According to WebMD, yogurt is considered safe and poses little risk of side effects in healthy individuals. For this reason, yogurt can be regularly consumed by children, adults and pregnant women as part of the diet. In some cases, yogurt has become contaminated with bacteria, causing illness. For this reason, it is important that yogurt is prepared and stored properly to prevent contamination.
For people with compromised immune systems, such as people who have HIV or have undergone organ transplants, eating yogurt poses a small risk. In such cases there is a risk that Lactobacillus, one of the live bacteria in yogurt, may be allowed to reproduce to levels within the body that can cause illness. While this is rare, people with compromised immune systems should avoid eating large amounts of yogurt that contain live cultures without first speaking to a doctor.
Yogurt, made through the fermentation of milk, is used as a remedy to restore normal bacteria found in the intestines after the use of antibiotics. Regular consumption of yogurt has been found effective in treating vaginal bacterial and yeast infections, as well as preventing urinary tract infections. Yogurt consumption is also effective for managing high cholesterol and treating Helicobacter pylori infections.