Top 5 — Ranked by Evidence
Strong
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
Very Strong
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
Moderate
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)
Strong
Probiotics (Multi-strain Blends)
Strain-specificity principle in probiotic evidence
1–10 billion CFU/day maintenance; up to 50 billion CFU/day therapeutic
Strong
Saccharomyces boulardii
Antibiotic-associated diarrhea prevention
250–500 mg twice daily (5–10 billion CFU/day); 250 mg three times daily for C. diffic
📈 Fastest Growing Gut Health Ingredients
Postbiotic, fiber, and strain-specific ingredients gaining traction with formulators in 2024–2026.
Trending
Very Strong
Sunfiber® (Partially Hydrolyzed Guar Gum)
IBS Symptom Management (Strongest Evidence Among PHGG)
5-7 g/day digestive; up to 21 g/day in some trials; pediatric 3-5 g/day.
Trending
Limited
EpiCor® (Postbiotic Yeast Fermentate — Cargill)
Constipation and GI discomfort reduction
500 mg/day.
Trending
Strong
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.
Watch
Limited
Akkermansia muciniphila
Gut barrier integrity
10^10 cells/day of the pasteurized form was the amount used in the single human trial. Many…
Watch
Limited
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: 4 weeks with whey protein in…
Watch
Moderate
Arabinoxylan (Arrabina®)
Selective prebiotic feeding of beneficial bacteria
4–15 g/day; blood sugar management: 8–15 g/day with meals; immune studies: 4–10 g/day; effects…
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 IBS-style cramping & bloating
Amazon →
IBgard Enteric-Coated Peppermint Oil
Enteric-coated peppermint oil — SST technology
Ultra-purified peppermint oil with patented Site-Specific Targeting (SST) technology that releases the oil in the small intestine where it's needed — not the stomach. #1 gastroenterologist-recommended peppermint oil brand. Strong clinical evidence for IBS-related bloating, cramping, and gas.
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 (161)
Strong
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
Very Strong
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
Moderate
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)
Strong
Probiotics (Multi-strain Blends)
Strain-specificity principle in probiotic evidence
1–10 billion CFU/day maintenance; up to 50 billion CFU/day therapeutic
Strong
Saccharomyces boulardii
Antibiotic-associated diarrhea prevention
250–500 mg twice daily (5–10 billion CFU/day); 250 mg three times daily for C. diffic
Very Strong
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
Strong
Peppermint (Mentha × piperita)
IBS symptom relief
180–200 mg enteric-coated peppermint oil 3 times daily (540–600 mg/day) for IBS; pepp
Strong
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
Moderate
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
Moderate
Lactobacillus acidophilus
IBS symptom improvement (modest effect)
1–10 billion CFU/day for general use; up to 50 billion CFU/day in IBS or vaginal heal
Strong
Alpha-Galactosidase
Reduced gas, bloating, and abdominal pain from beans, legumes, and cruciferous vegetables
150-1200 GalU/serving. GAS REDUCTION: 300 or 1200 GalU with high-GOS meals. GOS-SENSI
Strong
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
Strong
Gingever® (High-Potency Ginger Extract — OmniActive)
Occasional constipation
280 mg/day Gingever (Eraiah 2024 constipation trial, taken nightly after dinner for 8
Moderate
Asafin® (Asafoetida Gum for Gut Health — Akay Bioactives)
Microbiome modulation — F/B ratio reduction
Per Akay Asafin product specification
Moderate
Fibalance® (Partially Hydrolyzed Guar Gum)
Low FODMAP Certified — IBS-Friendly Fiber
5-10 g/day; clinical trials commonly 5-6 g/day
Moderate
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
Strong
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
Strong
Escherichia coli Nissle 1917 (Mutaflor®)
Anti-inflammatory gut effects
Ulcerative colitis maintenance: 100 mg twice daily (5×10⁹ CFU/capsule × 2/day) per Mu
Strong
Lactobacillus plantarum 299v (Lp299v / LP299V®)
IBS symptom relief — modest
PIVOTAL 10¹⁰ CFU/day (10 billion) Axling 2020 athlete 12 wk + Hoekstra 2021 pregnancy
Strong
Lipase
Improved fat digestion and reduced steatorrhea
OTC supplements: 1,000–10,000 USP lipase units per meal; Prescription PERT for pancre
Strong
Magnesium Citrate
Constipation Relief
200–400 mg elemental magnesium/day for general supplementation; 150–300 mL of 1.745 g
Strong
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)
Strong
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
Strong
ResistAid® (Larch Arabinogalactan — Lonza)
Gut Microbiome Modulation
1.5-4.5 g/day ResistAid (research-validated)
Strong
Zinc-L-Carnosine (Polaprezinc)
Gut-lining and leaky-gut support
75-150 mg/day with food
Strong
BarleyTrim® (Barley Beta-Glucan)
Digestive and gut health
About 3 grams of barley beta-glucan per day for cholesterol benefit.
