Probiotics
Over-the-counterWhat is Probiotics?
Probiotics are live microorganisms that provide health benefits when consumed in adequate amounts. These beneficial bacteria and yeasts help maintain a healthy balance in your digestive system. Your gut naturally contains trillions of microorganisms, both helpful and harmful. Probiotics add more good bacteria to support this balance.
Most probiotic supplements contain bacteria from two main groups. Lactobacillus and Bifidobacterium are the most common types found in products. Different strains offer different benefits, so choosing the right probiotic depends on your specific health goals.
Probiotics are available without a prescription in various forms. You can find them as capsules, tablets, powders, and liquids. Many fermented foods like yogurt, kefir, sauerkraut, and kimchi also naturally contain probiotics.
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Common uses
- Supporting digestive health and regular bowel movements
- Reducing symptoms of irritable bowel syndrome
- Preventing and treating diarrhea from various causes
- Restoring gut bacteria after antibiotic use
- Supporting immune system function
- Managing symptoms of inflammatory bowel disease
- Reducing bloating and gas
- Supporting vaginal health in women
- Helping with lactose intolerance symptoms
How it works
Probiotics work by adding beneficial bacteria to your gut microbiome. This community of microorganisms plays a key role in digestion, nutrient absorption, and immune function. When harmful bacteria outnumber good bacteria, you may experience digestive problems, weakened immunity, or other health issues. Probiotics help restore this balance by increasing the population of helpful bacteria.
These good bacteria perform several important functions in your body. They help break down food and produce vitamins like B12 and vitamin K. They also create a protective barrier in your intestinal lining that prevents harmful bacteria from taking hold. Some probiotic strains produce substances that kill or slow the growth of harmful bacteria. Others help reduce inflammation and support your immune system by communicating with immune cells in your gut.
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Dosage information
Probiotic dosage is measured in colony forming units or CFUs. Most supplements contain between 1 billion and 10 billion CFUs per serving. Some products contain 50 billion CFUs or more for specific health conditions. Start with a lower dose and gradually increase to minimize digestive discomfort. Take probiotics with or without food, depending on the product instructions. Some strains work better when taken with food, while others survive better on an empty stomach. Follow the label directions for your specific product. Store probiotics according to package instructions, as some require refrigeration while others are shelf stable.
Side effects
- Mild gas or bloating, especially during the first few days
- Temporary digestive discomfort or stomach upset
- Changes in bowel movements
- Mild headache or thirst
Most side effects are mild and go away as your body adjusts. Serious side effects are rare but can occur in people with weakened immune systems or serious underlying health conditions. Stop taking probiotics and contact your doctor if you develop severe stomach pain, high fever, or signs of infection. People with compromised immune systems, critically ill patients, or those with central venous catheters should consult a doctor before taking probiotics.
Drug interactions
- Antibiotics may reduce probiotic effectiveness by killing beneficial bacteria
- Immunosuppressant medications may increase infection risk from probiotics
- Antifungal medications may interfere with yeast-based probiotics like Saccharomyces boulardii
- Avoid probiotics if you have a weakened immune system or are critically ill
- Use caution if you have a central venous catheter or short bowel syndrome
- Tell your doctor about all supplements you take, including probiotics
Blood test monitoring
Probiotics typically do not require regular blood test monitoring for most healthy adults. However, if you have underlying health conditions or take probiotics for specific medical reasons, your doctor may recommend periodic testing. People with inflammatory bowel disease may need tests to monitor inflammation markers like C-reactive protein. Those with immune system concerns might benefit from monitoring white blood cell counts and immune function markers. Rite Aid offers blood testing services with over 200 biomarkers that can help you and your doctor track your overall health, including markers related to digestive health and immune function. Two tests per year at $349 annually can provide valuable insights into how your body responds to probiotic supplementation.
Related blood tests
Taking Probiotics? Monitor your levels.
- Track how your body responds
- Catch side effects early with blood work
- Share results with your doctor
Frequently asked questions
No, probiotics are available over the counter without a prescription. You can purchase them at Rite Aid pharmacies and many other retail locations. However, if you have specific health conditions or take medications, talk to your doctor or pharmacist before starting probiotics to ensure they are safe for you.
Most people notice changes within 2 to 4 weeks of regular probiotic use. Some people experience improvements in digestive symptoms within a few days. The timeline varies depending on your specific condition, the probiotic strain, and the dosage. Consistent daily use is important for maintaining benefits, as the effects typically fade when you stop taking them.
It depends on the specific probiotic strain and product formulation. Some probiotics survive better when taken with food, particularly with a meal containing some fat. Others work best on an empty stomach. Check your product label for specific instructions, as manufacturers test their formulations to determine the best timing for survival and effectiveness.
Yes, but timing matters to get the most benefit. Take probiotics at least 2 to 3 hours apart from your antibiotic dose. Antibiotics kill bacteria, including the good bacteria in probiotics, so separating doses helps more probiotics survive. Continue taking probiotics for several weeks after finishing antibiotics to help restore your gut bacteria balance.
Different probiotic strains provide different health benefits. Lactobacillus strains often help with diarrhea and lactose intolerance. Bifidobacterium strains typically support immune function and may help with irritable bowel syndrome. Saccharomyces boulardii is a yeast that helps prevent antibiotic-associated diarrhea. Choose a strain that matches your specific health goals.
Some probiotics require refrigeration while others are shelf stable. Check your product label for storage instructions. Refrigerated probiotics often contain more delicate bacterial strains that need cold temperatures to stay alive. Shelf-stable probiotics use specially protected strains or freeze-dried technology that keeps bacteria dormant until consumed. Proper storage ensures maximum potency.
Most healthy people do not need regular blood testing while taking probiotics. However, if you have inflammatory bowel disease, immune system issues, or other health conditions, your doctor may recommend monitoring certain markers. C-reactive protein can track inflammation levels, while white blood cell counts assess immune function. Rite Aid offers blood testing services with over 200 biomarkers to help monitor your overall health.
Yes, probiotics are generally safe for children when used appropriately. Many probiotic products are specifically formulated for children with lower CFU counts and kid-friendly flavors. Probiotics may help with childhood diarrhea, colic, and digestive issues. Always consult your pediatrician before giving probiotics to infants or children to determine the right strain and dosage.
Look for products that list specific bacterial strains, not just general names like Lactobacillus. Check the CFU count to ensure adequate dosage, typically at least 1 billion CFUs. Choose products from reputable brands that test for purity and potency. Consider whether you need a refrigerated or shelf-stable option based on your lifestyle. Your Rite Aid pharmacist can help you select a quality probiotic for your needs.
Yes, many fermented foods naturally contain probiotics. Yogurt with live active cultures, kefir, sauerkraut, kimchi, miso, and kombucha all provide beneficial bacteria. Eating a variety of these foods can support gut health. However, supplements provide higher and more consistent CFU counts than food sources, which may be necessary for specific health conditions. Combining probiotic-rich foods with supplements often works well.