Bacillus coagulans: Helps with lactose intolerance, digestion problems, stomach conditions, and controlling normal levels of cholesterol. It is also enhances the immune response and inhibits bacterial pathogens.

Bacillus subtilis: Is a strong probiotic that combats harmful microorganisms in the human body particularly pathogenic bacteria that causes dysentery.

Enterococcus faecalis F-100: The Enterococci constitute a major genus of the lactic acid bacteria (LAB). Some Enterococci strains are used successfully as human probiotics in health supplements, like FiveLac and ThreeLac. Their success as probiotics has been attributed to factors such as acid and bile resistance.

Lactobacillus acidophilus: Some strains of L. acidophilus are considered "friendly" bacteria. This healthy bacteria inhabits the intestines and vagina and protect against unhealthy organisms. The breakdown of nutrients by L. acidophilus produces lactic acid, hydrogen peroxide, and other byproducts that make the environment hostile for undesired organisms.

L. acidophilus also tends to consume the nutrients many other harmful microorganisms depend on. During digestion, L. acidophilus also assists in the production of niacin, folic acid, and pyridoxine.
Some research has indicated L. acidophilus may provide additional health benefits, including improved gastrointestinal function, a boosted immune system, and a decrease in the frequency of vaginal yeast infections.

Lactose intolerance: It is known that lactose intolerant people can digest the lactose in yogurt better than the same amount of lactose in milk because of the Lactobacillus acidophilus.

Bifidobacterium longum: One of the most important residents in the human gastrointestinal tract, B. longum keeps the digestive system running smoothly, blocks the growth of harmful bacteria, and boosts the immune system.

FiveLac's other ingredients:
Vitamin C (as ascorbic acid)
Vitamin B6 (as pyridoxine)
Vitamin B1 (as thiamine)
Vitamin B2 (as riboflavin)