More than half the content of the cells in your body are composed of water. If your water consumption is too low, your energy level will drop. Without it, you'll die. Water is so vital to enduring hot and humid weather that it seems wrong to call it a supplement. An essential would seem to be a better word.
But chronic dehydration is extremely common, particularly in the most intense environments, so supplementing would be an improvement. Adults need approximately 67.6 ounces (2 liters) of water per day. In muggy weather, the requirements go up. You can easily gauge if your body needs more water by examining the color of your urine. If it's clear, then you're treating your body right [source: Edwards].
- Bernhardt, Gale. "Cracking the Code on Sweat Rates." Active.com. (May 9, 2012) http://www.active.com/triathlon/Articles/Cracking-the-Code-on-Sweat-Rates.htm
- Eastman, Renee, M.B.S. "Water – The Super Supplement." (May 9, 2012) http://www.roadcycling.com/training/water.shtml
- Edwards, Tona, Dr. "The Pros and Cons of Dietary Supplements." Center for Integrative Medicine. 2011. (May 9, 2012) http://my.clevelandclinic.org/departments/integrativemedicine/newsletter/center-integrative-medicine-summer-2011.aspx
- The Free Dictionary. "Electrolyte Supplements." (May 9, 2012) http://medical-dictionary.thefreedictionary.com/Electrolyte+Supplements
- Hammer Nutrition. "The Top 10." June 2011. (May 9, 2012) http://www.hammernutrition.com/hnt/1273&OMI=&AMI=/
- Harrison, Alex Spc. "Hot Summer Months Mean Watching Diet, Exercise, Supplements." U.S. Army. May 30, 2007. (May 9, 2012) http://www.army.mil/article/3403/Hot_Summer_Months_Mean_Watching_Diet__Exercise__Supplements/
- McDonald, Alex, M. MD. "Sodium: A Closer Look." PowerBar. (May 9, 2012) http://www.powerbar.com/articles/47/sodium-a-closer-look.aspx
Regularly popping a fish oil supplement was once considered beneficial for cardiovascular health. A big 2018 meta-study challenges that assumption.