In a review, The Cochrane Library of 14 Studies involving over 3000 people has concluded that probiotics can have a positive preventative effect against the common cold for both kids & adults.
According to a doctoral thesis published in the British Journal of Nutrition, daily intake of probiotics may help reduce low-level inflammation & prevent obesity.
In an article published by Olmstead, Snodgrass, Meiss and Ralston, we learn that colonization of an infant's gastro-intestinal tract begins at birth. They tell us that acquisition and normal development of the neonatal microflora is vital for the healthy maturation of the immune system. It is through a process called 'micrometabolic imprinting' that intestinal microflora progression has profound effects on health.
The "good bacteria" (also referred to as probiotics) in yogurt and certain other foods has been found to have a wide variety of health benefits.