Yes, age regression is one of the 4 potions in my Domdaniel stories (Domdaniel is my take on Hogwarts). The other 3 are strength*, and 2 lethal potions.
* Strength of whatever the partaker is weak in .
Yes, age regression is one of the 4 potions in my Domdaniel stories (Domdaniel is my take on Hogwart