Hydration
Glycerol (Hyperhydration)
Also known as: Glycerin, GlycerPump
Osmotic agent that helps retain water for enhanced hydration. Used by endurance athletes.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Hyperhydration
- Endurance performance
- Heat tolerance
How it works
- Osmotic water retention
- Delays dehydration
- Improves thermoregulation
Dosage
- Typical range
- 1-2g/kg body weight (pre-event)
- Timing
- 1-2 hours before event with water
- With food
- With lots of water
- Duration
- Event-specific use
- Special populations
- Endurance athletes, hot conditions
Forms
- Powder
- Liquid
Safety
Common side effects
- Bloating
- GI upset
- Headache
Contraindications
- Kidney disease
- Diabetes
Evidence notes
Endurance athlete hydration
Grade B: Some human trials support key claims; further confirmation needed.
Related in Hydration
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.