NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated July 13, 2026

Probiotics

Probiotic ·Exploratory record · not publication-reviewed ·Updated July 13, 2026

Live beneficial bacteria that colonize the gut microbiome. Support digestion, immune function, mental health (gut-brain axis), and nutrient synthesis.

Evidence tier
Strong
Indexed sources
21 2009–2025
Interactions
0
Cost / month
$10.50 budget
Read the sources → Compare profiles
Publication status

Exploratory record, not a reviewed medical publication.

See the editorial and medical-review policies for the publication gate.

This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.

In short

What the research says.

A quick, data-only summary. The full evidence, dosing, and sources are below.

Probiotics is a probiotic most often used for gut health, immune support, mood via gut-brain axis. NutriStack rates the overall evidence as strong. A typical adult dose is 10–50 billion CFU daily, commonly taken as multi-strain with lactobacillus and bifidobacterium species; spore-based for shelf stability. This profile indexes 21 sources.

What it's good for
  • Gut health
  • Immune support7,19
  • Mood via gut-brain axis14,9
  • Digestion
  • Nutrient synthesis
What to watch for
  • Initial bloating/gas (die-off)
  • Rare infection risk in immunocompromised
  • Severely immunocompromised
  • Short bowel syndrome11,17
  • Central venous catheters

The bottom line

Evidence rating strong. Most-documented uses: gut health, immune support, mood via gut-brain axis. 21 sources indexed (2009–2025), with 0 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Compete with pathogenic bacteria for adhesion sites and nutrients (competitive exclusion). Produce short-chain fatty acids (butyrate, propionate, acetate) that nourish colonocytes and maintain gut barrier. Modulate immune response via dendritic cell and T-cell interaction. Produce neurotransmitters (serotonin, GABA) via gut-brain axis.

Class
Gut Health
Found in food
Yogurt, Kefir, Sauerkraut
Low-status signs
Dysbiosis, Bloating
Absorption
Water-soluble; take with food
Dosing

Dosing & protocol.

Common range
10–50 billion CFU daily
Recommended form
Multi-strain with Lactobacillus and Bifidobacterium species; spore-based for shelf stability

Take with a meal or 30 minutes before a meal containing some fat for best bacterial survival13,15

Cost

What it actually costs.

Real-world pricing across three quality tiers. Assumes Multi-strain CFU Blend.

BudgetBest value
$10.50 /mo
$0.35 per dose
Mid
$22.50 /mo
$0.75 per dose
Premium
$45.00 /mo
$1.50 per dose

Assumes one daily serving of a refrigerated or shelf-stable multi-strain product. Quality control and viable CFU count are the main price drivers. Updated 2026-04-02.

From food

The same dose, as food.

How much you'd eat to match a supplemental dose.

10-20 billion CFU probiotics
A mix of yogurt, kefir, kimchi, and fermented vegetables

Fermented foods help, but labels rarely guarantee strain-specific CFU the way supplements do.

Daily probiotic support
One serving kefir plus one serving live-culture yogurt or fermented vegetables

Food-first approaches are often excellent for maintenance.

Safety

Full safety detail.

Side effects

  • Initial bloating/gas (die-off)
  • Rare infection risk in immunocompromised

Contraindications

  • Severely immunocompromised
  • Short bowel syndrome11,17
  • Central venous catheters
Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Meta-analyses & systematic reviews

18

Randomized controlled trials

1
  • 19Effect of Lactobacillus rhamnosus GG on immune response to influenza vaccine in elderly nursing home residentsBoge T, Remigy M, Vber S et al. · J Nutr Health Aging · 2009

Reference material

2
FAQ

Common questions.

Quick answers about Probiotics, drawn from the data on this page.

What is Probiotics?

Live beneficial bacteria that colonize the gut microbiome. Support digestion, immune function, mental health (gut-brain axis), and nutrient synthesis.

What is Probiotics used for?

Commonly cited benefits of Probiotics include: Gut health; Immune support; Mood via gut-brain axis; Digestion; Nutrient synthesis. NutriStack rates the overall evidence as strong.

What is a typical dose of Probiotics?

A typical adult dose of Probiotics is 10–50 billion CFU daily. The commonly recommended form is Multi-strain with Lactobacillus and Bifidobacterium species; spore-based for shelf stability. These are general ranges, not personalized advice; confirm the right dose with a clinician.

What are the side effects of Probiotics?

Reported side effects include initial bloating/gas (die-off), rare infection risk in immunocompromised. This is educational information; check with a healthcare professional before use.

How strong is the evidence for Probiotics?

NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.

Use this with your stack

Probiotics in NutriStack.

Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.

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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.