Probiotics are good, "friendly" bacteria that can have many health benefits. These health benefits include supporting a better immune system in patients suffering from irritable bowel disease or syndromes such as Crohn's disease and ulcerative colitis. Probiotics help digest dairy products for those suffering from lactose intolerance (Duvauchelle 1). They also give balance to those who must take antibiotics and help relieve side effects such as gas and cramps ("Probiotics, Symptoms, Causes, Treatment" 2). Vitamin A, vitamin K, calcium, potassium and protein are a list of many supplements provided in probiotics (Jerkunica, Bailey and Gall 1). Probiotics play one of the most important roles in the immune response system (Jerkunica, Bailey and Gall 1). However, there are many different types of probiotics that claim to work better than others. With refrigerated and non-refrigerated probiotics on the market, many have wondered what the huge difference is. There are various types of beneficial bacteria for probiotics Although there are billions of beneficial bacteria, branching off from one strain probiotic strains include Lactobacillus, Probiotic Acidophilus, Lactobacillus GG, Bifido, Bifidobacterium Lactis, and Bifidobacterium Infantis (Jerkunica, Bailey, and Gall 1). The most popular bacterial strain for probiotics is Lactobacillus acidophilus. It is known to act as a defense system against harmful bacteria when taking antibiotics (Jones 1). Lactobacillus has at least 140 known benefits regarding liver function, the immune system, the digestive tract, and more (Jerkunica, Bailey, and Gall 1). This bacteria is known to fight cramps, diarrhea and gas. Scientific evidence has shown that the problem... half of the article... Causes, Treatment - What are the health benefits of probiotics on MedicineNet." Medicinenet.com. Web. 04 November 2011. .Terry , Sarah. "Recommended probiotics | LIVESTRONG.COM." LIVESTRONG.COM - Lose weight and get fit with diet, nutrition and fitness tools | LIVESTRONG.COM. 26 May 2011. Web. 04 November 2011. .VSL#3. Advertising. VSL#3 The Living Shield . Web. November 4, 2011. .Wasserman, Robin “Probiotics That Don't Need Refrigeration | LIVESTRONG.COM." LIVESTRONG.COM - Lose weight and get fit with dietary, nutritional and fitness tools | LIVESTRONG.COM. 28 March 2011. Web. 04 November. 2011. .