Nephritis is inflammation of the kidney, due either to bacteria and their toxins or to toxic substances (e.g., mercury, arsenic, alcohol). A probiotic such as Lactobacillus acidophilus displaces harmful bacteria. Garlic has antibiotic properties. If heavy metals are involved, then homeopathic dilutions of those metals will be most helpful. With any kidney condition, it is important to drink at least 2 litres of purified water daily. It is usually also beneficial to eliminate excess protein in the diet, and to make sure not to overload the body with more supplements than it actually requires.