A. To have a healthy kidney diet, you should eat lower phosphorus food. Lobster has 185 mg phosphorus in 100 g serving. Also, it's rich in protein, omega-3 fatty acids and less cholesterol which can give you a good renal diet. Be cautious of metal contamination in shellfish and other seafood since heavy metal ingestion through food may be damaging to your health. It can lead to kidney and brain damage.