"Keto & Colorado Altitude: Why You’re Always Thirsty"

By Franklin Everett Shaw

March 1, 2026

Ever feel like you’re perpetually parched, even after chugging water, especially since starting keto? If you’re doing keto in Colorado, particularly in cities like Denver or Boulder, that thirst is amplified. It’s not just your imagination; the combination of ketosis and high altitude creates a perfect storm for dehydration and electrolyte imbalances.

Let’s dive into why this happens and, more importantly, what you can do about it.

Ketosis, the metabolic state where your body burns fat for fuel instead of carbohydrates, inherently leads to increased water loss. When you restrict carbs, your body depletes its glycogen stores. Glycogen, stored in your muscles and liver, binds to water. As glycogen is used up, that water is released and flushed out through urine.

This is why many people experience rapid weight loss in the initial stages of keto – it’s largely water weight.

Now, add Colorado’s high altitude to the mix. Denver, the “Mile High City,” sits at 5,280 feet above sea level. Boulder is even higher, nestled against the foothills of the Rocky Mountains. At these altitudes, the air is thinner and drier.

Lower air pressure means your body loses water faster through respiration. You’re breathing more rapidly and deeply, trying to get enough oxygen, which leads to increased water vapor exhalation. The dry air further exacerbates this water loss.

The result? A double whammy of dehydration.

This dehydration isn’t just about feeling thirsty. It throws your electrolyte balance completely out of whack. Electrolytes like sodium, potassium, and magnesium are crucial for nerve function, muscle contraction, and fluid balance. When you lose water, you also lose these vital minerals.

Symptoms of electrolyte imbalance can include muscle cramps, fatigue, headaches, dizziness, and even heart palpitations. Not fun, especially when you’re trying to enjoy the Colorado lifestyle.

So, how do you combat this intensified dehydration and electrolyte imbalance while doing keto in Colorado? Here’s a step-by-step guide:

Step 1: Calculate Your Personalized Fluid Needs.

Forget the generic “drink eight glasses of water a day” advice. Your fluid needs are unique and depend on your activity level, body weight, and the altitude you’re at. A good starting point is to aim for at least one gallon (128 ounces) of water per day.

However, a more precise calculation involves multiplying your weight in pounds by 0.67. This gives you the minimum number of ounces of water you should consume daily. If you’re active, add another 12-20 ounces for every 30 minutes of exercise.

For example, a 150-pound person should aim for at least 100 ounces of water daily (150 x 0.67 = 100.5). If they exercise for an hour, they should add another 24-40 ounces.

Step 2: Strategically Replenish Electrolytes.

Water alone isn’t enough. You need to actively replenish the electrolytes you’re losing. Here’s a breakdown of key electrolytes and how to get them:

• Sodium: This is the most crucial electrolyte to focus on, especially on keto. Don’t be afraid to salt your food liberally. Add a pinch of sea salt or Himalayan pink salt to your water. You can also consume bone broth, which is naturally rich in sodium.
• Potassium: This electrolyte is often deficient on keto. Good sources include avocados, spinach, and mushrooms. However, it can be challenging to get enough potassium from food alone. Consider a potassium supplement, but be cautious with the dosage. Too much potassium can be dangerous. Look for potassium chloride or potassium citrate supplements.
• Magnesium: Magnesium deficiency is common, even outside of keto. It’s essential for muscle function and sleep. Good food sources include almonds, pumpkin seeds, and dark chocolate (in moderation, of course!). A magnesium supplement, such as magnesium citrate or magnesium glycinate, can be beneficial.

You can find electrolyte supplements readily available at local stores like King Soopers, Sprouts, and Whole Foods in Denver and Boulder. Look for products specifically designed for keto dieters, as they often contain the optimal ratio of electrolytes. LMNT and Keto Chow Electrolyte Drops are popular choices.

Step 3: Acclimatize Gradually.

Don’t jump into both keto and high altitude simultaneously. Give your body time to adjust to each change separately. If you’re new to Colorado, spend a few days acclimatizing to the altitude before starting keto.

Similarly, if you’re new to keto, start slowly and gradually reduce your carbohydrate intake. This will minimize the initial water loss and electrolyte imbalance.

Step 4: Monitor Your Urine Color.

Your urine color is a simple but effective indicator of your hydration status. Aim for pale yellow or clear urine. Dark yellow urine indicates dehydration.

Step 5: Listen to Your Body.

Pay attention to your body’s signals. If you’re experiencing symptoms of dehydration or electrolyte imbalance, such as muscle cramps, fatigue, or headaches, increase your fluid and electrolyte intake.

Common Pitfalls and How to Overcome Them:

• Over-reliance on sports drinks: Many sports drinks are loaded with sugar, which is a no-no on keto. Opt for sugar-free electrolyte drinks or make your own by adding a pinch of salt and a squeeze of lemon to water.
• Ignoring sodium intake: Many people are afraid of sodium, but it’s crucial on keto, especially at high altitude. Don’t be afraid to salt your food liberally.
• Not adjusting fluid intake based on activity level: If you’re hiking, skiing, or engaging in other strenuous activities, you’ll need to increase your fluid and electrolyte intake accordingly.
• Assuming all electrolyte supplements are created equal: Read the labels carefully and choose supplements that contain the right ratio of electrolytes for keto. Avoid supplements that are high in sugar or artificial sweeteners.
• Forgetting about electrolytes in food: While supplements can be helpful, don’t neglect food sources of electrolytes. Incorporate plenty of electrolyte-rich foods into your diet.

Real-World Scenario:

Imagine you’re a Denver resident who recently started the keto diet and enjoys hiking in the Rocky Mountains. You’ve been experiencing frequent muscle cramps and fatigue, even though you’re drinking plenty of water.

By following the steps outlined above, you can calculate your personalized fluid needs, replenish electrolytes with a combination of supplements and food, and adjust your intake based on your activity level. You can also monitor your urine color to ensure you’re adequately hydrated.

By proactively addressing the intensified dehydration and electrolyte imbalance caused by keto and high altitude, you can enjoy the benefits of the keto diet without sacrificing your health and well-being. You’ll be able to conquer those Colorado trails with energy and vitality.

Don’t let dehydration derail your keto journey in Colorado. Be proactive, stay hydrated, and listen to your body. You’ll be amazed at how much better you feel.