I've only heard good things about yogurt with reference to Lupus.
1. A cup or two of yogurt a day can boost the immune functioning by stimulating the production of gamma interferon. Yogurt is said to also spur activity of natural killer cells that attack viruses and tumors. Yogurt with acidophilus cultures prevents vaginitis (yeast infections) in women. Helps fight bone problems, such as osteoporosis, because of high available calcium content. Acidophilus yogurt cultures neutralize cancer-causing agents in the intestinal tract. Plain old yogurt with L bulgaricus and S. thermophilus cultures, both live and dead, blocked lung cancers in animals.
2. We are encouraged to also eat calcium-rich foods, such as fat-free or low-fat milk and yogurt and to avoid fatty foods.
If you find information precluding yogurt, please let us know about it!