Probiotics are live organisms that, when ingested in adequate amounts, provide a health benefit to the person who consumes them.  The most commonly used probiotics are lactobacilli, bifidobacteria and non-disease-causing yeasts such as Saccharomyces boulardii. Products labeled as “probiotics” are now widely available; however some may not contain sufficient live organisms to convey a health benefit due to formulation, storage conditions (consistent cool temperature is recommended) or failure to survive as they pass through the gastrointestinal tract. 
Probiotics offer many health benefits:

  • reduction or elimination of potentially disease-causing micro-organisms, toxins, mutagens, and carcinogens
  • modulation of  innate and adaptive immune defense mechanisms
  • promotion of apoptosis (death of cancer cells)
  • release of numerous nutrients, antioxidants, and other factors necessary for recovery from illness 

   Probiotics are important in recolonizing the intestine during and after antibiotic use. Preparations containing one or more strains of beneficial bacteria can prevent or lower the risk of antibiotic-associated diarrhea and “traveler’s diarrhea”. Infection of the colon with Clostridium difficile, can occur following antibiotic therapy and lead to a serious complication known as pseudomembranous colitis. Probiotics may prevent the development and recurrence of C. difficileinfection. Probiotics may also be used to treat inflammatory bowel disease, irritable bowel syndrome, and food allergy. Evidence is emerging for the effectiveness of probiotics in the prevention of postoperative infections. Potentially preventable conditions range from necrotizing enterocolitis to urogenital infections, skin diseases, respiratory diseases, and dental caries (cavities). Scientists are intrigued by the possibility that probiotics could lower cholesterol and reduce the risk of cancer and kidney stones. Future uses of probiotics may include the treatment of cystic fibrosis and rheumatoid arthritis. 
   Some experts believe that probiotics should be part of the daily diet, because our immunity is frequently compromised. Allergies, atopic skin diseases like eczema, asthma, autoimmune diseases, and other immune-related conditions are on the rise because:

  • Improved hygiene prevents spread of disease by decreasing exposure to harmful bacteria (“germs”), yet this advancement also means that our immune systems are not adequately stimulated, allowing immune-related conditions to develop.
  • Changes in our environment and diet, such as treatment of meat and poultry with antibiotics, result in consumption of fewer bacteria to challenge our immune systems.
  • Drugs, especially antibiotics, kill or cause mutations in microorganisms that normally live in our gastrointestinal (GI) tracts, decreasing the ability of this “normal flora”  to mount an immune response when we are exposed to substances that might compromise health. 

    Probiotics have been clearly shown to boost immunity, especially in subjects with less than adequate immune function such as the elderly. Twice daily supplementation with Bifidobacterium lactis was found in a double-blind trial to significantly enhance various aspects of immune function in a group of healthy elderly people after only six weeks of supplementation. A study published in 2010 suggests that probiotics may lower the risk of common childhood illnesses such as ear infections, strep throat, and colds. 
   Probiotics secrete enzymes that promote healthy digestion. For example, acidophilus is a source of lactase, the enzyme needed to digest milk sugar, which is lacking in lactose-intolerant people. Probiotics may be helpful in preventing malnutrition, improving calcium absorption, and in relieving constipation. Recent research also suggests that probiotics may decrease Helicobacter pylori infections which are responsible for gastric ulcers, and decrease the risk of certain cancers. 
   Probiotics may reduce the recurrence of urogenital infections in women. Most cases of bacterial or yeast vaginitis and urinary tract infection arise from contamination with bacteria from the woman's gastrointestinal tract, as microbes travel the short distance from the anus to the vagina. The more common presence of these pathologic organisms has led to an increase in bacterial vaginitis which in turn has increased the rate of preterm labor and premature births. Regular oral consumption as well as vaginal use of probiotic bacteria may help to prevent bacterial vaginitis.  
   Yogurt is often promoted or even recommended as a source of probiotics. However, different brands of yogurt can vary greatly in bacterial strains and potency. Some (particularly frozen) yogurts do not contain any live bacteria. “…there’s no evidence thatLactobacillus acidophilus, which is used in many commercial yogurts, has any benefits for diarrhea,” according to Martin Floch, MD, a professor of gastroenterology at Yale University, co-author of Probiotics: A Clinical Guide, and a consultant for the Dannon Company.
   Specific probiotic organisms appear to be useful for particular illnesses. Probiotic preparations should say the name of the specific bacteria they contain, as well as how many organisms a single dose provides. The amount of probiotics necessary to replenish the intestine varies according to the extent of microbial depletion and the presence of harmful bacteria. One to two billion colony forming units (CFUs) per day of acidophilus is considered to be the minimum amount for the healthy maintenance of intestinal microflora. Some S. boulardii research has used 500 mg taken four times per day. It seems that, at least for acute infectious diarrhea, higher doses of probiotics given for short courses are more effective than lower doses and are equally safe. Adequate doses of probiotics can be provided as standardized supplements in powder, liquid extract, capsule, or tablet form.
Research continues to report additional benefits of probiotics to prevent and treat illness. a

