Currently we have a 4 maybe 5 things in the potion tab , allot of them aren't very usseful or have an alternitive to them.
Maybe add a skill that will add another tab to this one.
Herbalism LP cost : around 5-10k
One's you have the skill you can make vials with glassmaking fill these with water and go to a boiling couldron to craft potions with the ingredients.
Some potions will come in several sizes. small/medium/large
Health potion : Heals your soft HP in combat / Fills hunger and cannot be used while at 100% does not gain any FEP
Ingredients : Vial of water, Animal Blood , and some other stuff
Stamina potion : Heals your Run like a waterflask, can only be used once every "x" minutes does not work when at 100% stamina
These one are the most usseful but more could be added for example a potion that increases base stats for a while.
Potions should be hard to make adding another item that higher leveled villages want.