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Top Picks — Gut Health

🦠 Best Gut Health Supplements

Prebiotics, probiotics, and gut barrier ingredients ranked by clinical evidence for microbiome health, IBS relief, and digestive wellness.

156 ingredients reviewed Ranked by clinical evidence

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Top 5 — Ranked by Evidence

Lactobacillus rhamnosus GG (LGG)

Most Clinically Studied Probiotic Strain Globally

10–20 billion CFU/day; 5–10 billion CFU/day commonly used in pediatric protocols

Sunfiber® (Partially Hydrolyzed Guar Gum)

IBS Symptom Management (Strongest Evidence Among PHGG)

5-7 g/day for digestive applications; up to 21 g/day in some clinical trials; pediatr

Probiotics (Multi-strain Blends)

Strain-specificity principle in probiotic evidence

1–10 billion CFU/day maintenance; up to 50 billion CFU/day therapeutic

Saccharomyces boulardii

Antibiotic-associated diarrhea prevention

250–500 mg twice daily (5–10 billion CFU/day); 250 mg three times daily for C. diffic

Psyllium Husk (Plantago ovata)

Digestive health and constipation/diarrhea relief

5–15 g/day psyllium husk (1–3 teaspoons); FDA cholesterol claim requires ≥7 g/day; ta

📈 Fastest Growing Gut Health Ingredients

Postbiotic, fiber, and strain-specific ingredients gaining traction with formulators in 2024–2026.

Sunfiber® (Partially Hydrolyzed Guar Gum)

IBS Symptom Relief (in Diagnosed IBS Patients)

5-6 g/day in the IBS trials; 10 g/day in the type 2 diabetes trial; up to 15 g/day in the…

EpiCor® (Postbiotic Yeast Fermentate — Cargill)

Constipation and GI discomfort reduction

Lactobacillus rhamnosus GG (LGG)

Most Clinically Studied Probiotic Strain Globally

Adults 10-20 billion CFU/day; AAD ≥5 billion CFU/day; pediatric AGE ≥10^10 CFU/day.

🔬 Future Gut Health Ingredients to Watch

Lower current evidence but active research underway — these may become top picks within 2–3 years.

Akkermansia muciniphila

Gut barrier integrity

10^10 cells/day of the pasteurized form was the amount used in the single human trial. Many…

AstraGin® (Astragalus and Notoginseng Saponin Extract)

Gut barrier and microbiome: one 8 person pilot in ulcerative colitis

50 mg twice daily (100 mg/day) in both supplementation trials; the two acute absorption tests…

Arabinoxylan (Arrabina®)

Selective prebiotic feeding of beneficial bacteria

15 g/day for 6 weeks in the impaired-glucose-tolerance trial; 6 to 12 g with a meal in the…

Recommended Gut Health Products

Heads up: NutraSmarts may earn a commission from purchases made through these links, at no extra cost to you. We curate these picks based on the same evidence we cite throughout the page. Full disclosure.

Real products featuring the best-evidenced gut health ingredients ranked above — chosen for clinically-studied forms and doses, third-party testing, and value. Match the supplement to your specific need.

Best for food-trigger gas & bloating Amazon →

Pure Encapsulations Digestive Enzymes Ultra with Betaine HCl

Multi-enzyme + Betaine HCl

Comprehensive vegetarian enzyme blend (protein, carb, fiber, dairy digestion) plus betaine HCl for low stomach acid support — addresses the most common bloating triggers including lactose, gluten, beans, and cruciferous vegetables. Pure Encapsulations is a top practitioner brand known for hypoallergenic, no-filler formulations.

Best for cramping and bloating Amazon →

IBgard Enteric-Coated Peppermint Oil

Enteric-coated peppermint oil — SST technology

Ultra-purified peppermint oil with a coating designed to release it in the small intestine rather than the stomach. Peppermint oil has good clinical evidence for bloating, cramping and gas. A widely gastroenterologist-recommended peppermint oil brand.

Best for microbiome imbalance Amazon →

Florastor Advanced Pro+Pre Probiotic

S. boulardii CNCM I-745 + prebiotics

Contains Saccharomyces boulardii CNCM I-745 — the most clinically-studied probiotic yeast strain, with strong evidence for gut function and post-antibiotic recovery. The Pro+Pre formulation adds prebiotics to support colonization. Shelf-stable (no refrigeration needed). Particularly useful after antibiotic courses or for chronic bloating tied to dysbiosis.