Please contact our pharmacy for more information about currently recommended formulations and suggested doses.


Aliment Pharmacol Ther. 2012;35(12):1355-1369.
Clin Lipidology. 2012;7(5):501-507.
Pediatr Infect Dis J. 2012;31(8):859-862.

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Probiotics are live microorganisms that, when administered in adequate amounts, provide a health benefit for the host. Probiotic bacteria favorably alter the balance of the intestinal microflora, inhibit the growth of harmful bacteria, promote good digestion, boost immune function and increase resistance to infection.

People with flourishing intestinal colonies of beneficial bacteria are better equipped to fight the growth of disease-causing bacteria. Probiotics such as Lactobacilli and bifidobacteria maintain a healthy balance of intestinal flora by producing organic compounds - lactic acid, hydrogen peroxide, and acetic acid - that increase the acidity of the intestine and inhibit the reproduction of many harmful bacteria. Probiotic bacteria also produce substances called bacteriocins, which act as natural antibiotics to kill undesirable microorganisms.

Trillions of bacteria normally live in the human digestive tract. These bacteria
and their human hosts have a symbiotic relationship: the bacteria help digest food, provide protection from disease, andimprove immune functions.

Without these bacteria, humans could not survive very long. Unfortunately, many people suffer from illnesses related to an imbalance of these gastrointestinal bacteria - illnesses which are caused by too many aggressive bacteria and too few defensive, "healthy" ones.

Allergies, eczema, vaginal and urinary tract infections, diarrhea, and inflammatory bowel disease are just a few of the medical conditions known to arise when unhealthy bacteria overgrow and outnumber the healthy ones in the human gastrointestinal system. Fortunately, probiotics provide an easy way to put things back into balance.


Gut microbiota composition is regarded as one of the major etiological factors involved in control of body weight and many studies investigating its link to obesity have been conducted in the past several years. Dysbiosis of the gut microbiota is an important factor in weight gain, meaning that alterations in the composition of gut microbiota show disturbed balance of beneficial and detrimental bacteria.

This unbalanced state promotes intestinal inflammation-induced metabolic disorders (insulin resistance, diabetes, and obesity) and administration of probiotics was considered as an important therapeutic manipulation in many studies. Several clinical studies have shown administration of diversified probiotic flora of Bifidobacterium spp and Lactobacillus spp resulted in decreased weight, BMI, and fat mass in subjects. They also showed probiotic intake significantly reduced weight-gain inducing endotoxemia and chronic gut inflammation. The probiotic-induced weight loss in women was associated not only with significant reductions in fat mass and circulating leptin concentrations but also with the relative abundance of bacteria of the Lachnospiraceae - a bad bacteria which induces weight gain - in the gut.

Maintenance of the gut environment is a key factor in determining outcome in the care of critically ill and postoperative patients. The use of non-digestible oligosaccharides (prebiotics) can fortify intestinal microflora and stimulate their growth. Prebiotics have been shown to reduce the rate of infection and restore health in sick and postoperative patients. A combination of prebiotics and probiotics is referred to as "synbiotics". Synbiotic treatment in critically ill patients is limited, but results from studies of severe acute pancreatitis, chronic hepatitis and liver transplantation offer great hope for the future.

Probiotics may be beneficial for the following problems:

  • Diarrhea
  • Yeast Infections 
  • Tooth Decay
  • Food Allergies
  • Vaginitis
  • Pancreatitis
  • Eczema
  • Inflammatory Bowl Disease
  • Colic
  • Impaired Immune System
  • Weight Loss
  • Constipation 
  • Acne 
  • Rosacea
  • Gastroparesis
  • Gastroparesis
  • Gastric Ulcers
  • Thrush

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