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Hydration & Electrolytes

Water supports virtually every system in the body. Here we explore how much we need, what changes those needs, the role of sodium and how to separate useful insights from overstated claims.

Corey’s note

Why this is included

This video helped spark our current community conversation about water and hydration. Dr Batmanghelidj made broad claims that go beyond established clinical evidence, but his central invitation—to take hydration seriously and notice the body’s signals—is worth exploring.

Inclusion here does not mean every claim is accepted without question. The useful task is to separate foundational physiology, practical observation and interesting hypotheses from claims that still need stronger evidence.

Established

Water is essential

It supports digestion, circulation, temperature regulation, kidney function and normal brain and muscle function.

Individual

Needs vary

Climate, activity, pregnancy, illness, diet, body size and sweat rate all affect fluid requirements.

Context matters

Sodium has a role

Sodium is essential for fluid balance, but more is not automatically better and individual losses vary widely.

Exploring

Symptoms are not diagnoses

Thirst, fatigue, headache or dry mouth may relate to hydration, but they can have many other causes.

Put it into practice

Find your everyday starting point

Our three-question guide translates Australian and New Zealand reference values into a practical bottle plan.

Open the Hydration Guide

Continue the conversation

What do you think?

Share your observations and questions with the Mental Wellness Hub.

Join the Mental Wellness Hub →