Electrolytes, Hydration, and the Truth About Salt

Summertime (and heat) are right around the corner which means a lot of people are about to do one of two things: 

• Chug more water

• Add electrolytes to everything that has a lid

  
  

And neither one automatically fixes hydration. 

If you've ever worried about your hydration, you've probably heard things like:

“Drink more water!”

“Watch your sodium intake.”

“Just add some electrolytes.”

But here's the problem: most people don't know what electrolytes actually do, assume that all electrolyte drinks are the same, and think that salt is a problem. As a result, they often end up under-hydrated, over-restricting sodium when they don't need to, or using the wrong tools entirely.  Let's go to school and simplify this.

What Are Electrolytes (and Why Do They Matter?)

Electrolytes are minerals that help regulate fluid balance in your body. They play a role in hydration, muscle contraction, nerve signaling, and blood pressure. The main electrolytes are sodium, potassium, magnesium, and calcium. 

When we're talking about day-to-day hydration and fluid balance, sodium and potassium are the big players here. Magnesium and calcium matter a lot, just in a different way. They deal more with how your nerves, muscles, and blood vessels behave.

What You Typically Miss: It’s About Balance, Not Just Intake

Your body doesn't just care about how much water you have. It cares about where that water is in your body.  Sodium pulls water into your bloodstream. Potassium pulls water into your cells.

You need both to stay hydrated, maintain energy, and support normal blood pressure. If that balance is off, you can feel fatigued, get headaches, experience cravings, and just feel off even if you are drinking plenty of water.

Why Salt Gets Blamed (and What’s Actually True) 

We've all been told that salt raises blood pressure, so to eat less of it. There's some truth here, but it's incomplete. We do know that some individuals are more sensitive to sodium and that extremely high sodium intake can influence blood pressure. What's missing is that most people aren't eating high sodium because they are salting their food; they're eating processed foods, low-potassium diet, and nutrient poor meals (read: Not enough REAL WHOLE food and fruits & veggies!) 

So the real problem is often high sodium plus low potassium plus an overall poor diet and lifestyle. It’s NOT just “too much salt.” 

The Diet Shift That Changes Everything

When someone starts to improve their diet and eats more whole foods, lean proteins, fruits, and veggies, they often drastically reduce their sodium intake and increase their potassium intake. This sounds great, but here is what can happen next:

• Fatigue

• Headaches

• Low energy

• Increased cravings, especially for sugar

Why does this happen? Because they unintentionally went too low in sodium. On top of that, there's growing discussion around how low sodium intake can increase stress signals in the body. This may drive cravings, especially for sugar. Sometimes what feels like a sugar problem may actually be a low electrolyte problem.

But What About High Blood Pressure?

People assume that high blood pressure equals too much sodium, but blood pressure is influenced by many factors such as:

• stress

• body composition

• activity level

• sleep

• nutrition quality & quantity

• overall lifestyle 
  

Remember how we talked about sodium and potassium working to balance each other? 

In many cases it’s not just sodium that’s the problem it’s that we’re not balancing with enough potassium (and other factors of a healthy lifestyle). Potassium helps support fluid movement into the cells and helps blood vessels relax. Diets rich in potassium, like those with fruits, vegetables, and potatoes, are consistently associated with better blood pressure outcomes.

So What’s The Real Takeaway? 

Instead of being worried about how much sodium you’re consuming, a better question to ask yourself is “Is my sodium balanced with enough potassium and overall healthy habits?”

It’s not just about drinking more water either, true hydration is about water and electrolytes. 

Can Your Bloodwork Tell Your Hydration Status? 

Simple answer: Not well. And not on their own. 

Your body works very hard to keep electrolyte levels in your blood within a tight range. Even if your intake of electrolytes is low, or your hydration habits are inconsistent, your labs may still look normal. Your labs can be useful for extremes, but they aren’t a good determinant on their own for daily hydration needs. 

Can You Just Drink To Thirst? 

Your thirst signal can certainly be helpful, but it's not always reliable. It can lag behind your needs and become less sensitive as we age. Dehydration as an older adult can become extremely serious, so we cannot just depend on whether or not we feel thirsty. Relying on our thirst signals can often lead to:

• Underhydration

• Low energy

• Headaches or migraines

• Generally poor performance
  

Electrolytes do NOT equal Electrolytes

What makes up your electrolyte drink or powder matters.  We’re talking dosage and composition here. For example, LMNT is a high sodium electrolyte powder designed for training, sweating, and higher output lifestyles as well as people who have a higher salt need or potentially low blood pressure. Ultima, another popular “electrolyte” powder contains very low sodium and smaller electrolyte doses overall. These products are not interchangeable.

This is a very important distinction because if you're training regularly, sweating, and/or eating mostly whole foods, a lower sodium product may not support your performance, your hydration, or replace what you are potentially losing. On the flip side, if you are using a product thinking your bases are covered, or even potentially overdoing it with adding electrolytes to each cup you drink, you could be unintentionally harming your fluid balance. 

Let’s Get Practical: How to Actually Assess Your Hydration

Each person’s electrolyte needs will differ and this can change dramatically based on different seasons of health and life as well. 

Step 1: Look at your hydration demand & diet pattern: The following can potentially increase electrolyte need:

• High activity level

• Frequent headaches, cramps, or light-headedness

• Higher caffeine intake

• Travel

• Heat exposure

• Heavy sweating

• Higher activity level

• Low-carb or fasting

• A mostly whole foods diet

Note: The opposite of any of these can potentially decrease sodium need and increase potassium need. 

Step 2: Real-world feedback: Helpful Markers

• Symptoms: headaches, dizziness, fatigue and constipation may be related to low electrolytes & hydration status 

• Performance & Energy: workouts feel harder, recovery is worse, energy is low 

• Frequency: Peeing constantly can be a sign you’re not retaining fluid well

• Urine color (pale yellow although this can be influenced by supplements and sometimes medications so it’s not a great marker)

• Cravings: Salt cravings are often meaningful, and sugar cravings can sometimes be tied to low sodium/electrolytes. 
  

Step 3: A Practical Approach (That works for most people):

• Drink fluids consistently.

• Salt your food to taste, especially if active.

• Eat potassium-rich foods.

• Add electrolytes when you're sweating, training, and eating mostly whole foods.
  

Important note: If you happen to have uncontrolled high blood pressure, kidney disease, heart failure, if you're on diuretics or blood pressure medications, or if you have a history of electrolyte imbalances, don't self-prescribe high dose electrolytes. You need more guidance.

The Bottom Line

Hydration isn’t just about water. It’s about electrolyte balance and matching your intake to your lifestyle. More isn’t necessarily better, better balance is better. 

Want Help Personalizing This? 

If you're tired of guessing, especially if you're dealing with fatigue, headaches, stubborn cravings, and blood pressure concerns. This is exactly the kind of nuance I work through in my one-on-one coaching program. We look at your labs, your diet, your activity, your symptoms, and your goals and build a plan that actually fits your real life. If you're interested in checking it out, I'd love to chat!

Disclaimer: This content is for educational purposes only and is intended to support general health and nutrition understanding. It is not intended to diagnose or treat any medical condition.