downsides. Maybe you could share your experience with its effectiveness, if you do decide to use it