RecruitingNot Applicable

Effects of Variations in Caffeinated Beverages on Well-being

United States75 participantsStarted 2026-01-05

Plain-language summary

This study will evaluate post-beverage subjective caffeine responses and physiological responses to caffeinated beverage variations in generally healthy adults.

Who can participate

Age range

18 Years – 55 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. Males or females, ≥18 to ≤55 years of age
. BMI ≥18.5 and \<35.0 kg/m2
. Generally good health
. Participant currently and consistently has a sweetened caffeine routine
. Participant is willing to substitute their current caffeine routine for the test beverage daily
. Participant has never consumed the test beverage or similar products
. Participant currently owns a wearable and is willing to use and connect the wearable device
. Willing to use personal smart phone, tablet, or personal computer with stable internet connection

Exclusion criteria

. History or presence, on the basis of the health history, of clinically important condition or disease states
. Is currently following, or planning to be on, a weight loss regimen
. Weight loss or gain \>4.5 kg

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Subjective caffeine visual analog scales

Timeframe: Day 5

Trial details

NCT IDNCT07404254

SponsorGUAYAKI SUSTAINABLE RAINFOREST PRODUCTS, INC.

Sponsor typeINDUSTRY

Study typeINTERVENTIONAL

Primary completion2026-03-31

Contact for this trial

VP Product Innovation, Guayaki Sustainable Rainforest Products

609-799-6067 info@guayaki.com

View on ClinicalTrials.gov More Healthy trials