Does Alcohol Hydrate or Dehydrate? The Surprising ABV Tipping Point | Smartest Year Ever (May 14, 2025)

Ever wondered at what point alcohol goes from hydrating to dehydrating? 🍺 It turns out there’s an ABV tipping point where drinks stop being your friend and start drying you out. Gordy dives into the science behind beer, wine, spirits, and how alcohol affects hydration.

We’ll look at why sailors once drank low-alcohol “small beer” to stay hydrated, why modern drinks don’t do the trick, and how your cold post-run beer might be doing more harm than good. Plus, find out the exact ABV where hydration turns into dehydration.

🚨 Stay curious, stay clever—on our quest to become the world’s greatest conversationalists.

Sources:

• Maughan, R. J., et al. (2016). A randomized trial to assess the potential of different beverages to affect hydration status. American Journal of Clinical Nutrition, 103(3), 717–723. https://doi.org/10.3945/ajcn.115.114769
  

• Shirreffs, S. M., & Maughan, R. J. (1997). Restoration of fluid balance after exercise-induced dehydration: Effects of alcohol consumption. Journal of Applied Physiology, 83(4), 1152–1158. https://doi.org/10.1152/jappl.1997.83.4.1152
  

• Institute of Medicine (US) Panel on Fluid, Electrolyte, and Acid-Base Requirements. (2004). Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. National Academies Press. https://nap.nationalacademies.org/catalog/10925
  

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