Best for slow digestion & post-meal heaviness Amazon →

Pure Encapsulations Ginger Extract

Zingiber officinale extract

Standardized Zingiber officinale (ginger) extract — supports gastric motility and addresses bloating tied to slow gastric emptying, post-meal heaviness, or nausea. Ginger is one of the most-studied botanicals for digestive function. Pure Encapsulations standard: hypoallergenic, no fillers, vegetarian capsules.

All Gut Health Ingredients (156)

Lactobacillus rhamnosus GG (LGG)

Most Clinically Studied Probiotic Strain Globally

10–20 billion CFU/day; 5–10 billion CFU/day commonly used in pediatric protocols

Sunfiber® (Partially Hydrolyzed Guar Gum)

IBS Symptom Management (Strongest Evidence Among PHGG)

5-7 g/day for digestive applications; up to 21 g/day in some clinical trials; pediatr

Probiotics (Multi-strain Blends)

Strain-specificity principle in probiotic evidence

1–10 billion CFU/day maintenance; up to 50 billion CFU/day therapeutic

Saccharomyces boulardii

Antibiotic-associated diarrhea prevention

250–500 mg twice daily (5–10 billion CFU/day); 250 mg three times daily for C. diffic

Psyllium Husk (Plantago ovata)

Digestive health and constipation/diarrhea relief

5–15 g/day psyllium husk (1–3 teaspoons); FDA cholesterol claim requires ≥7 g/day; ta

Peppermint (Mentha × piperita)

IBS symptom relief

180–200 mg enteric-coated peppermint oil 3 times daily (540–600 mg/day) for IBS; pepp

Bifidobacterium breve

Gut barrier function and microbiome establishment

INFANT AD (M-16V Morinaga): 1×10⁹ CFU/day × 1 mo. PRETERM (M-16V): 1×10⁹ CFU/day NICU

Bacillus clausii (Enterogermina® / Erceflora)

Acute diarrhea — supports faster recovery in children

Standard dose: 2 billion spores (2×10⁹ CFU) 2-3 times daily as oral suspension. AAD p

Alpha-Galactosidase

Reduced gas, bloating, and abdominal pain from beans, legumes, and cruciferous vegetables

300 or 1,200 GalU with a 420 g cooked-bean meal in healthy volunteers; retail products list 150 to 1,200 GalU per serving.

Bifidobacterium bifidum

Digestive comfort — MIMBb75 studied in IBS with high-quality evidence

IBS (live MIMBb75): 1×10⁹ CFU/day for 4+ weeks; IBS (heat-inactivated MIMBb75 / SYN-H

Gingever® (High-Potency Ginger Extract — OmniActive)

Occasional constipation

280 mg/day Gingever (Eraiah 2024 constipation trial, taken nightly after dinner for 8

Asafin® (Asafoetida Gum for Gut Health — Akay Bioactives)

Microbiome modulation — F/B ratio reduction

Per Akay Asafin product specification

Bifidobacterium animalis subsp. lactis (BB-12 / HN019)

Constipation relief and bowel regularity

1–10 billion CFU/day (BB-12); 17.2 billion CFU/day (HN019 in constipation studies)

Fibalance® (Partially Hydrolyzed Guar Gum)

Low FODMAP Certified — IBS-Friendly Fiber

5-10 g/day; clinical trials commonly 5-6 g/day

Lactobacillus plantarum

IBS symptom relief — particularly bloating and abdominal pain

10–50 billion CFU/day; 299v strain typically 20 billion CFU/day; weight management st

Artichoke Leaf (Cynara scolymus / Cynara cardunculus)

IBS Symptom Relief

320-1,920 mg/day standardized leaf extract; clinical trials commonly use 600-1,800 mg

Escherichia coli Nissle 1917 (Mutaflor®)

Anti-inflammatory gut effects

Ulcerative colitis maintenance: 100 mg twice daily (5×10⁹ CFU/capsule × 2/day) per Mu

Lactobacillus plantarum 299v (Lp299v / LP299V®)

IBS symptom relief — modest

PIVOTAL 10¹⁰ CFU/day (10 billion) Axling 2020 athlete 12 wk + Hoekstra 2021 pregnancy

Improved fat digestion and reduced steatorrhea

Healthy-adult trials used 280 mg acid-resistant lipase before a fatty meal, or three pancrelipase capsules with a meal. Prescription replacement is 10,000 to 80,000 USP lipase units per meal.

