Thank you for playing!^^
About the potion, don't worry, you didn't miss anything. I didn't give any hint regarding what it might be other than its taste. And the only hints for its ingredients were very subtle and too vague (hinted by the NPC with the fruits hunt quest).So yeah that's on me lol.
There were others asking about it too. In case you still need a hint for it, here's a little hint: It's an enchantment/buffing potion which ingredients are a berry and a dropped item you can only get from one specific enemy^^