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DehydrationNCT05768789

Buoy Electrolyte Study on Hydration Status of Active Men and Women

A study testing Buoy Electrolyte, Water only and Nuun Electrolyte in people with Dehydration and Electrolyte Imbalance, run by University of Pittsburgh at 2 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Buoy is an all-natural, organic, FDA compliant dietary electrolyte supplement that can be dissolved in 8-12oz water (or other liquid) and provide electrolytes in servings of 1/3 teaspoon. This study will evaluate Buoy in hydrating active adults. Read more about this study

Who is it for?
Ages 18 to 45 yearsHealthy volunteers can take part
What is being tested?
Buoy Electrolyte, Water only and Nuun Electrolyte
Could I receive a placebo?
No, everyone receives an active treatment
How many people
30 participants
Where
2 sitesUnited States
Study dates
13 Sep 2023to 27 Apr 2024
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 45 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Male or female, >18 to 45 years of age
  • Freely given written consent
  • Non-tobacco users
  • Negative pregnancy test in women of childbearing potential
  • BMI < 35 kg/m2
  • GFR > 60 ml/min
Show all 12Show fewer
  • No known underlying medical condition
  • Willing to refrain from EtOH for 24h prior to test day
  • Willing to refrain from strenuous exercise for 24 h prior to each test day
  • Acceptable to have one 8oz cup of coffee/liquid on the morning of the test, but must be consistent each visit
  • Without active infection of any kind
  • Engaged in exercise three or more hours per week

Who cannot join

  • Abnormal creatinine (Cr > 1.2).
  • Proteinuria / hematuria / glucosuria based on urine dipstick.
  • Diagnosed medical condition that would impede results (CHF, HTN, CAD, CKD, history of electrolyte abnormality).
  • Pregnancy
  • Use of diuretics within past 2 weeks
  • Obesity (BMI > 35)
  • Active infection based on symptoms (bacterial or viral)
  • Hemodynamic abnormality at screening visit: Blood pressure less than 100/60 or greater than 140/90.

Trial locations and contacts

2 sites in 1 country.

United States2 sites
  • UPMC Montefiore Hospital

    Pittsburgh, Pennsylvania, 152132

  • UPMC Presbyterian

    Pittsburgh, Pennsylvania, 15213

Other trials in United States

About this study

Official title: The Impact of Buoy on Hydration Status of Active Men and Women

Buoy is an all-natural, organic, FDA compliant dietary electrolyte supplement that can be dissolved in 8-12oz water (or other liquid) and provide electrolytes in servings of 1/3 teaspoon. This study will evaluate Buoy in hydrating active adults.

Read the detailed description

Prior to initiation of the study, participants will have a screening visit to complete informed consent and health history. The history for females will include their last date for menstruation and/or birth control method to take into consideration the effects of ovulation on water retention. During this visit we will measure heart rate, blood pressure, height, weight. Females will be administered a urine pregnancy test.

Participants must refrain from vigorous exercise within 24 hours of study visit. Participants will fast (food) overnight for 10h prior to initiation of test. Upon waking they are asked to empty their bowel \& bladder. They can consume one 8oz cup of coffee or other liquid. They will present at 7-8am at which time they will be asked to empty their bladder again. After resting for 5 minutes baseline vitals will be taken, including blood pressure, heart rate, weight, bioimpedance. Urinalysis dipstick for protein/blood/glucose and i-STAT measurement for creatinine and electrolytes on Visit 1 to confirm eligibility. For Visit 2 and Visit 3, the participant will be asked to review medical history and any change in status may warrant an additional baseline creatinine and blood/protein test to confirm eligibility. Additional food or beverage will not be allowed throughout the study period. All studies will be repeated in the same subject using either Buoy (intervention) or water (control) or Nuun (intervention). Urine will be collected at four specific timepoints during the intervention and the volume will be recorded. If participants need to urinate between scheduled collection times, urine will be collected, volume recorded, and combined with the urine collection of the following timepoint. These urine samples will be measured and a fraction of it will be sent to the lab to be tested for the following electrolytes: sodium, potassium, chloride and urine osmolarity. Urine creatinine will also be tested at these timepoints.