Magnesium Citrate

Constipation Relief

200–400 mg elemental magnesium/day for general supplementation; 150–300 mL of 1.745 g

Oliggo-Fiber® Inulin (Chicory Root Fiber — Cargill)

Established Prebiotic Effect

5-10 g/day inulin (typical prebiotic dose; up to 20 g/day with adjustment)

PepZinGI® (Zinc-Carnosine for Gut Lining)

Gut lining repair and leaky gut support

75–150 mg/day PepZinGI® (polaprezinc); 75 mg twice daily for gut lining repair; estab

ResistAid® (Larch Arabinogalactan — Lonza)

Gut Microbiome Modulation

1.5-4.5 g/day ResistAid (research-validated)

Zinc-L-Carnosine (Polaprezinc)

Gut-lining and leaky-gut support

75 mg/day (37.5 mg twice daily) in the NSAID study; 150 mg/day for 4 weeks in the aspirin pilot; 150 or 300 mg/day in the H. pylori trial. Japanese prescription dose 75 mg twice daily.

BarleyTrim® (Barley Beta-Glucan)

Digestive and gut health

About 3 grams of barley beta-glucan per day for cholesterol benefit.

Bioferrin® (Lactoferrin — Glanbia)

100-1000 mg/day lactoferrin (varies by application; immune support typical 100-300 mg

Ginger (Zingiber officinale)

Digestive health and motility

250–2,000 mg/day dried ginger powder or standardized extract; nausea: 1–1.5 g/day; an

Glucomannan (Konjac Root Fiber)

Prebiotic and gut health benefits

About 3 g/day (1 g three times daily before meals) in the cholesterol meta-analysis; always take with a large glass of water.

Limosilactobacillus reuteri DSM 17938 (BioGaia Protectis®)

Adult digestive comfort and bloating

Infants: 100 million CFU (1×10⁸) once daily as drops (BioGaia Protectis® dosing). Chi

Oat Bran (Beta-Glucan)

Prebiotic effects on gut bacteria

FDA HEALTH CLAIM: ≥3 g beta-glucan/day (~75 g raw oat bran, ~140 g cooked oatmeal). W

ButiShield™ (Encapsulated Butyric Acid for Gut)

Microbiome and signaling molecule role

Per Kemin product specification

Improved Digestive Health

2–10 g/day for prebiotic/gut microbiome effects; gradual dose increase recommended to

Bifidobacterium infantis 35624 (Align® / Bifantis® / Meta Align®)

Digestive comfort in women: dose-ranging trial

PIVOTAL: 100 million CFU/day (1×10⁸) — narrow window, both 1 million and 10 billion C

Prebiotic / Gut Microbiome Support

0.14 g FOS/kg/day (roughly 10 g FOS, or 20 to 25 g of syrup for a 70-kg adult) in the single 120-day trial; the higher 0.29 g FOS/kg/day dose caused digestive side effects.

Acacia Fiber (inavea™ Pure Acacia)

Highly tolerable prebiotic fiber

Nearly all the human evidence used 30 g/day of gum arabic powder for 6 weeks to 3 months. Mild gas, bloating and rumbling are reported around 40 g/day.

Bifidobacterium adolescentis

GABA production and gut-brain anxiolytic potential

PRL2019: 20 billion CFU once daily for 12 weeks in a pediatric IBS trial; other strains studied at 1 billion to over 100 billion cells daily.

Bifidobacterium longum

IBS symptom improvement (35624 strain)

1–10 billion CFU/day; 1714 strain studies use 1 billion CFU/day for psychobiotic effe

Digestive Enzyme Blends (DigeZyme® and similar)

Reduced digestive discomfort and bloating

50–150 mg/day DigeZyme® (providing standardized enzyme activity); taken with meals fo

GOS (Galacto-Oligosaccharides)

Constipation Relief (Not Tested In The Studies Cited Here)

Cited studies used 5 g a day (calcium absorption) and 15 g a day (prediabetes); products commonly supply 2.5 to 15 g a day.

Streptococcus thermophilus (Specific Strains)

Lactose digestion improvement

ST81: 3 billion CFU/day. ST36: similar consumer dose. AAD prevention combination with

Trpti™ (Bioavailable OEA for Metabolic/Gut Health)

Intestinal barrier function improvement

300 mg/day (delivering 250 mg OEA) as two 150 mg capsules; a 150 mg/day dose is also described, but only in an unpublished, unverified manufacturer study.

