Related Experiment Video
Updated: Jul 8, 2026
08:38
Novel Production Protocol for Small-scale Manufacture of Probiotic Fermented Foods
Published on: September 10, 2016
The safety of probiotics
1Division of Geographic Medicine and Infectious Diseases and Department of Medicine, Tufts-New England Medical Center, and Tufts University School of Medicine, Boston, Massachusetts 02111, USA. DSnydman@tufts-nemc.org
Summary
Probiotics offer health benefits but have theoretical safety concerns. Evidence from clinical trials indicates probiotics are generally safe for consumption, with rare adverse events.
Area of Science:
- Microbiology
- Gastroenterology
- Public Health
Background:
- Probiotics are live microorganisms conferring health benefits.
- Widespread daily consumption for perceived wellness.
- Commonly used genera include Lactobacilli, Bifidobacteria, and Lactococci.
Purpose of the Study:
- To review and examine the evidence for probiotic safety.
- To address theoretical concerns regarding probiotic use.
- To evaluate the risk-benefit profile of probiotic consumption.
Main Methods:
- Review of existing scientific literature and clinical trial data.
- Analysis of epidemiological data on probiotic usage.
- Examination of theoretical safety concerns: infection, toxic effects, antibiotic resistance transfer.
Main Results:
- Rare instances of bacteremia or fungemia associated with probiotics exist.
- Epidemiological data does not show an increased population risk.
- Numerous controlled clinical trials demonstrate safe probiotic use.
Conclusions:
- Probiotics are generally safe for human consumption.
- Clinical trials confirm the safety of probiotic interventions.
- Probiotic research should include safety monitoring and antimicrobial susceptibility data.
Related Concept Videos
01:22Probiotics
Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
01:21Microbiota Modulation by Antibiotics
Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
01:27Microbes in the Production of Fermented Foods
Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
01:29Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
01:29Microorganisms in Medicine and Therapeutics
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
01:18Dysbiosis of the Gut Microbiota
The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...