The Science of Electrolytes: More Than Just Salt Water

By Andrew – TFx Founder

Read time: 5 minutes

Most people think electrolytes are just for athletes or people who are sick. Wrong. Electrolytes are essential minerals that literally every cell in your body needs to function. And most of you aren't getting enough.

What Electrolytes Actually Do

Electrolytes are minerals that carry an electrical charge when dissolved in water. The big players: sodium, potassium, magnesium, calcium, and chloride. They regulate nerve function, muscle contraction, hydration, blood pH, and tissue repair.

When people say "drink more water," they're only telling half the story. Water follows electrolytes. If your electrolyte levels are low, water passes through you without actually hydrating your cells. You can drink a gallon of water and still be dehydrated at the cellular level.

Sodium: The Misunderstood Mineral

We've been told for decades that sodium is the enemy. For sedentary people eating processed food, excessive sodium IS a concern. But for active people who sweat regularly? Sodium restriction can actually hurt performance.

You lose 500-1,500mg of sodium per hour of intense exercise. A single training session can deplete 1,000-3,000mg. If you're not replacing it, you're experiencing fatigue, cramping, and reduced performance — and blaming your programming or motivation.

Active people need 3,000-5,000mg of sodium per day. Most sports drinks contain a laughable 200-300mg per serving. That's why we formulated TFx HYDRATE with meaningful amounts of sodium alongside potassium and magnesium.

Potassium: Sodium's Partner

Potassium and sodium work together to maintain fluid balance and nerve function. The ratio matters as much as the absolute amounts. Most Americans get far too much sodium relative to potassium (processed food is loaded with sodium and stripped of potassium).

Active people should aim for 3,500-4,700mg of potassium daily. Bananas get all the credit, but potatoes, avocados, spinach, and coconut water are better sources per serving.

Magnesium: The Recovery Mineral

Magnesium is involved in over 300 enzymatic reactions including protein synthesis, muscle and nerve function, and blood glucose control. About 50% of Americans are deficient. Symptoms of low magnesium: muscle cramps, poor sleep, anxiety, fatigue, and slow recovery.

Training depletes magnesium. Sweating depletes magnesium. Stress depletes magnesium. If you're active and stressed (so, everyone), supplementing with magnesium is almost always beneficial.

When to Take Electrolytes

Before training: Pre-loading with electrolytes 30-60 minutes before exercise improves hydration status and delays fatigue.

During training: Sip electrolytes throughout sessions lasting more than 30 minutes. Don't wait until you're thirsty — by then, you're already 1-2% dehydrated.

Throughout the day: Electrolytes aren't just for training. Your brain uses sodium and potassium for every thought. Your muscles need them for every contraction. Daily electrolyte intake supports energy, focus, and overall function.

Stop Guessing, Start Hydrating

Plain water is good. Electrolyte-enhanced water is better. A well-formulated electrolyte supplement like TFx HYDRATE gives your body what it actually needs to function at its best. Combine that with a strong nutritional foundation from TFx FOUNDATION and you've covered the basics that most people overlook.

Not perfect. Better. Not someday. Every day.

— Andrew, TFx Founder