Lactobacillus paracasei (Multi-Strain Specialist)

Probiotics as a class in allergic rhinitis (30-trial meta-analysis)

L. CASEI 431® RESPIRATORY: ≥1×10⁹ CFU/day × 42 days. KW3110 POLLEN ALLERGY: 4×10¹⁰ CF

Actazin® (Kiwifruit Extract — Anagenix)

Digestive regularity

About 600 mg to 2.4 g per day, depending on the goal.

Bacillus subtilis

Bowel regularity and digestive comfort

1–10 billion CFU/day; DE111 commonly dosed at 1 billion CFU/day

Bifidobacterium longum 1714 (Zenflore™ / 1714-Serenitas™)

Gut-brain axis mechanism

Standard dose: 1 billion CFU (1×10⁹) once daily as Zenflore™ or 1714-Serenitas™. Tria

Biotis® GOS (Galacto-Oligosaccharides — FrieslandCampina)

Regularity and stool comfort

Commonly a few grams per day.

DE111® (Bacillus subtilis Probiotic — ADM Deerland)

Digestive regularity

Commonly 1 billion CFU per day.

DPP-IV (Dipeptidyl Peptidase-IV)

Improved digestive comfort in mixed-food sensitivity

500–1,000 DPP-IV units (ALU equivalent) per meal containing potential gluten or casei

EcoGuar® (Partially Hydrolyzed Guar Gum)

Digestive regularity and microbiome

Commonly 5 to 7 grams per day.

iXOS® (Xylooligosaccharides Prebiotic)

Highly selective bifidogenic prebiotic at low dose

1.4 and 2.8 g/day in the bifidobacteria trial, 2 g/day for prediabetes, 4 g/day for type 2 diabetes, 5 g/day and 8 g/day in immune trials; no trial tested the iXOS brand.

LactoSpore® (Heat-Stable Bacillus coagulans Probiotic)

Studied in people with IBS and in adults with gas and bloating

1–4 billion CFU/day LactoSpore® Bacillus coagulans; IBS and gut health: 2 billion CFU

Magnesium Oxide

Constipation/Laxative

400–800 mg magnesium oxide/day for supplementation (delivers ~100–250 mg actually abs

Lactobacillus casei

Diarrhea during antibiotics: research used different strains and is not cited here

The one cited study used a daily fermented milk drink with L. casei Shirota, not a capsule; labels commonly provide about 1 to 10 billion CFU a day. Higher C. difficile doses involve different strains.

Arabinoxylan (Arrabina®)

Selective prebiotic feeding of beneficial bacteria

15 g/day for 6 weeks in the impaired-glucose-tolerance trial; 6 to 12 g with a meal in the acute glucose study; 10 g/day AXOS for 3 weeks in the prebiotic study.

Bovine Collagen

Gut lining: no cited evidence

Cited studies used 2.5 g/day of a branded peptide (VERISOL), about 10 g/day for knee osteoarthritis, and 15 g/day with resistance training; no cited study tested it for tendon or bone.

Brox-25® (Bromelain)

Digestive enzyme support

Commonly 200 to 500 mg (or defined enzyme-activity units) per day.

FenuLife® (Fenugreek Galactomannan — BioActor)

Digestive support

Products typically supply a few grams of fenugreek galactomannan fiber per day with meals. No FenuLife-specific dose-finding trial; the pooled doses were whole-seed preparations.

Fibersol® (Digestion-Resistant Maltodextrin — ADM/Matsutani)

Regularity and gut health

Commonly 5 to 10 grams per day.

Fibruline® (Chicory Inulin — Cosucra)

Prebiotic gut support

Commonly 5 to 15 grams per day.

GingerWarmer® (Ginger Extract)

Digestive support

Commonly around 1 gram of ginger per day.

Ginginoll® (Ginger Extract — Akay)

Digestive support

Commonly around 1 gram of ginger per day.

Gut-barrier support

~10 billion CFU/day

Digestive comfort is not established

Labels commonly list 500 to 1,500 FTU per serving. In absorption studies, 20 to 320 phytase units per 100 g of flour improved iron absorption, with the enzyme mixed into food rather than a capsule.

Prodiet® Lactoferrin (Native Bovine Lactoferrin — Ingredia)

Commonly 100 to 200 mg per day.

SoWell™ (Postbiotic Heat-Killed Lactobacillus)

What has and has not been shown for the gut

10 mg a day of heat-killed L. plantarum L-137 for 12 weeks in the trial; SoWell does not publish a dose that can be matched to that.

