Research Library
Browse 776 referenced studies across 253 ingredients. Every claim on SuppIndex is backed by peer-reviewed research.
776
Total Studies
764
Human Trials
176
Meta-Analyses
253
Ingredients
Search and filter studies
Study results
Showing 1–25 of 776 matching studies (776 indexed)
Effects of LEUVATE on glycemia, insulinemia, aminoacidemia and protein synthesis in GLP-1 RA-treated adults (Leuvate001)
ClinicalTrials.gov NCT07595575 (Traylor, Nutraceutical Innovations LLC; collaborators: University of Toronto, Queen's, Arkansas, DePaul). Registered acute-feeding RCT investigating LEUVATE on post-ingestion glycemia, insulinemia, aminoacidemia and whole-body protein synthesis in adults prescribed GLP-1 receptor agonists. Not yet recruiting at time of listing — the first product-specific human trial on the LEUVATE brand.
Population
Clinical Patients
Duration
Acute postprandial
Dosage
LEUVATE amino-acid-enriched beverage vs comparator
Effects of carnosine supplementation on physical endurance: a placebo-controlled randomized clinical trial.
Placebo-controlled randomized trial (n=299) of 2 g/day carnosine over ~12 weeks assessing multiple physical performance measures.
Population
General Population
Sample Size
n=299
Duration
~12 weeks
Dosage
2 g/day
Double-blind RCT in 29 club-level rugby players compared 38 g/day bovine colostrum versus soy protein for 8 weeks. Assessed strength, power, aerobic fitness, body composition and salivary immune/inflammatory markers.
Population
Athletes
Sample Size
n=29
Duration
8 weeks
Dosage
38 g/day
The Effects of 8-Week Creatine Hydrochloride and Creatine Ethyl Ester Supplementation on Cognition, Clinical Outcomes, and Brain Creatine Levels in Perimenopausal and Menopausal Women (CONCRET-MENOPA): A Randomized Controlled Trial.
Randomised double‑blind 8‑week trial in 36 perimenopausal and menopausal women comparing low and medium doses of creatine hydrochloride, a creatine hydrochloride plus creatine ethyl ester group, and placebo. Medium‑dose creatine hydrochloride improved reaction time, increased frontal brain creatine, and improved lipid profile versus placebo. The creatine hydrochloride plus creatine ethyl ester group (800 mg/day listed) was included but specific effects attributable to CEE alone were not reported.
Population
General Population
Sample Size
n=36
Duration
8 weeks
Dosage
Creatine hydrochloride plus creatine ethyl ester (800 mg/day reported for that arm); other arms used 750 mg/day or 1,500 mg/day creatine HCl
Creatine formulations and repeated sprint training: effects on physical and physiological adaptations in soccer players during the short-term preparation phase.
Randomised trial in 40 collegiate male soccer players during a 4‑week preparatory phase comparing creatine monohydrate, creatine ethyl ester, creatine hydrochloride and placebo alongside repeated sprint training. All training groups improved, but creatine supplement groups had greater changes than placebo; the CEE and HCl groups showed larger gains in physical performance and peak power than creatine monohydrate.
Population
Athletes
Sample Size
n=40
Duration
4 weeks
Creatine formulations and repeated sprint training: effects on physical and physiological adaptations in soccer players during the short-term preparation phase.
Randomised trial in 40 collegiate male soccer players over a 4‑week repeated sprint training period comparing creatine monohydrate, creatine ethyl ester, creatine hydrochloride and placebo. Assessed jumps, sprint times, Wingate power and incremental exercise tests.
Population
Athletes
Sample Size
n=40
Duration
4 weeks
Dosage
Not specified in abstract for each formulation
The Effects of 8-Week Creatine Hydrochloride and Creatine Ethyl Ester Supplementation on Cognition, Clinical Outcomes, and Brain Creatine Levels in Perimenopausal and Menopausal Women (CONCRET-MENOPA): A Randomized Controlled Trial.
Randomised, double‑blind trial in 36 perimenopausal and menopausal women over 8 weeks testing low (750 mg/day), medium (1500 mg/day) Cr‑HCl, Cr‑HCl plus creatine ethyl ester (800 mg/day), and placebo. Assessed cognition, brain creatine, clinical and biochemical markers.