Strong
Beta-Glucans (Oat & Yeast-Derived)
Gut microbiome and prebiotic activity
Cholesterol (FDA claim): 3 g/day oat β-glucan. Immune (Wellmune®): 250-500 mg/day yea
Strong
Bioferrin® (Lactoferrin — Glanbia)
Gut Health
100-1000 mg/day lactoferrin (varies by application; immune support typical 100-300 mg
Strong
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
Strong
Glucomannan (Konjac Root Fiber)
Prebiotic and gut health benefits
3–4 g/day before meals (1 g three times daily, 30 minutes before meals with 250 mL wa
Strong
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
Strong
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
Moderate
ButiShield™ (Encapsulated Butyric Acid for Gut)
Microbiome and signaling molecule role
Per Kemin product specification
Moderate
Inulin
Improved Digestive Health
2–10 g/day for prebiotic/gut microbiome effects; gradual dose increase recommended to
Limited
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
Limited
Yacon Syrup
Prebiotic / Gut Microbiome Support
PIVOTAL: 0.14 g FOS/kg/day × 120 d (~10 g FOS = 20-25 g syrup for 70-kg adult). TOXIC
Moderate
Acacia Fiber (inavea™ Pure Acacia)
Highly tolerable prebiotic fiber
RANGE: 5-30 g/day. PREBIOTIC (bifidogenic): ~10 g/day onset. SATIETY/METABOLIC: 15-30
Moderate
Bifidobacterium adolescentis
GABA production and gut-brain anxiolytic potential
SLEEP (SBT2786): 1×10⁹ to 1×10¹⁰ CFU/day × 4+ wk. MOOD/STRESS (PRL2019): 1×10⁹ CFU/da
Moderate
Bifidobacterium longum
IBS symptom improvement (35624 strain)
1–10 billion CFU/day; 1714 strain studies use 1 billion CFU/day for psychobiotic effe
Moderate
Digestive Enzyme Blends (DigeZyme® and similar)
Reduced digestive discomfort and bloating
50–150 mg/day DigeZyme® (providing standardized enzyme activity); taken with meals fo
Moderate
GOS (Galacto-Oligosaccharides)
Constipation Relief (Not Tested In The Studies Cited Here)
2.5-15 g/day; clinical research often 5-10 g/day; infant formula fortification 0.4-0.
Moderate
Streptococcus thermophilus (Specific Strains)
Lactose digestion improvement
ST81: 3 billion CFU/day. ST36: similar consumer dose. AAD prevention combination with
Moderate
Trpti™ (Bioavailable OEA for Metabolic/Gut Health)
Intestinal barrier function improvement
Per Saanroo product specification
Limited
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
Moderate
Actazin® (Kiwifruit Extract — Anagenix)
Digestive regularity
About 600 mg to 2.4 g per day, depending on the goal.
Moderate
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
Moderate
Bacillus subtilis
Bowel regularity and digestive comfort
1–10 billion CFU/day; DE111 commonly dosed at 1 billion CFU/day
Moderate
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
Moderate
Biotis® GOS (Galacto-Oligosaccharides — FrieslandCampina)
Regularity and stool comfort
Commonly a few grams per day.
Moderate
DE111® (Bacillus subtilis Probiotic — ADM Deerland)
Digestive regularity
Commonly 1 billion CFU per day.
Moderate
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
Moderate
EcoGuar® (Partially Hydrolyzed Guar Gum)
Digestive regularity and microbiome
Commonly 5 to 7 grams per day.
