Question 1

Why do fasting and keto require more sodium than standard dietary advice?

Accepted Answer

When insulin falls — as it does during extended fasting or very-low-carb eating — the kidneys excrete significantly more sodium and water. Replacing roughly 3,000–5,000 mg of sodium per day in these states helps prevent the headaches, fatigue and dizziness often called "keto flu" or "fasting flu". This is higher than the standard population guidance of under 2,300 mg, which assumes a typical mixed diet.

Question 2

How much water should I drink on a GLP-1 medication?

Accepted Answer

A common baseline is 30–35 mL of fluid per kilogram of body weight per day — about 2.5 litres for a 75 kg adult — plus extra for exercise or sweating. GLP-1 medications blunt thirst and appetite, and nausea or vomiting can accelerate fluid loss, so steady, scheduled sipping throughout the day matters more than relying on thirst.

Question 3

Is it safe to supplement potassium?

Accepted Answer

Potassium is best obtained from food and low-dose electrolyte mixes. Unlike sodium, over-supplementing potassium can cause dangerous heart-rhythm problems, especially in people with kidney disease or on medications that affect potassium handling (ACE inhibitors, ARBs, potassium-sparing diuretics). Anyone in those groups should not follow generic potassium targets without clinician guidance.