Population
General Population
Sample Size
n=36
Duration
8 weeks
Dosage
750 mg/day and 1500 mg/day Cr‑HCl; combination arm 800 mg/day with ethyl ester
Effects of γ-Aminobutyric Acid (GABA) Supplementation on Symptoms, Quality of Life, Intestinal Permeability, Systemic Inflammation and Gut Microbiota in Patients with IBS-D: A Randomized, Double Blind, Placebo-Controlled, Crossover Pilot Study.
Randomized double‑blind placebo‑controlled crossover pilot study in 20 IBS‑D patients testing a GABA‑based supplement versus placebo for two 4‑week periods separated by a 2‑week washout.
Population
Clinical Patients
Sample Size
n=20
Duration
Two 4‑week treatment periods
Dosage
Not specified in abstract
Impact of high-dose vitamin D and calcium carbonate supplementation on bone density in adolescents living with HIV: a randomised, placebo-controlled trial.
Randomised, placebo‑controlled trial in 842 peripubertal adolescents with HIV given weekly high‑dose vitamin D3 plus daily calcium carbonate 500 mg for 48 weeks. Primary bone density outcomes (TBLH‑BMD, LS‑BMAD) did not differ overall, but among those with vitamin D insufficiency at baseline a small improvement in lumbar spine BMAD Z score was observed.
Population
Clinical Patients
Sample Size
n=842
Duration
48 weeks
Dosage
Calcium carbonate 500 mg/day (with weekly 20,000 IU vitamin D3)
Effects of daily multivitamin-multimineral and cocoa extract supplementation on epigenetic aging clocks in the COSMOS randomized clinical trial.
2‑year ancillary study within COSMOS testing daily cocoa extract (500 mg cocoa flavanols/day including 80 mg (-)-epicatechin) versus placebo on five DNA methylation ageing clocks in 958 older adults.
Population
General Population
Sample Size
n=958
Duration
2 years
Dosage
500 mg cocoa flavanols/day (80 mg (-)-epicatechin)
A randomised controlled study to investigate the cognitive, mood, metabolic and anti-inflammatory effects of acute oyster mushroom intervention in healthy older adults.
Randomised crossover acute dietary study in healthy older adults consuming soups containing 0.5, 1 and 2 servings of oyster mushroom (rich in ergothioneine) and a calorie-matched control; outcomes assessed up to 6 hours post-consumption.
Population
General Population
Sample Size
n=33
Duration
Acute, single-day cross-over (measurements at baseline and 2, 4, 6 hours)
Dosage
0.5 to 2 servings of oyster mushroom in noodle soup (single acute exposures)
Ergothioneine as a potential geroprotector: Targeting molecular hallmarks of ageing and age-related diseases.
Systematic review framing ergothioneine as a candidate geroprotector, covering evidence from 2005–2025 and discussing pharmacokinetics via OCTN1 and potential to modulate hallmarks of ageing.
Population
Mixed
Efficacy and safety of green-lipped mussel powder supplementation in adults with knee osteoarthritis: a randomized, double-blind, placebo-controlled trial.
Randomised, double‑blind, placebo‑controlled 12‑week trial of green‑lipped mussel powder (1,000 mg/day) versus placebo in adults with symptomatic radiographic knee osteoarthritis. Primary endpoint was change in WOMAC total score.
Population
Clinical Patients
Sample Size
n=100
Duration
12 weeks
Dosage
1,000 mg/day (GLMP)
Comparative efficacy and acceptability of anxiolytic drugs for the treatment of anxiety disorders: a systematic review and network meta-analysis.
Network meta-analysis including pharmacological and phytopharmaceutical treatments for anxiety disorders reported Silexan as both effective and as acceptable as placebo, and among few treatments with fewer adverse events than placebo.
Population
Clinical Patients
Sample Size
n=28637
Duration
studies from 1980–2020
Nattokinase supplementation for cognitive enhancement in asymptomatic intracranial/carotid stenosis: A randomized controlled trial.
Single-centre double-blind RCT of 120 patients with asymptomatic intracranial/carotid stenosis randomized to nattokinase 8,000 FU/day or placebo for 6 months, assessing cognition and brain MRI.
Population
Clinical Patients
Sample Size
n=120
Duration
6 months
Dosage
8,000 FU/day
NAD⁺ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence.
PRISMA-guided systematic review (2010–Oct 2025) of preclinical and clinical NAD+-related compound interventions, identifying 33 human intervention studies and 80 rodent studies.