Aloe Vera (Aloe barbadensis miller)

Supports digestive comfort

INNER LEAF GEL: 50-300 mL/day juice OR 100-300 mg/day freeze-dried powder (blood suga

Consolax® (Soluble and Insoluble Fiber Blend — Zeus Hygia)

Bowel regularity

Zeus Hygia suggests 1.8 g twice a day, about 3.6 g of fiber daily. No dose of Consolax itself has been tested; the cited studies used more, 5 g twice daily.

Dairylytic® (Lactase Enzyme)

Lactose digestion

Taken with dairy meals; dose measured in enzyme activity units (FCC).

Clostridium butyricum MIYAIRI 588 (CBM588 / MIYA-BM® / Butirrisan®)

Butyrate production in the gut

20-80 mg/day MIYA-BM powder (1-4×10⁸ CFU) is the range cited for the Japanese prescription product. No adult dose is established here: the diarrhea study was in children and the cancer trials were supervised.

IBS symptom improvement

IBS (enteric-coated peppermint oil): 180-225 mg three times daily; menthol is only one component of peppermint oil, and no cited trial tested isolated menthol.

Akkermansia muciniphila

Gut barrier integrity

Depommier 2019: 10¹⁰ CFU/day pasteurized × 3 months. Most products: 10⁸-10⁹ CFU/day.

Bovine Colostrum

Exercise-induced gut permeability

10-20 g/day for 8-12 weeks in most human trials; a smaller set of trials used 0.5-1.0

Enterococcus faecium SF68® (Bioflorin / Cernivet)

Studied in 1,143 people with acute infectious diarrhea

Three times daily for 7 days in acute diarrhea, twice daily for 7 days with antibiotics; the live bacteria count is not stated and no dose is tested for general use.

IBS-D and post-infectious IBS — strongest gut evidence

Gut barrier: 15 g/day (3x5g); permeability studies used more than 30 g/day for under 2 weeks.

Lactobacillus acidophilus

IBS: no change in abdominal pain, small change in flatus

1–10 billion CFU/day for general use; up to 50 billion CFU/day in IBS or vaginal heal

Optibiome® BS50 (Bacillus subtilis MB40 — BIO-CAT Microbials)

Decreased gastrointestinal symptoms in healthy adults

Per BIO-CAT Optibiome BS50 product specification

Aminogen® (Protease Enzyme Blend — Deerland)

Improved protein digestion

Labels typically provide 250 to 500 mg with a protein meal; trials used 2.5 g or 5 g of the enzyme blend, and no published trial has tested whether 250 to 500 mg works.

Beef Pancreas (Desiccated)

Natural digestive enzyme content

Typical supplementation: 1.5-3 g/day (2-4 capsules at 750 mg each) desiccated beef pa

Reduced bloating and gas from raw vegetables and high-fiber foods

300–1,500 CU per meal; typical multi-enzyme blends contain 500–2,000 CU per dose

Faecalibacterium prausnitzii (Next-Generation Probiotic)

Gut barrier strengthening

Clinical trial doses: typically 1-10 billion CFU/day in oxygen-protected formulations

Fibregum™ (Prebiotic Acacia Gum)

Generally Good Digestive Tolerance

Trials used 5, 10, 20, 30 and 40 g/day; about 10 g/day was optimal in the one dose-response study. 30-40 g/day has caused GI symptoms.

Hemicellulase (Plant Fiber Digestive Enzyme)

Plant fiber digestion in multi-enzyme blends

No studied dose; labels list about 200 to 2,000 HCU per serving. Health Canada caps it at 45,000 FCC HCU per day.

inavea™ BAOBAB ACACIA

Prebiotic Activity in a Laboratory Gut Model

5 g/day (synergistic dose; lower than individual ingredients alone)

inavea™ CAROB ACACIA

Microbiota Diversity Enhancement

5 g/day (research-validated for microbiome diversity effects)

Kwd+® (Kiwi Extract for Healthy Digestion)

Protein digestion enhancement via actinidin

Supplier-suggested 300 mg a day, or 600 mg before a large meal; no published trial has tested either dose, and the cited studies used whole kiwifruit, not this extract.

MicrobiomeX® (Citrus Flavonoid Extract — BioActor)

Shifts gut fatty acids toward butyrate

500 mg/day (studied 250-500 mg)

Tributyrin (CoreBiome® Butyrate Prodrug)

Colonic butyrate delivery vs free butyrate (laboratory gut simulator, not people)

300 to 1,000 mg/day with meals is the CoreBiome label range; no dose of CoreBiome has been tested for benefit in people.

