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Showing 1–24 of 38 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Consume coffee Clear all
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players

NCT07641335
View directory record Official record
Conditions
Cognitive Performance, Attention, Reaction Time, Caffeine
Interventions
Caffeinated Coffee, Decaffeinated Coffee Placebo
Dietary Supplement
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Optimizing Chronic Pain Treatment With Enhanced Neuroplastic Responsiveness

NCT02681081
View directory record Official record
Conditions
Pain, Osteoarthritis
Interventions
Glucose Administration, Intermittent Fasting, Control
Other
Lead sponsor
University of Florida
Other
Eligibility
50 Years to 85 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 14, 2019 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional

The Effect of Coffee Consumption in Enhancing Recovery of Bowel Function Following Colorectal Surgery.

NCT02639728
View directory record Official record
Conditions
Postoperative Ileus
Interventions
Regular Coffee, Decaffeinated coffee, Warm water
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 20, 2022 · Synced Sep 2, 2026, 6:34 AM EDT
Active, not recruiting Not applicable Interventional

A Study of Time Restricted Eating in Obese Adults

NCT05660291
View directory record Official record
Conditions
Overweight
Interventions
Early time-restricted eating, Late time-restricted eating
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 64 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Sep 2, 2026, 6:34 AM EDT
Not listed Not applicable Interventional

The Effects of Specialty Coffee on Cognitive Function in People With Type 2 Diabetes

NCT05709847
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Coffee
Other
Lead sponsor
University of Reading
Other
Eligibility
55 Years to 70 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Caffeine- and Protein-Containing Coffee Beverage on Metabolism and Muscular Performance

NCT04180787
View directory record Official record
Conditions
Exercise Performance, Metabolism
Interventions
Beverage Consumption
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 40 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 6, 2020 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Coffee and Real-time Atrial and Ventricular Ectopy

NCT03671759
View directory record Official record
Conditions
Premature Atrial Contractions, Premature Ventricular Contractions
Interventions
Start: On Caffeine, Start: Off Caffeine
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Sep 2, 2026, 6:34 AM EDT
Active, not recruiting Not applicable Interventional

Time Restricted Eating to Mitigate Obesity in Veterans With Spinal Cord Injury

NCT05921487
View directory record Official record
Conditions
Spinal Cord Injury, Obesity
Interventions
Time Restricted Eating
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 89 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Fuel and Rhythm (FAR) Phase 2 Study

NCT05482711
View directory record Official record
Conditions
Aging
Interventions
Time Restricted Eating Intervention
Other
Lead sponsor
University of Florida
Other
Eligibility
65 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Phase 1 Dose Escalation of ArtemiCoffee

NCT04805333
View directory record Official record
Conditions
Ovarian Cancer
Interventions
Artemisia annua 450mg, Artemisia annua 900mg, Artemisia annua 1350mg, Artemisia annua 1800mg, Artemisia annua - recommended phase II dose
Drug
Lead sponsor
Frederick R. Ueland, M.D.
Other
Eligibility
18 Years and older · Female only
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 9, 2025 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Fasting ENHANCE Pilot Study

NCT05732935
View directory record Official record
Conditions
Overweight and Obesity, Time Restricted Feeding, Alzheimer Disease
Interventions
Time Restricted Eating intervention, Successful Aging Comparison Group (LEARN)
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
65 Years and older
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Time-restricted Eating Versus Daily Continuous Calorie Restriction on Body Weight and Colorectal Cancer Risk Markers

NCT05114798
View directory record Official record
Conditions
Time Restricted Eating, Obesity, Weight Loss, Colorectal Cancer
Interventions
Time restricted eating, Calorie Restriction
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
45 Years to 70 Years
Enrollment
194 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Heart Health Benefits of Whole Grain Barley and Oats in Healthy Men and Women

NCT01283672
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Controlled diet with whole grain barley, whole grain oats, or low grain diet
Other
Lead sponsor
United States Department of Agriculture (USDA)
Federal
Eligibility
25 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Beltsville, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 17, 2011 · Synced Sep 2, 2026, 6:34 AM EDT
Recruiting Not applicable Interventional

Feasibility and Acceptibility of a Multi-site Trial of Time Restircted Eating During Chemotheraply for Breast Cancer.

