Final answer:
Calcium and aluminum can have negative side effects on the body, such as an increased risk of certain diseases and gastrointestinal issues. Excessive calcium intake can lead to the accumulation of calcium oxalate crystals in the body, causing kidney damage.
Step-by-step explanation:
Calcium and aluminum have potential side effects on the body. Calcium intake has been associated with an increased risk of conditions such as colon cancer, osteoporosis, heart disease, macular degeneration, and possibly depression. On the other hand, aluminum-containing antacids can cause constipation, while calcium-containing antacids are not recommended for individuals predisposed to kidney stones. Moreover, excess calcium intake can lead to calcium oxalate crystal accumulation in the body, which can cause kidney damage.