Being tested
Buoy Electrolyte, Water only, Nuun Electrolyte
Keywords
dehydration, electrolyte, electrolyte supplement, electrolyte loss, electrolyte ingestion, hydration
Medical subject headings
Dehydration

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Buoy ElectrolyteDietary supplement

    Each subject consumed Beverage 1 (Buoy Hydration Drops) at a dose containing 600 mg/L of Na+ over 4 hours while measuring urine output over 6 hours.

  • Water onlyOther

    Each subjected ingested 1 L of Kirkland® bottled water at a rate of 6.25% of the total amount of water every 15 minutes for four hours

  • Nuun ElectrolyteDietary supplement

    Each subject consumed 1 L of water with two dissolved Nuun® Sport Hydration tabs (Nuun, Seattle, WA), containing 600 mg of sodium, over 30 minutes (2 equal volumes every 15 minutes) while measuring urine output over 6 hours (

Study groups in NCT05768789
Study groupRoleWhat they receive
Buoy Electrolyte then Water only then Nuun ElectrolyteExperimentalVisit 1: Buoy intervention amount is 4% of total body weight given in 16 divided doses over 4 hours. The goal is to give 600mg of Na+ over 4 hours while measuring urine output over 6 hours. Therefore, to safely achieve a total dose 600mg Na+ (6-fold increase from single dose) we will use 4 tsps (18 ml) of Buoy diluted in 1 L of water. Visit 2: Water serves as a control. Participants will ingest the same quantity of water (1 L) at a rate of 6.25% of the calculated amount of water every 15 min for 4 hours. Visit 3: Nuun intervention given as 1L bolus and then free water in divided doses for a total of 4% total body weight. The goal is to give a one-time dose of Nuun (600mg Na+) at the start of the trial, diluted in 1L water to be consumed within 30 min (similar to prior published data, Pence 2020).
Receives: Dietary Supplement: Buoy Electrolyte; Other: Water only; Dietary Supplement: Nuun Electrolyte

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Net Fluid Balance

    Determined by subtracting the cumulative urine output from the total fluid load consumed

    Measured: 360 minutes after ingestion

  2. Electrolytes in Urine

    Sodium levels will be measured

    Measured: Urine will be measured during each visit (three total visits that each last 6 hours)

  3. Urine Osmolarity (mOsm/kg)

    Osmolarity measures the concentration of solutes in urine. This is a key indicator of how concentrated or diluted the urine is, which directly reflects hydration status and kidney function. This can fluctuate depending on how much water the kidneys are excreting or retaining.

    Measured: 360 minutes after ingestion

Secondary outcomes (1)
  1. Bio Impedance

    Bio impedance measured through difference in body fat % pre- and post-urine

    Measured: 360-minutes after ingestion

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Mar 2023
  2. Study start13 Sep 2023
  3. Primary completion27 Apr 2024
  4. Study completion27 Apr 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Not applicable
Intervention model
Single group
Model description
All participants received the interventions in the same order one after the other on different days (Buoy, then Water, then Nuun) to complete the 3 arms of the study
Masking
None (open label)
Enrolment
30 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05768789
Sponsor's protocol ID
STUDY22090018
Status last verified
May 2025
First submitted
25 Oct 2022
Last updated
14 May 2025
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Perrier ET. Shifting Focus: From Hydration for Performance to Hydration for Health. Ann Nutr Metab. 2017;70 Suppl 1:4-12. doi: 10.1159/000462996. Epub 2017 Jun 15.

    PubMed 28614817
  • Liska D, Mah E, Brisbois T, Barrios PL, Baker LB, Spriet LL. Narrative Review of Hydration and Selected Health Outcomes in the General Population. Nutrients. 2019 Jan 1;11(1):70. doi: 10.3390/nu11010070.

