Streptococcus thermophilus St-21

Across the corpus

How this organism is actually sold

Printed CFU per serving

150,000,000 – 5,000,000,000; median 500,000,000. Measured on the 10 of 52 published products carrying it whose latest published label prints a figure for it; the rest print a blend total or no quantity, and earlier label versions in the table below may print other figures. 0 row(s) print a CFU below 1 000 and are excluded as a label or parsing artefact.

Cost per day

$0.88 – $0.88; median $0.88. Measured on the 1 of 52 published products carrying it with an observed price and a computable days-of-supply.

Forms

Capsule: 40 · Other (e.g. tea bag): 2 · Powder: 7 · Tablet or Pill: 3 · counted across the 52 of 52 published products whose label states a form

Brands carrying it

douglas-laboratories (4) · mass-probiotics (3) · now (9) · probiocare (4) · protocol-for-life-balance (4) · the five largest of 29 brands with a published product

Published product pages

52

Products

Published products carrying this organism

The 12 highest-scoring of 52 published products carrying it.

Reformulations

Label changes involving this organism

1 change(s) to this organism's own row, observed on 1 product(s). A change is counted only between two snapshots whose ingredient rows were both parsed; a first observation is not a change.

• Protocol For Life Balance Ortho Dophilus: 74567 → 326462

Species and related strains

Streptococcus thermophilus

• Streptococcus thermophilus HA-110
• Streptococcus thermophilus UAST-09
• Streptococcus thermophilus SD-5207
• Streptococcus thermophilus Y08
• Streptococcus thermophilus CUL-68
• Streptococcus thermophilus TH-4
• Streptococcus thermophilus UASt-9
• Streptococcus thermophilus YO8

Axis 1 · inverted

Containing label versions

Showing 96 of 96 rows, ordered by Gut Index Score descending, then DSLD label ID. Download full CSV · Download full JSON.

Axis 4

Reddit mention panel

0 observed mentions; no aggregate panel matched this entity.

Products

Also carried by

40 further published products carry it beyond the table above.

XYMOGEN ProbioMax Complete DF · NOW Probiotic-10 25 Billion · Protocol For Life Balance ProtoDophilus · Altrum Supreme Probiotics · New Sun Advanced Probiotics · Apollo Sun ProBio · LuckyVitamin Probiotic 10 Strains 100 Billion CFU · NOW Gr8-Dophilus · Mass Probiotics GoLive Probiotic + Prebiotic Flavorless · Metagenics UltraFlora Spectrum · NOW 4x6 Acidophilus · Protocol For Life Balance Bifido Digest · NOW Clinical GI Probiotic · NOW Berry Dophilus Kids · Protocol For Life Balance Chewable Probiotic · LuckyVitamin Children's Probiotics 2 Billion CFU Berry Flavor · Mass Probiotics GoLive Berry Pomegranate · NOW Cranberry Mannose + Probiotics · Mass Probiotics GoLive Plus Probiotic + Prebiotic Matcha Tea with Ginger & Yuzu · Stonehenge Health Dynamic Biotics for Women · Dr. Wholeness Flora Start Kids · Ortho Molecular Products FloraBoost · Nature's Way Fortify Optima 50+ Probiotic 90 Billion · Thrive Naturals Advanced Probiotic Complex · Nova Nutritions Probiotic 30 Billion CFU's · NOW Aloe 10,000 & Probiotics · Metabolic Maintenance Probiotic HPSS · Nature's Truth Ultimate Probiotic Balance · Best Naturals Probiotic 30 Billion CFU's · NOW Probiotic-10 100 Billion · InnovixLabs Multi-Strain Probiotic · NOW Probiotic-10 & Bifido Boost · Swanson Ultra Probiotic Complex · Nature's Way Fortify Optima Fortify Optima Daily Probiotic + Prebiotics · Stonehenge Health Dynamic Biotics · ProBioCare 35 Billion Probiotics Delayed Release · NuMedica HiFlora-5012 · ProBioCare Men's 100 Billion Probiotics Delayed Release · ProBioCare Women's 100 Billion Probiotics Delayed Release · ProBioCare 75 Billion Probiotic Delayed Release

Elsewhere in this release

Related pages

Findings computed over the whole corpus: Strain naming census · Label designation changes · Strain dose match · Stability literature gaps

Tools: DSLD product check · Unit value calculator

Citation

Cite this page

Ivitskiy, I. (2026). Streptococcus thermophilus St-21. Gut Registry, release 2026-09-20. Elanvale Ltd. https://gutregistry.com/s/streptococcus-thermophilus-st-21/

The underlying tables are published under CC BY 4.0: this page as CSV · as JSON · full release and data dictionary. Cell-level provenance names the source record and its observation date.

Citable atoms

Release claims

1. Streptococcus thermophilus St-21 appears on 96 of 13,330 labels in the NIH DSLD snapshot (Sep 2026), from 31 brands; tied with 1 designations by distinct label count.

   96 / 13330 observed label versions · NIH DSLD snapshot Sep 2026 · entity.prevalence · checked 2026-09-20T00:00:00Z · snapshot b7633f732437

2. 14 of 96 containing labels in the NIH DSLD snapshot (Sep 2026) print a quantity for Streptococcus thermophilus St-21 (14.6%); 1 light records have quantities unavailable.

   14 / 96 containing labels · NIH DSLD snapshot Sep 2026 · entity.quantity · checked 2026-09-20T00:00:00Z · snapshot b7633f732437

3. No indexed strain-level randomized human trial report was found in this ledger version (as of 2026-09-15). 0 records (retracted records excluded; 0 retracted records match the query separately).

   Published PubMed query

   0 / 0 loaded PMID records · NIH DSLD snapshot Sep 2026 · entity.evidence · checked 2026-09-20T00:00:00Z · snapshot b7633f732437

4. 1 interventional studies on ClinicalTrials.gov match the published query.

   Published ClinicalTrials.gov query

   1 / Not available in this release. interventional registry studies · NIH DSLD snapshot Sep 2026 · entity.registered_trials · checked 2026-09-20T00:00:00Z · snapshot b7633f732437

5. 5 of 70 SKUs containing Streptococcus thermophilus St-21 have a numeric price observation (7.1%) in the release accompanying the NIH DSLD snapshot Sep 2026.

   5 / 70 containing SKUs · NIH DSLD snapshot Sep 2026 · entity.price · checked 2026-09-20T00:00:00Z · snapshot b7633f732437