Lively acidity

Exploration Stage: Troll Market
From: Juliette
Description: I wish I didn't believe these lies! My landlady may have had some bad experiences with me, but she would never poison me! All her food was fresh, you know. Like that wonderful lemonade, for example. Can you find it for me?
Completed: This lemonade looks like it was made right now with fresh squeezed lemons. How could it be poisoned? But it was the same a few days ago. How is that possible?