Moderate
iXOS® (Xylooligosaccharides Prebiotic)
Highly selective bifidogenic prebiotic at low dose
1–2g/day iXOS® for prebiotic bifidogenic effects (much lower than other prebiotics at
Moderate
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
Moderate
Magnesium Oxide
Constipation/Laxative
400–800 mg magnesium oxide/day for supplementation (delivers ~100–250 mg actually abs
Limited
Lactobacillus casei
Diarrhea during antibiotics: research used different strains and is not cited here
10^9–10^10 CFU/day (Yakult provides 10^10 CFU/65mL bottle); 10–100 billion CFU/day in
Moderate
Arabinoxylan (Arrabina®)
Selective prebiotic feeding of beneficial bacteria
4–15 g/day; blood sugar management: 8–15 g/day with meals; immune studies: 4–10 g/day
Moderate
Benexia® (Chia Seed — Salvia hispanica)
Digestive and fullness support
Commonly 15 to 25 grams of chia per day.
Moderate
Bovine Collagen
Gut lining: no cited evidence
Skin and joints: 2.5-10 g/day. Tendon support: 15 g/day with vitamin C, 30-60 minutes
Moderate
Brox-25® (Bromelain)
Digestive enzyme support
Commonly 200 to 500 mg (or defined enzyme-activity units) per day.
Moderate
FenuLife® (Fenugreek Galactomannan — BioActor)
Digestive support
Commonly a few grams of fenugreek fiber per day with meals.
Moderate
Fibersol® (Digestion-Resistant Maltodextrin — ADM/Matsutani)
Regularity and gut health
Commonly 5 to 10 grams per day.
Moderate
Fibruline® (Chicory Inulin — Cosucra)
Prebiotic gut support
Commonly 5 to 15 grams per day.
Moderate
GingerWarmer® (Ginger Extract)
Digestive support
Commonly around 1 gram of ginger per day.
Moderate
Ginginoll® (Ginger Extract — Akay)
Digestive support
Commonly around 1 gram of ginger per day.
Moderate
NūGensia™
Gut-barrier support
~10 billion CFU/day
Moderate
Phytase
Digestive comfort is not established
500–2,000 FTU per high-phytate meal; typical multi-enzyme blends contain 500–1,500 FT
Moderate
Prodiet® Lactoferrin (Native Bovine Lactoferrin — Ingredia)
Gut health
Commonly 100 to 200 mg per day.
Moderate
SoWell™ (Postbiotic Heat-Killed Lactobacillus)
What has and has not been shown for the gut
Per SoWell™ product specifications; typical postbiotic dose 10–100 billion CFU equiva
Limited
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
Limited
Consolax® (Soluble and Insoluble Fiber Blend — Zeus Hygia)
Bowel regularity
Commonly several grams of fiber per serving.
Limited
Dairylytic® (Lactase Enzyme)
Lactose digestion
Taken with dairy meals; dose measured in enzyme activity units (FCC).
Limited
Clostridium butyricum MIYAIRI 588 (CBM588 / MIYA-BM® / Butirrisan®)
Butyrate production in the gut
Standard dose: 20-80 mg/day of MIYA-BM® powder providing 1-4×10⁸ CFU. Adult AAD preve
Strong
Menthol
IBS symptom improvement
IBS (enteric-coated peppermint oil): 180-225 mg L-menthol equivalent 3×/day (IBgard®)
Limited
Akkermansia muciniphila
Gut barrier integrity
Depommier 2019: 10¹⁰ CFU/day pasteurized × 3 months. Most products: 10⁸-10⁹ CFU/day.
Limited
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
Limited
Enterococcus faecium SF68® (Bioflorin / Cernivet)
Studied in 1,143 people with acute infectious diarrhea
GREUTER 2020 ACUTE DIARRHEA: SF68 three times daily × 7 days (n=1,143 RCT). AAD PREVE
Limited
L-Glutamine
IBS-D and post-infectious IBS — strongest gut evidence
Gut barrier: 15 g/day (3x5g). Permeability (2024 meta): >30 g/day, <2 weeks. Sickle c
Limited
Optibiome® BS50 (Bacillus subtilis MB40 — BIO-CAT Microbials)
Decreased gastrointestinal symptoms in healthy adults
Per BIO-CAT Optibiome BS50 product specification
Limited
Aminogen® (Protease Enzyme Blend — Deerland)
Improved protein digestion
Roughly 250 to 500 mg taken with a protein-containing meal or shake.
