Lose weight fast: effective and safe methods

Discover scientifically proven strategies to lose weight quickly without compromising your health.
Image news Lose weight fast: effective and safe methods
May 30, 2025
8 min

Losing weight quickly is a goal shared by many people, often motivated by an upcoming event or a need for immediate transformation. While the promise is appealing, it requires following structured and effective methods to avoid the risks associated with extreme diets.

Understanding the basics of rapid weight loss

To lose weight quickly, the fundamental rule is simple: reduce calorie intake while meeting the body’s essential needs. The fewer calories you consume, the faster the weight loss. However, this must be done smartly to avoid deficiencies and fatigue.

  • A woman expending 2000 kcal/day will lose 3 kg/month on a 1400 kcal diet.
  • A 900 kcal diet can result in a 5 kg/month weight loss.
  • Intakes below 600 kcal must be strictly supervised medically.

Targeted reduction of carbohydrates and fats

One of the most effective ways to lose weight is to significantly reduce carbohydrates, especially fast sugars and starches. Some studies suggest that consuming fewer than 40 g of carbs per day maximizes weight loss. Reducing fats, which are high in calories (9 kcal/g), also promotes a faster energy deficit.

The role of physical activity in fast weight loss

Engaging in light physical activity like daily brisk walking can burn an additional 150 to 200 kcal. When combined with a controlled diet, this approach enhances weight loss without overly exhausting the body, especially during calorie restriction.

  • Walk 40 minutes daily at a brisk pace
  • Incorporate interval walking: 5 min normal, 1 min fast
  • Avoid intense activities if you feel tired

Two systems for very rapid weight loss

The ultra-restrictive protein diet

This approach is based on a high intake of lean proteins and very low calorie consumption. It is suitable for short-term emergencies under medical supervision.

  • 6 hard-boiled egg whites spread throughout the day
  • 2 fat-free dairy products (plain yogurt or cottage cheese)
  • Raw or cooked vegetables without oil, as much as desired
  • Lemon water and vegetable broths are allowed

The balanced low-calorie diet

Less strict than the previous option, this diet combines lean proteins, vegetables, and fat-free dairy products for a rapid yet easier-to-maintain weight loss approach.

  • Breakfast: plain yogurt + unsweetened coffee or tea
  • Lunch: raw vegetables without oil, grilled meat, steamed vegetables, yogurt
  • Dinner: same structure as lunch

Conclusion: effectiveness, yes — caution, always

It is possible to lose several kilos quickly by reducing calories, limiting carbohydrates, and staying active. However, these methods should be used occasionally and preferably under supervision. For lasting results, long-term dietary re-education is essential.

How can I lose weight quickly without compromising my health?

Moderately reduce calories, prioritize lean proteins, and engage in light physical activity like brisk walking.

Which diet can help me lose 5 kilos in one month?

A 900 kcal/day diet, high in protein and low in carbs, can lead to a 5 kg monthly weight loss if properly followed.

Do I need to cut out carbs to lose weight fast?

Significantly reducing carbs to under 40 g/day speeds up weight loss by affecting hormonal metabolism.

Can I exercise while on a strict diet?

Yes, but opt for moderate activity like walking to avoid excessive fatigue or injury.

Is a 600 kcal diet dangerous?

Yes, this type of diet should only be followed for a very short time and under medical supervision to prevent severe deficiencies.

Which foods are allowed in a rapid weight loss diet?

Egg whites, fat-free yogurts, oil-free vegetables, lean meats, unsalted broths, and unsweetened drinks.

How many kilos can you lose in a week?

Between 2 and 3 kg depending on the chosen diet, individual metabolism, and physical activity.

Should I consult a doctor before starting a fast weight loss plan?

Yes, especially if you have medical conditions or plan to follow a very restrictive diet.

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Sources

  • https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6520897
  • https://www.anses.fr/fr/content/avis-et-rapports-de-lanses-sur-la-nutrition
  • https://www.sciencedirect.com/science/article/abs/pii/S0002822315305786
  • De. Jean-Michel Cohen https://www.youtube.com/watch?si=sIcUdt64KzsNE1Fc&v=sZ8PBxnJ1jg&feature=youtu.be
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