Protein diet 5 kg in 1 week: your detailed menu (and what you really need to know)

Are you looking for a quick solution to restart your weight loss, without getting into endless calculations or suffering from hunger? The protein diet is recognized for its effectiveness from the very first days. But beware of unrealistic promises. Before discussing the menu, let's lay the foundation to move forward quickly, well, and without risk for permanent results.

The promise is tempting. Losing 5 kilograms in one week seems like the perfect shortcut. In reality, it is rarely real fat loss. Such a drop on the scale most often corresponds to water loss and glycogen reserves.

Like a sponge that is squeezed too hard, the body can react brutally if subjected to excessive restriction. Without supervision, this can be dangerous and promote the yo-yo effect.

Remember: losing 5 kilograms in 1 week is neither the goal nor the recommendation of the Cétofine 21 method.

At Cétofine 21, we favor a fast but safe approach. On average, customers lose around 2 kilograms the first week during Level 1.

This variation depends on several factors: body type, metabolism, diet history, activity level. Like two different engines consuming the same fuel, each body responds at its own pace.

This initial loss is already very motivating and above all compatible with permanent weight loss.

Level 1 corresponds to the strict protein diet. It is the shortest phase, but also the most strategic. It triggers ketosis, the mechanism by which the body uses fat as fuel.

This menu is 100% compliant with Cétofine 21 Level 1. It deliberately excludes cookies, bars, bread, and fruits.

Good to know: days and flavors can be freely interchanged. The important thing is to respect the number of high-protein sachets (5 per day) and the authorized vegetables.

High-protein drinks

These products form the basis of your breakfasts and snacks. They provide high-quality protein while facilitating ketosis. There are many other protein-rich drinks available.

Products used in the menu:
Hot cocoa drink, cappuccino and macchiato, Cétofine 21 orange juice

Protein desserts & sweet treats

Perfect for snacks, these desserts help you stay full without frustration, while strictly respecting the protein diet.

Products used in the menu:
Protein dessert creams, vanilla flans, chocolate desserts, vanilla, chocolate-hazelnut, pancakes, chocolate fondant

Omelets, soups & high-protein savory preparations

They make up most of your lunches and dinners. Combined with authorized vegetables, they form complete, satisfying meals compatible with Phase 1.

Products used in the menu:
Protein omelets, high-protein soups, and other savory preparations to cook like cheese soufflé.
We offer a savory variety pack, a box of 7 high-protein sachets including 5 soup recipes and 2 omelet recipes.

Authorized protein snacks

Used occasionally, these products add a delicious touch while respecting the protein balance of the program. 

Products used in the menu:
Chocolate bars, dark chocolate/hazelnut bars.

Fresh vegetables to combine (to be purchased separately)

Vegetables complete your savory meals. They should be chosen from the list of vegetables authorized in Phase 1, following the recommended quantities.

Examples in the menu:
Zucchini, broccoli, spinach, green beans, lettuce, mushrooms, cauliflower, green cabbage, asparagus, watercress.

Did you know?

Proper hydration (1.5 to 2 L of water per day) amplifies weight loss, supports the kidneys during ketosis, and reduces fatigue in the first few days.

By almost completely eliminating carbohydrates, the body has no choice but to draw on its reserves. It's like forcing a GPS to take a new route: the metabolism adapts and burns stored fat.

Cétofine 21 high-protein sachets are formulated to maintain this state without deficiency.

Unlike conventional diets, muscle mass is preserved here. Proteins act as armor, preventing the body from using muscles as an energy source.

Result: a firmer silhouette, not just a lower number on the scale.

This week is only a starting point. To avoid the yo-yo effect, the Cétofine 21 method is based on 4 progressive phases.

• Phase 1: rapid activation of weight loss

• Phase 2: gradual reintroduction of natural proteins

• Phase 3: controlled transition with regulated reintroduction of carbohydrates

• Phase 4: long-term weight stabilization

To maximize your results and secure your weight loss, this menu is part of the Cétofine 21 high-protein method, structured in 4 progressive phases.

To understand the authorized foods better, check out our detailed guide on vegetables allowed during the high-protein diet.

To learn more about this key phase, discover the complete workings of Phase 1: the strict protein diet.

Find the entire method on the Cétofine 21 high-protein diet Method page.

Wanting to lose 5 kilos in 1 week is understandable. But aiming for a realistic loss of 2 kilos from the first week, following Cétofine 21 Phase 1, is much more effective in the long term. Be sure to continue the program to avoid the yo-yo effect.

This protein menu is your springboard to permanent weight loss, without hunger or frustration. The key to success remains consistency and adherence to the phases.