The central hypothesis is that improving hydration through increased water consumption will change the relative abundance of mucolytic bacteria found in the stool. Therefore the specific aims are 1) to quantify intervention effects on fecal microbiota relative abundance and plasma lipopolysaccharide binding protein, 2) observe the effects of the intervention on bowel frequency and signs/symptoms of gastrointestinal stress, and 3) to investigate relations between executive function and hydration status.
A single arm 3-week hydration intervention will be employed where participants increase their water consumption to 2 (F) or 2.5(M) liters per day which is approximately 70% of the AI for daily water consumption. Pre-test and follow-up measures of fecal microbiota, urinary hydration status, cognitive function, circulating markers, and dietary intake will be assessed at baseline and at 3-week follow up via laboratory visits.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
NONE
Enrollment
23
Participants will increase plain water consumption to at least 70% of the daily adequate intake for Americans depending on their sex.
University of Illinois at Urbana-Champaign
Urbana, Illinois, United States
Fecal microbiota relative abundance
changes in the relative abundance of fecal microbiota
Time frame: 3 weeks (baseline vs. follow-up)
Plasma lipopolysaccharide (LPS)
changes in circulating LPS
Time frame: 3 weeks (baseline vs. follow-up)
Copeptin
changes in plasma copeptin concentration
Time frame: 3 weeks (baseline vs. follow-up)
24hr Urine Osmolality
changes in osmolality (mOsmol/kg) of urine samples
Time frame: 3 weeks (baseline vs. follow-up)
Attentional accuracy
Accuracy (%) on a computerized flanker task
Time frame: 3 weeks (baseline vs. follow-up)
Attentional Reaction Time
Reaction time (ms) on a computerized flanker task
Time frame: 3 weeks (baseline vs. follow-up)
Attentional processing speed
P3 event related potential latency (ms) using a computerized flanker task
Time frame: 3 weeks (baseline vs. follow-up)
24hr Urine Specific Gravity
changes in specific gravity (USG) of urine samples
Time frame: 3 weeks (baseline vs. follow-up)
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