Limited
Beef Pancreas (Desiccated)
Natural digestive enzyme content
Typical supplementation: 1.5-3 g/day (2-4 capsules at 750 mg each) desiccated beef pa
Limited
Cellulase
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
Limited
Faecalibacterium prausnitzii (Next-Generation Probiotic)
Gut barrier strengthening
Clinical trial doses: typically 1-10 billion CFU/day in oxygen-protected formulations
Limited
Fibregum™ (Prebiotic Acacia Gum)
Generally Good Digestive Tolerance
5-15 g/day; clinical research often 10 g/day; up to 30+ g/day well-tolerated
Limited
Hemicellulase (Plant Fiber Digestive Enzyme)
Plant fiber digestion in multi-enzyme blends
TYPICAL CAPSULE: 2,000-6,400 HCU (Hemicellulase Units) per serving in multi-enzyme bl
Limited
inavea™ BAOBAB ACACIA
Prebiotic Activity in a Laboratory Gut Model
5 g/day (synergistic dose; lower than individual ingredients alone)
Limited
inavea™ CAROB ACACIA
Microbiota Diversity Enhancement
5 g/day (research-validated for microbiome diversity effects)
Limited
Kwd+® (Kiwi Extract for Healthy Digestion)
Protein digestion enhancement via actinidin
Per Pharmactive product specification
Limited
MicrobiomeX® (Citrus Flavonoid Extract — BioActor)
Shifts gut fatty acids toward butyrate
500 mg/day (studied 250-500 mg)
Preliminary
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
Limited
Tributyrin (CoreBiome® Butyrate Prodrug)
Colonic butyrate delivery vs free butyrate (laboratory gut simulator, not people)
SHIME® IN VITRO: 300 mg cap + 450 mg softgel. FSU CrossOver: 300 mg/day × 4 wk (TERMI
Preliminary
ColostrumOne™ (Bovine Colostrum — PanTheryx)
Intestinal barrier support, from colostrum as a class
500 mg to 1 g per serving
Limited
Asdamarin™
Digestive comfort and transit
250 mg twice daily
Limited
BeneGut® (Perilla Extract — Vital Solutions)
Digestive comfort
Around 150 to 300 mg of extract per day.
Limited
Betaine HCl / Pepsin
Improved protein digestion and amino acid absorption
Highly variable, typically 1–3 capsules with high-protein meals; clinical 'titration'
Limited
FiberSMART® (Soluble Tapioca Fiber — Anderson)
Fiber and digestive support
Commonly several grams of fiber per serving.
Limited
GlucoVantage® (Dihydroberberine)
Gut microbiome support
100–200 mg/day (equivalent to 500–1,000 mg standard berberine); taken before meals
Limited
Lactobacillus salivarius (Multi-Strain)
Ls-33 obesity / gut barrier
ORAL HEALTH (WB21): 2.0×10⁹ CFU/day × 2 weeks (caries). PERIODONTAL (heat-killed CP33
Limited
LBiome™ (Lactobacillus LB Postbiotic — Stratum Nutrition)
Microbiome Modulation
Per Stratum Nutrition LBiome product specification
Limited
Odilia™
Prebiotic gut-microbiome support
~300 mg/day
Limited
GluteAX® (Gluten-Targeting Enzyme — BIO-CAT)
Alpha-gliadin 33-mer peptide digestion
Per BIO-CAT GluteAX product specification
Limited
Turkey Tail Mushroom
Gut microbiome support
1–3 g/day PSK extract; 2–9 g/day whole mushroom powder
Limited
VitaFiber® (Isomalto-Oligosaccharide — BioNeutra)
Prebiotic fiber
Used as a fiber and sweetener; a few grams per serving.
Limited
Baobab Fruit Powder (Adansonia digitata)
Prebiotic Fiber: A Mechanism, Not a Tested Result
5-15 g/day baobab fruit powder; provides ~2-7 g soluble fiber per 10 g serving
Limited
EpiCor® (Postbiotic Yeast Fermentate — Cargill)
Constipation and GI discomfort reduction
500 mg/day EpiCor (research-validated)
Limited
FenuFibers® (Fenugreek Fiber)
Digestive support
Commonly a few grams of fenugreek fiber per day with meals.
