I used to chug Gatorade after every run. Blue flavor, the one that stains your tongue. Then I actually read the label: thirty-four grams of sugar per bottle. That is more than a Snickers bar. For a drink marketed as “health and performance.” I felt duped.

Turns out you can mix your own electrolyte drink at home for about fifteen cents per bottle. It has no artificial colors, no high-fructose corn syrup, and it actually replaces what you lose when you sweat.

What your body actually needs after sweating

Sweat contains more than just water. You lose sodium, potassium, magnesium, and calcium. Plain water rehydrates you but does not replace those minerals. If you drink a lot of water without electrolytes after heavy sweating, you can actually dilute your blood sodium levels — a condition called hyponatremia. It is rare but serious. The sports drinks have the right idea. They just buried it under a mountain of sugar.

The basic recipe

• 2 cups of water (filtered or tap, does not matter)
• ⅛ teaspoon of salt — regular table salt works, sea salt is slightly better for trace minerals
• 2 tablespoons of lemon or lime juice — fresh or bottled
• 1 tablespoon of honey or maple syrup — just enough carbs to help your body absorb the electrolytes faster

Shake it in a bottle. That is it. For a bigger batch, scale it up proportionally. I make a quart at a time and keep it in the fridge.

The upgraded version

If you want a more complete electrolyte profile, add these optional ingredients:

• A pinch of potassium chloride — sold as “NoSalt” or “Nu-Salt” in the spice aisle. This replaces the potassium you lose through sweat.
• A squeeze of magnesium citrate liquid — one teaspoon per quart. Helps with muscle cramps.
• A tiny pinch of baking soda — buffers the acidity and makes it taste smoother.

I skipped the baking soda the first time and the salt-lemon combination was a little harsh. A quarter teaspoon of baking soda per quart rounds out the flavor completely.

How it tastes

It tastes like barely-sweet lemonade with a hint of salt. Not like seawater. More like the way food tastes better with a pinch of salt. If it tastes salty, you used too much salt. If it tastes like lemonade, you used too much honey. Find your balance. My sweet spot is one tablespoon of honey and a scant eighth-teaspoon of salt per two cups.