ColostrumOne™ (Bovine Colostrum — PanTheryx)

Intestinal barrier support, from colostrum as a class

500 mg to 1 g per serving

Activated Charcoal

Intestinal gas reduction (modest evidence)

ACUTE POISONING (medical, supervised): 50-100 g (1-2 g/kg) within 1 hr. MDAC: 25-50 g

Digestive comfort and transit

250 mg twice daily

BeneGut® (Perilla Extract — Vital Solutions)

Digestive comfort

Around 150 to 300 mg of extract per day.

Betaine HCl / Pepsin

Improved protein digestion and amino acid absorption

Highly variable, typically 1–3 capsules with high-protein meals; clinical 'titration'

FiberSMART® (Soluble Tapioca Fiber — Anderson)

Fiber and digestive support

The one supporting human study used 6 g a day of maize soluble fiber; finished products list servings as several grams of fiber, which may be more or less than the amount studied.

GlucoVantage® (Dihydroberberine)

Gut microbiome support

100–200 mg/day before meals; the only human study gave single 100 mg or 200 mg doses, so no trial has established an effective daily dose.

KiOtransine® (Chitin-Glucan Prebiotic Fiber — KitoZyme)

Gut microbiome support

Commonly a few grams per day.

Lactobacillus salivarius (Multi-Strain)

Ls-33 obesity / gut barrier

Oral health (WB21): 2.0×10⁹ CFU/day; periodontal (CP3365): three tablets a day, 4.4 billion cells each, heat-killed. Match strain to indication.

LBiome™ (Lactobacillus LB Postbiotic — Stratum Nutrition)

Microbiome Modulation

No adult dose is established by the studies cited here; the published trials used the heat-killed preparation in children during an acute illness.

Prebiotic gut-microbiome support

300 mg once a day; the single randomized trial used 300 mg a day for 8 weeks, and nothing is known about other doses or longer use.

GluteAX® (Gluten-Targeting Enzyme — BIO-CAT)

Alpha-gliadin 33-mer peptide digestion

Per BIO-CAT GluteAX product specification

Turkey Tail Mushroom

Gut microbiome support

1–3 g/day PSK extract; 2–9 g/day whole mushroom powder

VitaFiber® (Isomalto-Oligosaccharide — BioNeutra)

Prebiotic fiber

Used as a fiber and sweetener; a few grams per serving.

Baobab Fruit Powder (Adansonia digitata)

Prebiotic Fiber: A Mechanism, Not a Tested Result

Commonly used at 5 to 15 g/day of baobab fruit powder, but the human studies did not test a daily powder dose; they used 18.5 to 37 g of concentrated aqueous extract or a single 250 mL drink.

EpiCor® (Postbiotic Yeast Fermentate — Cargill)

Constipation and GI discomfort reduction

500 mg/day EpiCor (research-validated)

FenuFibers® (Fenugreek Fiber)

Digestive support

Commonly a few grams of fenugreek fiber per day with meals.

Fenumannan® (Fenugreek Galactomannan Fiber)

Digestive effects

An acute satiety trial used 4 g and 8 g of isolated fenugreek fiber, with 8 g working better; fenugreek gum glucose trials used about 6 to 16 g.

Gastrap® (Chitin-Glucan for Gas and Bloating — KitoZyme)

Gas and bloating relief

Per the product specification.

Prodiet® Colostrum (Bovine Colostrum — Ingredia)

Trials used 20 g/day, 25 g/day, or 3.2 g/day of colostrum powder. Ingredia's suggested minimum, about 0.4 to 0.5 g of powder a day, is far below the amounts used in those trials.

Progestive® (Bacillus coagulans Probiotic — Nutraceuticals International Group)

Digestive support

Commonly billions of CFU per day.

Protease (Proteolytic Enzymes)

Improved protein digestion in high-protein meals

Digestive: 30,000–60,000 HUT with meals; Systemic anti-inflammatory: Wobenzym® 3 tabl

SynBalance® (Probiotic Strains — ROELMI)

Commonly billions of CFU per day, depending on the strain.

Lactobacillus reuteri

Functional constipation in children

10^8 CFU/day (DSM 17938 for infant colic); 2.9×10^9 CFU/day (NCIMB 30242 for choleste

Bacillus licheniformis (Standalone Probiotic)

CDI gut microbiota preservation

Roughly 2-5 x 10^8 CFU per day (hundreds of millions, not billions) of the CMCC63516 strain; the single cited study was in children, so this is not an established adult dose.