Population
Mixed
Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
Randomized, double-blind, crossover study in 14 male university rowers comparing four conditions (caffeine+paraxanthine, caffeine alone, paraxanthine alone, placebo), each with 200 mg doses, assessing 2000-m ergometer performance and subjective sleep measures.
Population
Athletes
Sample Size
n=14
Duration
Single-dose, acute
Dosage
200 mg paraxanthine alone; 200 mg caffeine alone; 200 mg each in combined arm
Polypore mushroom mycelia as an adjunct to COVID-19 vaccination: a randomized clinical trial.
Randomised, double-blind, placebo-controlled trial of a fungal mycelium product containing Fomitopsis officinalis and Trametes versicolor (FoTv) as an adjunct to COVID-19 vaccination; outcomes included safety, vaccine side-effects and anti‑SARS‑CoV‑2 antibody levels.
Population
General Population
Sample Size
n=90
Duration
Follow-up to 6 months for antibodies
Dosage
Eight 500 mg capsules three times daily for four days (as reported in the abstract)
Anti-inflammatory effects of chamomile (Matricaria chamomilla L.): a systematic review and meta-analysis of randomised controlled trials
Meta-analysis of RCTs showing chamomile significantly reduces CRP and IL-6 in humans.
Population
Mixed
Sample Size
n=500
Duration
Variable
Dosage
Chamomile preparations standardised to apigenin
Plasma leucinemia following a leucine-enriched whey–casein blend (LEUCY) in younger and mid-aged adults
Traylor, Lees, Nunes, Phillips (Current Developments in Nutrition, 2025, 106209). The LEUCY leucine-enriched whey–casein blend produced higher early-postprandial plasma leucine and modestly elevated leucinemia across the 240-min post-feeding window vs comparator protein supplements — the first published human PK profile from the Leuvate research programme (DOI: 10.1016/j.cdnut.2025.106209).
Population
General Population
Duration
Acute (240 min)
Dosage
Leucine-enriched whey–casein blend vs comparators
Anti-sarcopenic effect of leucine-enriched branched-chain amino acid supplementation among elderly chronic kidney disease patients: a double-blinded randomized controlled trial.
Double‑blind RCT in elderly chronic kidney disease patients testing oral leucine‑enriched BCAA (60% leucine; 4.5 g leucine, total BCAA 7.5 g/day) versus placebo for 12 weeks.
Population
Clinical Patients
Sample Size
n=55
Duration
12 weeks
Dosage
Leucine‑enriched BCAA: 4.5 g leucine + 1.5 g valine + 1.5 g isoleucine per day (total 7.5 g/day)
Yeast Beta-Glucan Enhances Antibody Response Following Influenza Vaccination - A Double-Blind, Randomized, Placebo-Controlled Pilot Trial.
Double-blind, randomised, placebo-controlled pilot trial in older adults (mean age ~71) assessing 500 mg/day yeast beta-glucan versus placebo given around seasonal influenza vaccination with antibody titres measured pre- and 4 weeks post-vaccination.
Population
Elderly
Sample Size
n=90
Duration
4 weeks post-vaccination (supplementation around vaccination period)
Dosage
500 mg/day
Effectiveness of Exogenous Ketone Salts in Enhancing Circulating Acetoacetate Levels-A Pilot Study in Healthy Adults.
Randomized triple-blind placebo-controlled crossover pilot: ketone salt increased plasma acetoacetate and beta-hydroxybutyrate significantly compared with placebo in healthy adults 30 minutes after ingestion.
Population
General Population
Sample Size
n=13
Duration
Acute (30 minutes post-dose)
Dosage
Ketone salt (dose not specified in abstract beyond being a KS product)
Clinical Benefits of Exogenous Ketosis in Adults with Disease: A Systematic Review.
Systematic review of exogenous ketosis in adults with disease (51 studies): suggested potential benefits across neurological, metabolic and cardiovascular disorders but evidence often relied on surrogate endpoints and ketone esters were favoured for achieving tolerable therapeutic ketosis; results are preliminary.
Population
Clinical Patients
Sample Size
n=51
Duration
Varied
Dosage
Varied across studies and formulations
Effects of different dietary supplements on athletic performance in soccer players: a systematic review and network meta-analysis.
Systematic review and network meta-analysis of dietary supplements in soccer players (80 RCTs). Bovine colostrum was one of several supplements associated with a moderate increase in distance covered relative to placebo in the network analysis.
Population
Athletes
Sample Size
n=1425
751 remaining
