Your Brain Is Starving, and It's Not for Food

Your Brain Is Starving, and It's Not for Food

Author: Dr. Mercola July 22, 2026 Duration: 6:58
  • Your brain is about 75% water, and even mild dehydration slows focus, memory, reaction time, and mental clarity long before intense thirst appears
  • Researchers found that 56% of older adults in a two-year cognitive study were physiologically dehydrated, even though most consumed what guidelines considered enough water
  • Dehydration interferes with blood flow, oxygen delivery, and communication between brain cells, which contributes to brain fog, fatigue, irritability, and slower thinking
  • Drinking excessive amounts of plain water creates its own problems by diluting sodium and disrupting electrolyte balance, which lowers cellular energy production and worsens dehydration at the cellular level
  • Consistent hydration throughout the day, along with mineral-rich fluids, whole fruits, and electrolyte support during heavy sweating, helps your brain maintain sharper focus, steadier energy, and better long-term cognitive health

Each week, Dr. Joseph Mercola-Take Control of Your Health offers a direct conversation about navigating the often-confusing world of wellness. Dr. Mercola brings decades of experience as a natural health advocate to these discussions, focusing on practical strategies that go beyond conventional approaches. The episodes dig into the interconnected areas of holistic health, physical fitness, and alternative methods for building resilience. You’ll hear detailed explorations of how everyday choices impact long-term vitality, with an emphasis on personal agency and evidence-informed alternatives. This isn’t about quick fixes but about understanding the underlying principles that can help you make better decisions for yourself and your family. The tone is straightforward and investigative, aiming to equip you with knowledge that is frequently overlooked. Tuning into this podcast feels like accessing a deep resource of non-mainstream health perspectives, all centered on the fundamental goal of sustainable well-being. It’s for anyone who feels that managing their health requires looking at the full picture, from nutrition and movement to the less obvious environmental factors. Dr. Mercola’s weekly insights serve as a catalyst for taking a more active, informed role in your own health journey.
Author: Language: English Episodes: 50

Dr. Joseph Mercola - Take Control of Your Health
Podcast Episodes
Why Pills Don't Fit Modern Life: The Burden of Too Many Capsules [not-audio_url] [/not-audio_url]

Duration: 6:14
The morning handful of capsules is a holdover from a slower era — nearly every other part of daily life has been simplified, but the pill routine never was The sheer number of capsules required for some nutritional suppl…
Why Plain Water May Fall Short for Rehydration After Heavy Sweat [not-audio_url] [/not-audio_url]

Duration: 6:42
After heavy sweating, plain water doesn't fully replace what your body loses because sweat carries away sodium, potassium and other electrolytes that are necessary for proper hydration, muscle function and recovery In a…
An Arthritis Relief Strategy That Doesn't Come from a Pill Bottle [not-audio_url] [/not-audio_url]

Duration: 6:40
More than 53 million Americans live with arthritis, yet regular physical activity is considered one of the most effective non-drug strategies for reducing pain, improving mobility, and supporting independence — without r…
PCOS Has a New Name; Doctors Hope It Will Improve Care for Millions [not-audio_url] [/not-audio_url]

Duration: 6:48
Doctors officially renamed polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome (PMOS) because the old name focused too narrowly on ovarian cysts while ignoring the condition's widespread metaboli…