Water makes up nearly 25% of each hair strand's weight. When you're dehydrated, your body prioritizes vital organs over hair follicles, potentially slowing growth and weakening existing strands. Here's how hydration impacts your hair—and how to optimize it.
The Science of Hair Hydration
Your scalp is skin, and skin needs moisture to function properly. Dehydration can lead to a dry, flaky scalp that creates a poor environment for hair growth. Blood flow to follicles depends on adequate hydration—when blood thickens from dehydration, nutrient delivery suffers.
The Target: Aim for 8-10 glasses of water daily, more if you exercise heavily or live in a dry climate. Your urine should be pale yellow—dark urine signals dehydration.
Beyond Water: Hydration Strategies
- Electrolytes matter: Sodium, potassium, and magnesium help your body retain and use water effectively
- Reduce dehydrators: Alcohol and excessive caffeine increase water loss
- Hydrating foods: Cucumbers, watermelon, and leafy greens contribute to your daily intake
- Timing: Sip throughout the day rather than chugging large amounts at once
Signs Your Hair Needs More Hydration
Dry, brittle strands that break easily. A scalp that feels tight or itchy. Hair that looks dull and lacks shine. Static and flyaways. These are signals your body—and your hair—need more fluids.
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