Lactobacillus acidophilus is a probiotic found in fermented soy products, some types of yogurt, sweet acidophilus milk and some probiotic supplements. Preliminary evidence shows it may be helpful for preventing antibiotic-associated diarrhea, improving digestion, enhancing the immune system and minimizing the symptoms of inflammatory bowel syndrome, according to the University of Maryland Medical Center. However, it doesn't appear to be beneficial for weight loss.
Acidophilus and Weight
A meta-analysis of studies on the benefits of different types of Lactobacillus probiotics published in Microbial Pathogenesis in August 2012 found that some species were more likely to cause weight gain in people than weight loss, including Lactobacillus acidophilus. The species that appeared to be most beneficial for weight loss in people was Lactobacillus gasseri.
Acidophilus could cause side effects, including diarrhea, gas and an upset stomach. People with weakened immune systems or artificial heart valves should avoid probiotic supplements. Acidophilus supplements could interfere with antibiotics and the ulcerative colitis medication sulfasalazine, so speak with your doctor before taking this probiotic to make sure it is safe for you.