Colonic microbiome modulation (clinical evidence)

Traditional/clinical doses: 100-500 mg/day humic acid extract. No FDA-recognized stan

Oregano Oil (Origanum vulgare)

Possible Gut Health Support

600 mg/day emulsified oregano oil for enteric parasites; consumer softgels 100-300 mg/day; no dose has been established, and no study has tested dosing beyond six weeks.

Fructan Hydrolase (FODMAP-Targeted)

Breaks down fructans in laboratory digestion models

FODZYME®-style products: 1 sprinkle per serving with FODMAP-containing meals (label-directed use); no dose has been established in a human trial.

NatureKnit® (whole-food fruit & vegetable prebiotic fiber — FutureCeuticals)

Supports a gentle, sustained prebiotic effect

In vitro M-SHIME at ~3.3 g/L product (1.67 g fiber/L); ~2 g typical serving

500 to 1,500 mg per day, split into 2 or 3 doses with meals. Long-term safety at these doses has not been established.

effera® (Human-Identical Lactoferrin)

Gut bacteria: one 12-person pilot

No established effera® dose; the cited human trials used bovine lactoferrin at 200 to 600 mg a day, not effera® itself.

AstraGin® (Astragalus and Notoginseng Saponin Extract)

Gut barrier and microbiome: one 8 person pilot in ulcerative colitis

50 mg twice daily (100 mg/day) in both supplementation trials; the two acute absorption tests gave 50 mg the night before and 50 mg with the test drink.

10-20 g/day for 8-12 weeks in most human trials; a smaller set of trials used 0.5-1.0

IBS Symptom Management (Combination Formula Evidence)

No trial has tested slippery elm alone; traditional oral use is 2 to 4 g powdered inner bark in water 3 to 4 times daily, or 400 to 500 mg capsules 3 times daily.

Sterculia (Karaya Gum)

Stool Bulking After Bowel Surgery

ADULT STANDARD: 7-14 g/day (1-2 sachets granules) once or BID with ≥250 mL water. Sri

DigeSEB® (Digestive Enzyme Blend — Deerland)

Complete-meal digestion

Taken with meals as directed, typically one serving per meal.

Glucoamylase (Amyloglucosidase / γ-Amylase)

CSID starch digestion

No human trial has established a dose; digestive blends usually declare glucoamylase in activity units (AGU) and take it with meals.

Morinaga BB536 (Bifidobacterium longum BB536)

Gut bacteria measures: no change found

46 billion CFU per day for 4 weeks in the single cited trial, which did not show a significant benefit over placebo. Typical labels list 1 to 5 billion CFU per day, far below the amount tested.

Optiziome® Fructanase® (Fructan-Digesting Enzyme — BIO-CAT)

FODMAP digestive support (fructan-specific)

Per BIO-CAT Fructanase product specification

Cinaran® (Artichoke Leaf Extract)

Digestive comfort

Commonly 600 mg to 1.8 g of extract per day.

Fennel (Foeniculum vulgare)

Bloating and indigestion — traditional carminative

RAHIMIKIAN 2017 menopause: 100 mg fennel oil soft caps BID = 200 mg/day × 8 wk. SEED

ActivAloe® (Standardized Aloe Vera — Aloecorp)

Digestive comfort

Per the product specification.

Terminalia Chebula (Rejuna®)

Traditional digestive use, not yet tested in controlled trials

500–1,000 mg/day of standardized aqueous fruit extract, given as 250–500 mg twice daily, the range used in the human trials. Traditional whole-fruit powder use is higher, around 3–5 g/day.

Wormwood (Artemisia absinthium)

Digestive/Appetite Stimulation (Traditional Use)

OMER 2007 Crohn's herbal blend: 3 × 500 mg/day × 10 wk. Krebs 2010: SedaCrohn® × 6 wk

BiAloe® (Aloe Vera Polysaccharides)

Digestive support

Commonly a few hundred milligrams per day, near the 500 mg per day of a different aloe inner-leaf extract used in the irritable bowel studies.

Bio-Zyme® (Digestive Enzyme Complex)

Digestive support

Taken with meals; dose varies by product. No dose of this blend has been tested in a published clinical trial. Enzyme units differ between brands, so milligram amounts are not comparable.

Biootic® (Probiotic Cultures)

Digestive support

Commonly billions of CFU per day, depending on the strain.

Brewster Probiotics™ (Probiotic Cultures)

Digestive support

Varies by strain and product; commonly billions of CFU per day.

