Do you need electrolytes on a low-carb or keto diet?
This is the clearest case for supplementing, and the reason is physiological rather than promotional. When carbohydrate intake drops, insulin drops with it. Lower insulin signals the kidneys to excrete more sodium, and water follows the sodium out.
Why the first week feels bad
What people call keto flu, the headache, fatigue, light-headedness and muscle cramps of the first week, is largely sodium and fluid depletion rather than anything to do with ketones themselves. It is also why the same week often shows dramatic scale movement: much of it is water.
What to replace, roughly
- Sodium is the one that matters most and the one most people under-replace, because decades of public health messaging pushed the other direction.
- Potassium follows sodium losses. Vegetables, avocado and dairy help.
- Magnesium is commonly low in the general population regardless of diet, and low magnesium is associated with cramping and poor sleep.
A caveat worth stating
If you have high blood pressure, kidney disease or heart failure, or take medication affecting potassium, do not increase sodium or potassium without speaking to your doctor first. This advice is for otherwise healthy adults.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
