Electrolytes Explained
The complete reference for sodium, potassium, magnesium and hydration — why they deplete during weight loss, fasting and GLP-1 medication use, what each deficiency actually feels like, and exactly how to fix it.
Electrolytes are the most overlooked variable in weight loss. They are not glamorous, they don’t show up on the scale, and the symptoms they cause — headache, dizziness, fatigue, cramps, poor sleep — are so commonly misattributed to “just dieting” that most people never identify the actual cause. In many cases the fix takes less than a day.
The eleven articles in this cluster cover every dimension of electrolyte management for people losing weight — what each electrolyte does, why a calorie deficit depletes them, what deficiency in each one actually feels like, and the specific situations (fasting, GLP-1 medications, exercise) that change the picture. Use the map below to find where to start.
Sodium, potassium, and magnesium are usually depleted together during a calorie deficit, not in isolation. Most symptoms resolve fastest with a combined daily approach — bone broth, potassium-rich food, and magnesium glycinate — rather than chasing one electrolyte at a time.
Find the Right Starting Point
Match your situation to the card that fits.
The Three Electrolytes at a Glance
Headache, dizziness, days 1-10
Lost through glycogen depletion and lower insulin in the first 1-2 weeks of any deficit. Resolves in 30-60 minutes with bone broth or salted water.
Sodium →Weakness, cramps, weeks 1-2
Follows sodium loss and narrowed vegetable intake. A banana alone rarely corrects real deficiency — needs avocado, lentils, or leafy greens.
Potassium →Poor sleep, anxiety, weeks 2-6
Depletes slowest through narrowed food variety. Magnesium glycinate before bed is the single most evidence-backed fix during a deficit.
Magnesium →All 11 Articles in This Cluster
Electrolytes Explained
The complete reference for sodium, potassium, magnesium and hydration — what each one does and why they matter for weight loss.
Read more →Electrolyte Imbalance Symptoms
Headaches, cramps, dizziness — the specific symptom pattern for each electrolyte and how to tell them apart.
Read more →Sodium Deficiency Symptoms
Why sodium depletes within the first week of any diet — the glycogen and insulin mechanisms, and the fastest fix.
Read more →Potassium Deficiency Symptoms
Genuine muscle weakness, calf cramps and palpitations — and why a banana alone won’t fix real deficiency.
Read more →Magnesium Deficiency Symptoms
Poor sleep, anxiety, muscle twitching — the symptoms most people blame on everything except magnesium.
Read more →Magnesium and Weight Loss
The broader research picture — magnesium’s role in insulin sensitivity, sleep, and metabolic health during fat loss.
Read more →Electrolytes During Weight Loss
Why a calorie deficit depletes electrolytes faster than almost any other situation, with the daily protocol that prevents it.
Read more →The Dangers of Fasting Without Electrolytes
What actually happens to sodium, potassium and magnesium during intermittent and extended fasting — and the risks of getting it wrong.
Read more →Best Electrolytes for GLP-1 Users
Why Ozempic, Wegovy and Mounjaro create compound depletion, and the daily protocol that clears the symptoms it produces.
Read more →Electrolytes vs Water
Why drinking more water often fails to fix dieting symptoms — and the rare case where too much water becomes dangerous.
Read more →Best Electrolyte Drinks for Weight Loss
What to look for in an electrolyte drink during a deficit, and the formulations that avoid unnecessary sugar.
Read more →Where Electrolytes Connect
Electrolyte depletion is rarely an isolated issue — it overlaps heavily with fatigue, metabolic adaptation, and protein intake. These are the clusters to read next depending on what the guides above point to.
Fatigue & Energy Hub
Electrolyte depletion is one of seven causes of diet fatigue — see the full diagnostic picture and the other six.
Metabolic FoundationsMetabolic Adaptation Hub
When symptoms persist despite electrolyte correction, progressive metabolic adaptation may be the underlying cause.
Muscle & ProteinProtein Foundations Hub
Protein and electrolyte intake are both casualties of appetite suppression — this hub covers requirements and sources in full.
Free Tools
GLP-1 Protein Calculator
Daily protein target on medication — closely linked to mineral intake since both depend on consistent eating.
CalculatorCalorie Calculator
Identifies if your deficit is too aggressive — a key driver of how fast electrolytes deplete.
GuideHow Much Water Should You Drink?
The hydration target that works alongside — not instead of — electrolyte replacement.
Frequently Asked Questions
Sodium, potassium, and magnesium are the three most commonly depleted during a calorie deficit. Sodium depletes fastest through glycogen loss and reduced insulin signalling. Potassium follows through osmotic coupling and reduced vegetable intake. Magnesium depletes more slowly through narrowed food variety. A daily combination of bone broth, potassium-rich foods, and magnesium glycinate addresses all three. See: Electrolytes During Weight Loss.
Headache at the base of the skull and dizziness on standing point to sodium. Muscle weakness, severe calf cramps, and constipation point to potassium. Poor sleep, anxiety, and muscle twitching point to magnesium. Most people are low in more than one simultaneously, which is why a combined approach works better than targeting one alone. See: Electrolyte Imbalance Symptoms.
Food-based replacement is safe for daily use for almost everyone. Sodium and potassium are best obtained through food — potassium supplementation carries cardiac risk at high doses without medical supervision. Magnesium glycinate is the one supplement with consistent evidence for daily use during a deficit. People on diuretics, ACE inhibitors, or with kidney conditions should consult a healthcare provider before changing intake significantly.