When someone suddenly gains 9 kg in 2–3 months even after dieting, walking 6–8 km daily and having normal blood tests, it usually means the body has gone into **metabolic slowdown**. This happens after long or strict dieting. The body starts storing more fat even with less food, and weight comes back very fast.
It is not a disease and it does not show in
sugar,
thyroid,
liver or
kidney tests. It is a **metabolic adaptation** problem.
Other common reasons are low protein intake, stress-related hormones, poor sleep, long calorie restriction, or repeated dieting for many months. Even if she is eating very little, she can still gain because the body reduces metabolism to protect itself.
The solution is not more dieting. She needs a **reverse diet** for a few weeks, meaning slightly increasing calories in a controlled way, improving protein intake, adding strength-based home exercises and then restarting weight loss gradually. This method stops fast weight regain.
I can help guide her step by step and create a plan based on her current routine and eating pattern. Please consult me for a better solution.