NCT07387445
View directory record Official record
Conditions
Breast Cancer Early Stage Breast Cancer (Stage 1-3), Breast Neoplasm Female, Breast Cancer
Interventions
Time restricted eating
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
25 Years to 99 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Preliminary Effect of Food Processing and Sweeteners on Glycemic and Metabolic Measures

NCT05658757
View directory record Official record
Conditions
Blood Sugar; High, Blood Pressure, Dietary Habits
Interventions
Regular sweetened commercial foods, Allulose sweetened commercial foods, Whole and minimally processed and sweetened foods
Other
Lead sponsor
University of California, Irvine
Other
Eligibility
20 Years to 99 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 2, 2026, 6:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Healthy Volunteers Enteral Nutrition Study (HEN)

NCT07426003
View directory record Official record
Conditions
Enteral Nutrition's Effect on the Gut
Interventions
Kate Farms Peptide 1.5, Crohn's disease exclusion diet
Dietary Supplement · Other
Lead sponsor
James Lewis
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Changes in 24-hour Activity Cycle Behaviors During a Time-Restricted Eating Intervention in College-Aged Women

NCT07520786
View directory record Official record
Conditions
Sleep Quality, Compliance, Physical Activity, Sedentary Behaviors, Sleep Duration
Interventions
Time Restricted Eating, Control
Behavioral
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 26 Years · Female only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Examine the Effect of a Thermogenic Energy Drink in Healthy Adults

NCT05061797
View directory record Official record
Conditions
Metabolism
Interventions
Thermogenic Energy Drink - Active Study Product Formula, Placebo
Dietary Supplement
Lead sponsor
Rowdy Energy
Industry
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated May 1, 2022 · Synced Sep 2, 2026, 6:34 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Towards Understanding Between ADT Treatment, Circadian Rhythm, and Physiological Responsiveness

NCT05968144
View directory record Official record
Conditions
Prostatic Neoplasm, Survivorship, Frailty, Aging, Metastatic Breast Cancer
Interventions
Dietary recommendations, Time-restricted eating
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
55 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Withdrawn Not applicable Interventional

The Effects of Caffeine on Deep Inferior Epigastric Perforator (DIEP) Flap Perfusion

NCT04249934
View directory record Official record
Conditions
Breast Reconstruction, Deep Inferior Epigastric Perforator, Microvascular Free Flap Transfer
Interventions
Caffeinated Coffee, DecaffeinatedCoffee
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 10, 2021 · Synced Sep 2, 2026, 6:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Comparison of Residual Gastric Volume Between Children Who Drink Different Clear Oral Fluid Volume

NCT03741777
View directory record Official record
Conditions
Fasting, Gastric Emptying
Interventions
Clear oral fluid
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
13 Years to 17 Years
Enrollment
288 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Time to Eat Study - Pilot

NCT03590847
View directory record Official record
Conditions
Overweight
Interventions
Intermittent Fasting
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
65 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Sep 2, 2026, 6:34 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Time Restricted Diet in Obese or Overweight Pre or Postmenopausal Participants

NCT02154984
View directory record Official record
Conditions
Healthy, no Evidence of Disease, Obesity
Interventions
behavioral dietary intervention, telephone-based intervention, laboratory biomarker analysis
Behavioral · Other
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 30, 2020 · Synced Sep 2, 2026, 6:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Evaluation of the Effect of Fasting and Exercise on Uptake of Tc-99m Sestamibi in Breast Tissue

NCT01944215
View directory record Official record
Conditions
Molecular Imaging
Interventions
Meal, Exercise, Sestamibi, Caffeine Tablet, External Heating
Dietary Supplement · Other · Radiation + 1 more
Lead sponsor
Mayo Clinic
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
154 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 2, 2026, 6:34 AM EDT