1. High-purine Foods: Some foods, like animal innards, legumes, and seafood, are rich in purine. Excessive intake of these foods can increase uric acid production, leading to conditions like gout and uric acid kidney stones.

 2. Alcohol-containing Foods: Excessive alcohol consumption and consuming foods with alcohol can harm kidney health.

3. High-sugar Foods: Consuming excessive high-sugar foods can lead to fluctuations in blood sugar levels and eventually diabetes. 

4. High-salt Foods: Older adults should limit intake of high-salt foods to protect their kidneys.

Excessive sodium intake can strain the body's ability to excrete sodium ions, leading to kidney damage.