The best probiotics: how to choose the right one

Probiotics: why “100 billion CFU” on a jar doesn’t mean better

The probiotic market is one of the most confusing in the supplement world. On the shelves there are jars with the numbers50, 100, 200 billion CFU—and the buyer thinks that the more the better. This is the main myth of the probiotic industry.

Truth: strain is more important than quantity. 10 billion of the correct strain will give a result that 200 billion of a random set will not. It's like an army: 10 special forces are more effective than 200 untrained recruits.

What are probiotics and why are they needed

The gut is home to more than 100 trillion microorganisms—that's more than there are cells in your body. This “microbiome” is not just a passenger. It actively influences:

• Immunity:70-80% of immune cells are found in the intestines
• Mood:The intestines produce 90% of the body's serotonin
• Digestion: Breakdown of fiber, synthesis of vitamins K and B12
• Barrier function:Preventing the penetration of pathogens through the intestinal wall
• Inflammation:A healthy microbiome suppresses chronic systemic inflammation

Probiotics are live microorganisms that, when taken in sufficient quantities, provide measurable health benefits. The key word is “measurable”: the effect of a particular strain must be confirmed in an RCT.

Key strains: what helps whom

Lactobacillus rhamnosus GG - the king of probiotics

The most studied strain in the world - more than 800 scientific publications. Opened in 1989, since then it has proven effective in many conditions:

• Diarrhea:Reduces the duration of acute diarrhea by 1 day (meta-analysis, 18 RCTs)
• Antibiotic-associated diarrhea:Reduces risk by 50%
• Atopic dermatitis in children:Reduces the risk when taken by the mother during pregnancy
• Strengthening the intestinal barrier:Increases mucin production and strengthens tight junctions

Brand: Culturelle - contains LGG. Dose: 10-20 billion CFU.

Lactobacillus plantarum 299v - salvation for IBS

If you have irritable bowel syndrome - this is your strain. Proven effectiveness in several RCTs:

• Reduced bloating and gas production
• Reducing abdominal pain
• Normalization of stool (works for both diarrhea and constipation)

Brand: Jarrow Formulas Ideal Bowel Support. Dose: 10 billion CFU.

Saccharomyces boulardii - with antibiotics

This is not a bacterium, but a yeast fungus. And that is why it is indispensable when taking antibiotics: antibiotics cannot kill it (they only act on bacteria).

• The only probiotic that can be taken at the same time with antibiotics
• Reduces the risk of Clostridium difficile infection (a dangerous complication of antibiotic therapy)
• Effective for traveler's diarrhea

Brand: Florastor. Dose: 5-10 billion CFU. No need for a refrigerator.

Bifidobacterium longum - psychobiotic

One of the key strains of the gut-brain axis. Reduces anxiety and improves mood through:

• Reduced cortisol and inflammatory cytokines
• Increased GABA production in the intestines
• Improving the integrity of the intestinal barrier (reducing the “leakage” of toxins into the blood)

Included in Seed DS-01 and other multi-strain complexes.

How many CFUs are really needed

• Prevention: 10-20 billion CFU - enough to maintain healthy microflora
• IBS / bloating:20-50 billion CFU of specific strains
• After antibiotics: 30-50 billion CFU (start on the first day of antibiotics and continue for 2-4 weeks after)
• More than 100 billion: No evidence of additional benefit. May cause bloating and discomfort

How to take it correctly

• On an empty stomach or 30 minutes before meals - survival rate is higher (less contact with hydrochloric acid)
• Wash down with water at room temperature (not hot - it will kill bacteria)
• Store in the refrigeratorif directed on the package (many strains are heat sensitive)
• S. boulardiiis the only one that does not require a refrigerator
• For antibiotics: Take the probiotic at least 2 hours before or after the antibiotic (except S. boulardii - it can be taken at the same time)
• Course:Minimum 4-8 weeks to evaluate the effect

Prebiotics: food for good bacteria

Probiotics without prebiotics are like seeds without fertilizer. Prebiotics are indigestible fibers thatfeed the good bacteriain the colon.

• Inulin - from chicory, onion, garlic. 5-10 g/day
• FOS (fructooligosaccharides) - from bananas, asparagus
• Resistant starch - from chilled potatoes, green bananas

Caution for SIBO: If you have bacterial overgrowth, prebiotics may worsen your symptoms. First treat SIBO, then restore the microbiome.

Strategy by situation

Just want to support my intestines

• Seed DS-01 (24 strains, 24 billion CFU) + prebiotic fiber from food
• Or Culturelle (LGG) + inulin 5 g/day

IBS / bloating / gas

• L. plantarum 299v(Jarrow) - 10 billion CFU
• Add a prebiotic after 2 weeks (not immediately - it may increase bloating)
• Exclude SIBO with your doctor

Taking antibiotics

• S. boulardii(Florastor) - from the first day of antibiotics, simultaneously
• After antibiotics: add multistrain for 4-8 weeks

Anxiety/bad mood

• Multi-strain withB. longum
• + Prebiotic fiber
• + Omega-3 (reduces neuroinflammation)

Security

• Probiotics are safe for most people
• Immunocompromised: In case of severe immunodeficiency (chemotherapy, AIDS, transplantation) - only with a doctor (risk of bacteremia/fungemia)
• First days: Temporary bloating and gas formation are possible (bacteria “settle in”). Goes away in 3-7 days
• SIBO:Probiotics and prebiotics may worsen symptoms - diagnosis first

Resume from Novird

Probiotics are not a panacea, but an important tool for supporting the intestines, immunity, and even mood. The main thing is to choose by strain, and not by the number of CFU on the jar.

• General health:LGG (Culturelle) or Seed DS-01
• IBS: L. plantarum 299v (Jarrow)
• Antibiotics: S. boulardii (Florastor) is the only option
• Mood:Multi-strain with B. longum

Golden rule: A probiotic without a prebiotic is like seeds on the asphalt. Feed your bacteria fiber from vegetables, fruits and whole grains. Or add inulin 5 g/day.