A correct balance of intestinal bacterial flora is essential for the proper digestion and utilization of nutrients. Beneficial bacteria- such as Lactobacillus acidophilus and Bifidobac-terium bifidum- are called probiotics. Probiotic bacteria favourably alter the intestinal microflora balance- inhibit the growth of harmful bacteria- promote good digestion- boost immune function- and increase resistance to infection. Acidophilus and bifido bacteria maintain a healthy balance of intestinal flora by producing organic compounds—such as lactic acid- hydrogen peroxide- and acetic acid—that increase the acidity of the intestine and inhibit the reproduction of many harmful bacteria. Probiotic bacteria also produce substances called bacteriocin- which act as natural antibiotics to kill undesirable microorganisms. Sona AcidoBifidus helps establish and maintain a favourable intestinal flora- especially during and after a course of antibiotics and bouts of diarrhoea. Recommended for children and also adults with throat yeast infections.