Probiotics
Digestive Support
Irritable Bowel Syndrome
A daily drink containing probiotics significantly reduced IBS symptoms in one study.Irritable Bowel SyndromeIn several double-blind trials, probiotic products have been found to relieve symptoms of IBS. Preparations that have been found to be effective include 1) a combination of Lactobacillus rhamnosus GG, L. rhamnosus Lc705, Propionibacterium freudenreichii ssp. shermanii JS and Bifidobacterium animalis ssp. lactis Bb12;8 2) Lactobacillus GG;9 3) a combination of Lactobacillus acidophilus NCFM and Bifidobacterium lactis Bi-07;10 and 4) a product known as VSL#311Constipation
Research has shown that the probiotic strain Lactobacillus casei Shirota may help relieve chronic constipation after two weeks of supplementation.ConstipationIn one double-blind study, 70 people (average age, 44 years) with chronic constipation were randomly assigned to receive 65 ml/day of a probiotic beverage or placebo for four weeks.12 The probiotic beverage provided daily at least 6.5 billion colony-forming units of Lactobacillus casei Shirota. The treatment group began showing statistically significant improvements at the end of the second week. At the end of the treatment period, the proportion of patients having moderate or severe constipation was 34% in the active-treatment group and 83% in the placebo group. Another double-blind trial found that a probiotic supplement taken for 4 weeks significantly increased bowel movement frequency in adults with constipation. The product used in that study provided 200 million colony-forming units of Lactobacillus reuteri DSM 17938 per day, and was taken twice a day after meals.13Oral Health
Tooth Decay
Supplementing with probiotics may inhibit cavity-causing bacteria.Tooth DecayIn a double-blind study of children aged 1 to 6 years, supplementation with Lactobacillus GG five days a week in milk for seven months reduced the incidence of cavities by 49%, compared with unsupplemented milk.14 The amount of Lactobacillus added to the milk was 5 to 10 x 105 CFU per ml.
In another study, supplementing with Lactobacillus reuteri strain ATCC 55730 (derived from breast milk) significantly decreased the number of children who had dental cavities at 9 years of age. The probiotic was given in the amount of 108 colony-forming units per day to the mother during the last 4 weeks of pregnancy, and then to the infant in the same daily amount during the first year of life.15Blood Sugar and Diabetes Support
Type 2 Diabetes
Probiotics can improve blood glucose control, as well as cholesterol and triglyceride levels, in people with type 2 diabetes.Type 2 DiabetesThe gut microbiome is increasingly recognized as a key player in regulating immune and metabolic functions in the body, and a growing body of research suggests probiotics may be beneficial to people with type 2 diabetes. Multiple clinical trials, reviews, and meta-analyses have shown that probiotic supplements can have a positive impact on blood glucose control, cholesterol and triglyceride levels, and blood pressure in people with type 2 diabetes.16,17,18,19,20 One review reported the best evidence is for supplements with multiple strains, including Lactobacillus acidophilus,Lactobacillus bulgaricus,Streptococcus thermophilus, and Bifidobacterium lactis, taken in amounts of 7 billion or more colony forming units (CFU) for six to 12 weeks.21Weight Management
Obesity
A growing body of research shows probiotics can increase weight loss in those with overweight and obesity.ObesityPeople with obesity exhibit differences in gut microbiome composition compared to normal-weight individuals. Multiple controlled trials, meta-analyses, and reviews show probiotic supplements containing various Lactobacillus and Bifidobacterium strains can help to reduce body weight, waist circumference, fat mass, and percent body fat, and may improve cholesterol levels and other markers of metabolic health.22,23,24,25,26 These effects may be due to the influence of microbes present in the gut on appetite, mood, inflammatory status, nutrient intake and absorption, and metabolism.27 One analysis determined the best effects on body weight reduction were associated with the use of two or more strains of probiotic bacteria, doses below 1010 [ten billion] colony forming units per day, and probiotics in foods (versus capsules and powders).22Healthy Pregnancy and New Baby
Colic
Research suggests probiotics may benefit babies with colic who are breast-fed or fed milk-based formula.ColicIn a double-blind study of infants, supplementation of a standard milk-based formula with probiotic organisms (Bifidobacterium lactis and Streptococcus thermophilus) significantly reduced the frequency of colic, compared with the same formula without the probiotics.28 Another double-blind study found that the probiotic preparation, Lactobacillus reuteri DSM 17938, was an effective treatment for colic in exclusively breast-fed infants.29 In another study, L.reuteri DSM 17938 taken once a day was significantly more effective than simethicone, a drug frequently used to treat colic.30 Other double-blind research has confirmed the benefit of probiotics (particularly L.reuteri DSM 17938) in infants with colic.313233