    PubMed 30609670
  • Popkin BM, D'Anci KE, Rosenberg IH. Water, hydration, and health. Nutr Rev. 2010 Aug;68(8):439-58. doi: 10.1111/j.1753-4887.2010.00304.x.

    PubMed 20646222
  • Nuccio RP, Barnes KA, Carter JM, Baker LB. Fluid Balance in Team Sport Athletes and the Effect of Hypohydration on Cognitive, Technical, and Physical Performance. Sports Med. 2017 Oct;47(10):1951-1982. doi: 10.1007/s40279-017-0738-7.

    PubMed 28508338
  • Von Duvillard SP, Braun WA, Markofski M, Beneke R, Leithauser R. Fluids and hydration in prolonged endurance performance. Nutrition. 2004 Jul-Aug;20(7-8):651-6. doi: 10.1016/j.nut.2004.04.011.

    PubMed 15212747
  • American College of Sports Medicine; Sawka MN, Burke LM, Eichner ER, Maughan RJ, Montain SJ, Stachenfeld NS. American College of Sports Medicine position stand. Exercise and fluid replacement. Med Sci Sports Exerc. 2007 Feb;39(2):377-90. doi: 10.1249/mss.0b013e31802ca597.

    PubMed 17277604
  • Lee EC, Fragala MS, Kavouras SA, Queen RM, Pryor JL, Casa DJ. Biomarkers in Sports and Exercise: Tracking Health, Performance, and Recovery in Athletes. J Strength Cond Res. 2017 Oct;31(10):2920-2937. doi: 10.1519/JSC.0000000000002122.

    PubMed 28737585
  • Kenefick RW. Drinking Strategies: Planned Drinking Versus Drinking to Thirst. Sports Med. 2018 Mar;48(Suppl 1):31-37. doi: 10.1007/s40279-017-0844-6.

    PubMed 29368181
  • Love TD, Baker DF, Healey P, Black KE. Measured and perceived indices of fluid balance in professional athletes. The use and impact of hydration assessment strategies. Eur J Sport Sci. 2018 Apr;18(3):349-356. doi: 10.1080/17461391.2017.1418910. Epub 2018 Jan 24.

    PubMed 29364084
  • Maughan RJ, Shirreffs SM. Development of hydration strategies to optimize performance for athletes in high-intensity sports and in sports with repeated intense efforts. Scand J Med Sci Sports. 2010 Oct;20 Suppl 2:59-69. doi: 10.1111/j.1600-0838.2010.01191.x.

    PubMed 20840563
  • Evans GH, James LJ, Shirreffs SM, Maughan RJ. Optimizing the restoration and maintenance of fluid balance after exercise-induced dehydration. J Appl Physiol (1985). 2017 Apr 1;122(4):945-951. doi: 10.1152/japplphysiol.00745.2016. Epub 2017 Jan 26.

    PubMed 28126906
  • Pence J, Bloomer RJ. Impact of Nuun Electrolyte Tablets on Fluid Balance in Active Men and Women. Nutrients. 2020 Oct 2;12(10):3030. doi: 10.3390/nu12103030.

    PubMed 33023276
  • Maughan RJ, Watson P, Cordery PA, Walsh NP, Oliver SJ, Dolci A, Rodriguez-Sanchez N, Galloway SD. A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index. Am J Clin Nutr. 2016 Mar;103(3):717-23. doi: 10.3945/ajcn.115.114769. Epub 2015 Dec 23.

    PubMed 26702122

Questions about this trial

What is this clinical trial studying?

A study testing Buoy Electrolyte, Water only and Nuun Electrolyte in people with Dehydration and Electrolyte Imbalance, run by University of Pittsburgh at 2 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 14 May 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 14 May 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Net Fluid Balance (time frame: 360 minutes after ingestion). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05768789, which also lists 13 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 May 2025.

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