Why Hydration Matters
Hydration affects virtually every body system:
- Energy production & metabolism
- Cognitive function (focus, memory, and reaction time)
- Muscle contraction & nerve signaling
- Temperature regulation & endurance
- Sleep quality & recovery
- Skin health and overall cellular function
Even mild dehydration — as little as 1–2% of body mass loss — can lead to performance decrements, including impaired endurance and greater physiological strain.¹ Hypohydration (greater fluid loss) has also been shown to impair cognitive performance and mood during sustained heat and fluid loss conditions.²