Limited
Fenumannan® (Fenugreek Galactomannan Fiber)
Digestive effects
Commonly a few grams of fenugreek fiber per day with meals.
Limited
Gastrap® (Chitin-Glucan for Gas and Bloating — KitoZyme)
Gas and bloating relief
Per the product specification.
Limited
KiOtransine® (Chitin-Glucan Prebiotic Fiber — KitoZyme)
Gut microbiome support
Commonly a few grams per day.
Limited
Prodiet® Colostrum (Bovine Colostrum — Ingredia)
Gut health
Commonly a few grams of colostrum per day.
Limited
Progestive® (Bacillus coagulans Probiotic — Nutraceuticals International Group)
Digestive support
Commonly billions of CFU per day.
Limited
Protease (Proteolytic Enzymes)
Improved protein digestion in high-protein meals
Digestive: 30,000–60,000 HUT with meals; Systemic anti-inflammatory: Wobenzym® 3 tabl
Limited
SynBalance® (Probiotic Strains — ROELMI)
Gut health
Commonly billions of CFU per day, depending on the strain.
Moderate
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
Preliminary
Bacillus licheniformis (Standalone Probiotic)
CDI gut microbiota preservation
ZHOU 2023 PEDIATRIC AAD: B. licheniformis CMCC63516 ~2-5×10⁸ CFU/day. Spore-forming —
Limited
Humic Extract
Colonic microbiome modulation (clinical evidence)
Traditional/clinical doses: 100-500 mg/day humic acid extract. No FDA-recognized stan
Limited
Oregano Oil (Origanum vulgare)
Possible Gut Health Support
FORCE 2000 ENTERIC PARASITES: 600 mg emulsified oregano oil daily × 6 wk. CONSUMER: 1
Preliminary
Fructan Hydrolase (FODMAP-Targeted)
Breaks down fructans in laboratory digestion models
FODZYME®-style products: 1 sprinkle/serving with FODMAP-containing meals
Moderate
Berberine
Gut Health
500–1,500 mg per day, often divided into 2–3 doses taken with meals to improve absorp
Moderate
effera® (Human-Identical Lactoferrin)
Gut bacteria: one 12-person pilot
Per effera® product specifications; Helaina clinical dosing; typical lactoferrin dose
Limited
AstraGin® (Astragalus and Notoginseng Saponin Extract)
Gut barrier and microbiome: one 8 person pilot in ulcerative colitis
25–50 mg/day as absorption enhancer (co-ingredient); 100 mg/day for gut health applic
Limited
Colostrum
Gut Health
10-20 g/day for 8-12 weeks in most human trials; a smaller set of trials used 0.5-1.0
Limited
Slippery Elm
IBS Symptom Management (Combination Formula Evidence)
STANDALONE: 2-4 g powdered inner bark in water 3-4×/day OR 400-500 mg caps 3×/day. LO
Limited
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
Preliminary
DigeSEB® (Digestive Enzyme Blend — Deerland)
Complete-meal digestion
Taken with meals as directed, typically one serving per meal.
Preliminary
Glucoamylase (Amyloglucosidase / γ-Amylase)
CSID starch digestion
DIGESTIVE BLEND: 25-100 mg/dose with meals as multi-enzyme component. Aspergillus nig
Preliminary
Morinaga BB536 (Bifidobacterium longum BB536)
Gut bacteria measures: no change found
Often 1 to 5 billion CFU or more per day.
Preliminary
Optiziome® Fructanase® (Fructan-Digesting Enzyme — BIO-CAT)
FODMAP digestive support (fructan-specific)
Per BIO-CAT Fructanase product specification
Moderate
Cinaran® (Artichoke Leaf Extract)
Digestive comfort
Commonly 600 mg to 1.8 g of extract per day.
Moderate
Fennel (Foeniculum vulgare)
Bloating and indigestion — traditional carminative
RAHIMIKIAN 2017 menopause: 100 mg fennel oil soft caps BID = 200 mg/day × 8 wk. SEED
Limited
ActivAloe® (Standardized Aloe Vera — Aloecorp)
Digestive comfort
Per the product specification.
