This is another health clickbait headline, but it’s based on a real concept: the body can temporarily retain or lose fluid depending on diet, hormones, and lifestyle.
However, the “2.5 kg per day” claim is oversimplified and misleading. Body weight can fluctuate, but not in a fixed, predictable way for everyone.
💧 Why fluid retention happens
Common causes include:
- High salt intake (very common)
- Carbohydrate intake (glycogen stores hold water)
- Hormonal changes (especially in women)
- Long sitting or standing
- Heat and dehydration
- Certain medications
- blood pressure drugs
- steroids
- NSAIDs
⚖️ Why weight can change quickly
Sudden “weight gain” is usually:
- water + glycogen, not fat
- normal day-to-day fluctuation
It can go up or down depending on:
- meals
- salt intake
- sweating
- hydration
🧼 Safe ways to reduce excess fluid (if mild)
🥗 1. Reduce salt intake
- avoid processed foods
- limit salty snacks and packaged meals
💧 2. Stay hydrated
- drinking enough water actually helps the body release excess fluid
🚶 3. Move more
- walking improves circulation
- reduces swelling in legs
🍌 4. Eat potassium-rich foods (if medically safe)
- bananas
- spinach
- oranges
Helps balance sodium levels
🛌 5. Elevate legs (if swelling in lower limbs)
- helps fluid return to circulation
🚨 When to be concerned
See a doctor if fluid retention is:
- sudden and severe
- in the face, hands, or legs consistently
- accompanied by shortness of breath
- linked to heart, kidney, or liver issues
✔️ Bottom line
The body can fluctuate in water weight, but the “2.5 kg per day” idea is not a fixed rule. Most mild fluid retention is related to salt, diet, hormones, and lifestyle, and usually improves with simple changes.
If you want, I can explain:
- how to tell water weight vs fat gain, or
- foods that actually reduce bloating safely

