How much water should someone on GLP-1 drink?
Direct answer: aim for roughly 30–40 mL/kg as a starting point, then adjust up for activity, climate, and side effects like constipation.
Why thirst signals can be unreliable on GLP-1
Direct answer: GLP-1 medications can blunt appetite and thirst; that means scheduled sipping and urine color checks are better cues than waiting to feel thirsty.
Practical tips
- Carry a small water bottle and sip regularly.
- Prefer electrolyte-containing fluids if you have GI losses or show lightheadedness.
- Use urine color (pale straw) as a quick check — very dark urine = drink more and check with clinician if persistent.