Alum, or potassium aluminum sulfate, is sometimes used to make leafy greens look fresher by soaking them in a diluted solution that gives a brighter, firmer appearance. However, this industrial-grade chemical isn’t safe for direct contact with food, and residue can remain on leaves even after washing. Overexposure to aluminum has been linked to health issues like kidney damage and neurological concerns. This deceptive practice highlights the importance of knowing where your food comes from and c