𝗣𝗼𝘄𝗲𝗿𝗳𝘂𝗹 𝗜𝗺𝗺𝘂𝗻𝗲 𝗛𝗲𝗮𝗹𝘁𝗵 𝗕𝗼𝗼𝘀𝘁𝗲𝗿: Zinc is a nutrient that plays many vital roles in your body. Be sure not to exceed the upper limit of 40 mg. Zinc's side effects include digestive issues, flu-like symptoms, and reduced copper absorption and antibiotic effectiveness.