I wrote down the important ones (not everything though since I wasn't going to use MOST of the potions) V+O+C=Huge Breasts G+W+V=Huge Ass. Be warned that last update completely changed the potion combinations, so my previous chart was useless (these recipes will likely become useless too once the new update drops).
I can give you some other general helpful ones too: B+G+V=Long Hair G+C+B=Normal Face G+O+B=Built G+O+W=Shortstack V+R+C=Average Body O+V+P=Wide Hips O+V+C=Narrow Waist G+O+R= Slender
I hope this helps you and anyone else who's looking for this and wants to avoid the potion grind. Have a great day.