Limited
Terminalia Chebula (Rejuna®)
Traditional digestive use, not yet tested in controlled trials
500–1,000 mg/day standardized extract; Rejuna® clinical dose: 500 mg/day; traditional
Limited
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
Preliminary
BiAloe® (Aloe Vera Polysaccharides)
Digestive support
Commonly a few hundred milligrams per day.
Preliminary
Bio-Zyme® (Digestive Enzyme Complex)
Digestive support
Commonly taken with meals; dose varies by product.
Preliminary
Biootic® (Probiotic Cultures)
Digestive support
Commonly billions of CFU per day, depending on the strain.
Preliminary
Brewster Probiotics™ (Probiotic Cultures)
Digestive support
Varies by strain and product; commonly billions of CFU per day.
Preliminary
Champex® (Champignon Mushroom Extract — Agaricus bisporus)
Gut environment support
Commonly around 200 to 400 mg per day.
Preliminary
Digesten® (Digestive Enzyme Blend)
Digestive support
Taken with meals; dose varies by product.
Preliminary
Gevalin® (Bael Fruit for Digestive Health — Zeus Hygia)
Digestive support
Around 250 mg per day.
Very Strong
Pancrelipase / Pancreatin
Pancreatic exocrine insufficiency (PEI) treatment
Prescription PERT: 25,000–80,000 USP lipase units per main meal (cystic fibrosis, chr
Strong
BetaVia™ (Euglena gracilis Algae Beta-1,3-Glucan — Kemin)
Fewer URTI sick days (90-day RCT)
Pivotal trial: 367 mg/day BetaVia Complete for 90 days. Kemin recommended dosing: 375
Strong
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
Strong
Lactase (β-Galactosidase)
Lactose intolerance symptom relief
3,000–9,000 FCC units per dairy serving; typical OTC tablets contain 6,000–9,000 FCC
Limited
Optiziome® P3 Hydrolyzer® (Protease Blend — BIO-CAT)
14% higher EAA, 15% higher BCAA with whey protein
Per BIO-CAT P3 Hydrolyzer product specification
Strong
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:
Moderate
Limonene (D-Limonene)
GERD/heartburn symptom relief (open trials)
GERD (Wilkins 2002 + Sun 2007): 1000 mg orally daily or QOD. CANCER PHASE I/II: 0.5-1
Moderate
Tolerase® G (AN-PEP Gluten-Digesting Enzyme — DSM)
Breaks down gluten in the stomach
With gluten-containing meals
Limited
Gastro-AD® (Fermented Soy Postbiotic — Lallemand)
Stomach comfort
Per the product specification.
Limited
GutGard® (Deglycyrrhizinated Licorice — Natural Remedies)
Reflux and indigestion
Around 150 mg per day.
Limited
Lactobacillus gasseri
Abdominal fat: one trial, one strain, in fermented milk
10 billion CFU/day (BNR17 weight loss); 200 mL fermented milk with 5 × 10^10 CFU/100
Limited
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
Limited
Lactobacillus johnsonii La1 (NCC533 / CNCM I-1225)
Cell-free La1 liquid partly lowered H. pylori in 20 adults
MICHETTI 1999 H. PYLORI: La1 whey-based culture supernatant ~10⁹ CFU/mL adults. FERME
Limited
LuraLean® (Glucomannan Fiber Blend — AHD International)
Small average weight difference in konjac fiber trials
Per LuraLean product specification (typical 2-4 g/day)
Limited
MucoSave® FG (Prickly Pear and Olive Extract — Bionap)
Studied in people with reflux symptoms
Around 200 mg per day.
Limited
Myrrh (Commiphora molmol)
Anti-inflammatory Activity (Mechanistic / Preclinical)
MIRAZID® antiparasitic: 600 mg (2 × 300 mg) daily empty stomach × 3-6 d. Soliman 2004
Limited
Salba® / Premium Chia (Salvia hispanica — AHD International)
Highest Plant Omega-3 ALA Content
1-2 tablespoons (10-25 g) chia seeds daily
Preliminary
Amylase
Prescription enzyme therapy in people with pancreatic insufficiency (not a supplement…
Combined enzyme blends: 5,000–25,000 DU per meal; Prescription PERT contains amylase
Preliminary
BioEcolians® (Alpha-Glucan Oligosaccharide — Solabia)
Fermented by bifidobacteria in laboratory cultures
Typically a few grams per day for digestive use; lower amounts in topical application