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CompletedNCT06414291LIV-D2OUpdated Aug 28, 2025

Rehydration Efficiency During Ad-libitum Fluid Intake

An interventional study of Plain Water and Liquid IV Hydration Multiplier in Dehydration, sponsored by Arizona State University. Completed at 1 site in United States. Open to participants aged 18 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-28.

Sponsored by Arizona State University · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years to 60 Years
Sex
All
01

Study summary

It is well established that rehydration with a carbohydrate-electrolyte solution is more effective in comparison to plain water. This is primarily based on the sodium-glucose co transporter, based on which the world health organization has based its oral rehydration solution recommendations. Also, rehydration with a solution that includes sodium and glucose plasma osmolality should not drop as much as it happens during rehydration with water. As a result, we should have higher fluid intake due to higher thirst perception and lower urinary output due to higher levels of vasopressin.

The present study aims to examine the effectiveness of a electrolyte-glucose drink on rehydration following exercise-induced dehydration.

02

Conditions studied

  • Dehydration

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03

In context

Dehydration

201 studies on the registry are indexed under Dehydration; 28 are open to participants now.

This study's enrollment of 20 is below the median of 43 across 145 interventional studies indexed under Dehydration.

Browse Dehydration studies →

Lead sponsor

Arizona State University is the lead sponsor of 238 studies on the registry; 42 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age 18-60 years
  • Training at least 2 times per week
  • stable weight for the last 2 months (fluctuation less than 5 pounds)

Exclusion criteria

Exclusion Criteria:

  • Night shifting work
  • Thyroid medication
  • Bariatric surgery
  • Cardiovascular disease
  • Renal disease
  • Hepatic disease
  • Participating in another study at the same time
  • Bodyweight over 110 pounds
05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Single (Participant)
Enrollment
20 participants (actual)

Study arms

  • Placebo comparator
    Water

    Rehydration with low mineral content bottle water

    Other: Plain Water

  • Experimental
    Carbohydrate Electrolyte solution

    Drink with 22 grams of carbohydrate, 1020 milligrams of sodium, and 760 milligrams of potassium per liter. Hydration multiplier liquid IV

    Other: Liquid IV Hydration Multiplier

  • Experimental
    Low Sugar electrolyte solution

    10 grams of carbohydrate, 1060 milligrams of sodium, and 760 milligrams of potassium per liter. Sugar free Liquid IV

    Other: Liquid IV Sugar Free

Interventions

  • OtherPlain Water

    Plain water without calories, sweetener, or electolytes

  • OtherLiquid IV Hydration Multiplier

    Drink with 22 grams of carbohydrate, 1020 milligrams of sodium, and 760 milligrams of potassium per liter. Hydration multiplier liquid IV

  • OtherLiquid IV Sugar Free

    10 grams of carbohydrate, 1060 milligrams of sodium, and 760 milligrams of potassium per liter. Sugar free Liquid IV

06

What researchers measure

Primary outcomes

  1. Total fluid intake

    Total amount of fluid ingested

    Time frame: 4 hours of rehydration

  2. Net fluid balance

    amount of water retained during the rehydration period

    Time frame: at 4 hours of the rehydration period

  3. Net fluid balance

    amount of water retained during the rehydration period

    Time frame: at 3 hours of the rehydration period

  4. Rate of absorption

    The rate of Deuterium appearance in the blood during 30 minutes of rehydration

    Time frame: during the first 30 minutes of rehydration

  5. Rate of absorption

    The rate of Deuterium appearance in the blood during 60 minutes of rehydration

    Time frame: during the first 60 minutes of rehydration

  6. Rate of absorption

    The rate of Deuterium appearance in the blood during 120 minutes of rehydration

    Time frame: during the first 120 minutes of rehydration

  7. Rate of absorption

    The rate of Deuterium appearance in the blood during 180 minutes of rehydration

    Time frame: during the first 180 minutes of rehydration

  8. Rate of absorption

    The rate of Deuterium appearance in the blood during 240 minutes of rehydration

    Time frame: during the first 240 minutes of rehydration

  9. Cumulative urine output

    Total amount of urine output during rehydration

    Time frame: during the first 3 hours of rehydration

  10. Cumulative urine output

    Total amount of urine output during rehydration

    Time frame: during the first 4 hours of rehydration

Secondary outcomes

  1. Plasma copeptin

    Plasam Copeptin during rehydration

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

  2. Plasma volume

    percent of plasma volume recovery during the rehydration

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

  3. Free water Clearance

    Free water clearance calculated based on plasma and urine osmolality

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

  4. Free Osmotic Clearance

    Free Osmotic clearance calculated based on plasma and urine osmolality

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

  5. Thirst

    Thirst estimated with a visual analog scale from 0-125 millimeters with higher value indicating greater perception

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

  6. Stomach fullness

    Stomach fullness estimated with a visual analog scale from 0-125 millimeters with higher value indicating greater perception

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

  7. Taste Likeness

    Taste Likeness estimated with a visual analog scale from 0-125 millimeters with higher value indicating greater perception

    Time frame: at 30 minutes, 1 hour, 2 hours, 3 hours and 4 hours of the rehydration period

07

Study locations

1 site
  • Interdisciplinary Science and Technology Building 8
    Phoenix, Arizona 85004, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 28, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06414291
Responsible party
Stavros Kavouras (Professor & Assistant Dean, Arizona State University) — Principal investigator
First posted
May 16, 2024
Start date
May 21, 2024
Primary completion
Dec 2, 2024
Completion
Dec 3, 2024
Last update
Aug 28, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.

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