Everyone wants to lose weight "as fast as possible". The problem is that faster doesn't mean better - the steeper the course, the more often it ends in muscle loss, hunger and yo-yo rebound. Here's how much is actually worth losing per week and how to set a goal you'll keep.
A healthy rate of weight loss
A safe and effective range is roughly 0.5-1% of body weight per week. For an 80 kg person that's about 0.4-0.8 kg a week. The more you have to lose, the faster you can go at the start; the closer to shape, the slower and more careful. In practice, a sensible deficit is about 15-20% of your daily needs - enough to see results, gentle enough to sustain.
Why too fast backfires
Aggressive calorie cuts are tempting, but they carry real costs:
- Muscle loss - with a large deficit and no protein/training, you lose more than fat; your shape and metabolism suffer.
- Strong hunger and rebound - a draconian diet is unsustainable; the harder you push, the higher the risk of regaining.
- Deficiencies and well-being - too little food means too few vitamins, less energy and worse sleep.
- Higher risk of gallstones with very rapid weight loss.
The first weeks lie
At the start the scale often drops fast - and it's easy to get carried away. But that's mostly water and glycogen, not fat. After this effect the rate naturally settles to the real one. Don't set expectations based on week one.
How to set a realistic goal and date
Instead of "I want -10 kg by yesterday", do the math calmly: at 0.5-0.7 kg/week, 10 kg is roughly 4-5 months. A good journal will calculate a projected goal date from your real pace over recent weeks - a far healthier approach than a rigid, wishful deadline.
Slower usually means more lasting
The best diet is the one you can actually stick to. A slower pace fits life better, protects muscle and builds habits that remain after the diet ends. A quick sprint gives numbers on the scale but rarely a lasting result.
When the pace slows
The closer to your goal, the slower the kilos come off - and that's normal. At a lower weight your needs drop and the deficit shrinks. Instead of pushing harder, just be patient and watch the trend, not single days (more on that in other posts on the blog).
Summary
Aim for 0.5-1% of body weight per week, set a deficit of ~15-20%, don't be fooled by a fast start (it's water), and give yourself a realistic time horizon. Slower but smarter - that's the path you don't bounce back from.
In Kalori you log your weight, see your weight-loss pace and a projected goal date calculated from your last week - it's easier to keep a healthy course and not chase unrealistic deadlines. Everything stays on your phone, with no account.
This article is for informational purposes only and is not medical or dietary advice.