Champex® (Champignon Mushroom Extract — Agaricus bisporus)

Gut environment support

Commonly around 200 to 400 mg per day.

Digesten® (Digestive Enzyme Blend)

Digestive support

Taken with meals; dose varies by product and no dose of this blend has been studied. The cited trials used prescription-strength pancrelipase far beyond what a consumer enzyme capsule provides.

Gevalin® (Bael Fruit for Digestive Health — Zeus Hygia)

Digestive support

Around 250 mg per day.

Pancrelipase / Pancreatin

Pancreatic exocrine insufficiency (PEI) treatment

OTC pancreatin capsules are labelled at roughly 5,000 to 10,000 USP lipase units each; trials used prescription dosing of 25,000 to 80,000 lipase units per meal under medical supervision.

FOS (Fructo-Oligosaccharides)

Selective Bifidobacterium Stimulation (Bifidogenic Effect)

5-15 g/day; gradual introduction (start 2-3 g/day, titrate to tolerance) due to GI fe

Lactase (β-Galactosidase)

Lactose intolerance symptom relief

About 3,000 or 6,000 units taken with milk containing 20 g lactose; the EU claim requires at least 4,500 FCC units with each lactose-containing meal.

Resistant Starch

Reduced fasting insulin and HOMA-IR

GUT/MICROBIOME: 15-30 g/day (1-2 tbsp Hi-Maize® or raw potato starch). T2D METABOLIC:

Limonene (D-Limonene)

GERD/heartburn symptom relief (open trials)

About 10 mg/kg/day (roughly 700 mg for a 70 kg adult) in the inflammation trial; 2 g/day in the breast tissue study; the 1,000 mg heartburn doses come from unpublished patent studies.

Tolerase® G (AN-PEP Gluten-Digesting Enzyme — DSM)

Breaks down gluten in the stomach

With gluten-containing meals

Gastro-AD® (Fermented Soy Postbiotic — Lallemand)

Stomach comfort

Per the product specification.

GutGard® (Deglycyrrhizinated Licorice — Natural Remedies)

Reflux and indigestion

Around 150 mg per day.

Lactobacillus gasseri

Abdominal fat: one trial, one strain, in fermented milk

The one cited trial used strain SBT2055 delivered daily in fermented milk, not a capsule; there is no established consumer dose for L. gasseri.

Lactobacillus helveticus R0052 + Bifidobacterium longum R0175 (Probio'Stick® / Cerebiome®)

Overall distress and cortisol in healthy volunteers (one trial)

3 billion CFU per sachet daily for 30 days (Probio'Stick® / Cerebiome®). Longer proto

Lactobacillus johnsonii La1 (NCC533 / CNCM I-1225)

Cell-free La1 liquid partly lowered H. pylori in 20 adults

The 1999 study tested a cell-free liquid from La1 cultures, roughly 10^9 CFU per mL of starting culture, with no live bacteria. Other work used about 10^10 CFU a day; doses were not consistent.

LuraLean® (Glucomannan Fiber Blend — AHD International)

Small average weight difference in konjac fiber trials

Per LuraLean product specification (typical 2-4 g/day)

MucoSave® FG (Prickly Pear and Olive Extract — Bionap)

Studied in people with reflux symptoms

6 grams per day of a blend in the one trial; the roughly 200 mg per day figure often quoted is far below the amount actually studied.

Myrrh (Commiphora molmol)

Anti-inflammatory Activity (Mechanistic / Preclinical)

Supplement 250-500 mg extract 2-3x/day with food; no antiparasitic dose is listed, and a suspected parasitic infection needs diagnosis and prescription treatment from a doctor.

Optiziome® P3 Hydrolyzer® (Protease Blend — BIO-CAT)

14% higher EAA, 15% higher BCAA with whey protein

Per BIO-CAT P3 Hydrolyzer product specification

Salba® / Premium Chia (Salvia hispanica — AHD International)

Highest Plant Omega-3 ALA Content

1-2 tablespoons (10-25 g) chia seeds daily

Prescription enzyme therapy in people with pancreatic insufficiency (not a supplement…

No cited trial establishes a dose of supplemental amylase for healthy people. Blend labels commonly list 5,000 to 25,000 DU per meal, a typical label amount rather than a tested dose.

BioEcolians® (Alpha-Glucan Oligosaccharide — Solabia)

Fermented by bifidobacteria in laboratory cultures

8 g/day for eight weeks in the only human study, taken alongside a probiotic; no dose has been shown to work when taken on its own.