The Rina Diet: Complete Guide with 90-Day Menu and AI Alternatives
Everything you need to know about the Rina Diet: principles, detailed menu, benefits, risks, and why a personalized AI plan can be more effective.

In short
The Rina Diet promises results in 90 days by separating foods into categories. But does it really work? We analyze the principles, provide menu examples, and show you a more effective modern alternative.
What you will learn from this article
- 1The Rina Diet lasts 90 days with a repeating 4-day cycle
- 2Each day has a theme: proteins, starch, carbohydrates, or vitamins
- 3It has no solid scientific basis; the dissociation concept is unproven
- 4The risk of yo-yo effect is high after the 90 days end
- 5A personalized AI plan is more sustainable long-term
What Is the Rina Diet?
The Rina Diet, also known as the 90-day diet, is a dissociated diet originating from Slovenia that has become extremely popular in Eastern Europe.
The basic principle: separating foods into themed days to optimize digestion and metabolism. The 4-day cycle repeats for 90 days:
- Day 1 - Protein: meat, fish, eggs, dairy
- Day 2 - Starch: grains, potatoes, legumes
- Day 3 - Carbohydrates: pasta, bread, sweets (in moderation)
- Day 4 - Vitamins: raw fruits and vegetables
Every 29 days, a detox day is done (water or juices only).
Sample Menu for One Week
Day 1 - Protein
Breakfast: 2 boiled eggs, green tea
Lunch: 200g grilled chicken breast, green salad
Dinner: 150g baked fish, steamed vegetables
Day 2 - Starch
Breakfast: oatmeal porridge with cinnamon
Lunch: brown rice with sauteed vegetables
Dinner: baked potatoes with rosemary
Day 3 - Carbohydrates
Breakfast: toasted whole grain bread with honey
Lunch: whole wheat pasta with tomato sauce
Dinner: homemade pizza on thin crust
Day 4 - Vitamins
Breakfast: fresh fruit smoothie
Lunch: large salad with avocado and nuts
Dinner: raw vegetables with hummus
Advantages and Disadvantages of the Rina Diet
Potential advantages:
- Clear structure and easy to follow
- No obsessive calorie counting
- Encourages food variety
- Many users report weight loss
Disadvantages and risks:
- No scientific basis - the "dissociation" concept is not supported by studies
- Can lead to nutritional deficiencies - restriction by categories is artificial
- Yo-yo effect - many people regain weight after 90 days
- Not personalized - doesn't account for your individual needs
- Difficult to integrate socially - meals with friends become complicated
Why a Personalized AI Plan Is Superior
Instead of following a rigid diet that doesn't account for your lifestyle, food preferences, or activity level, FitAzi creates a fully personalized plan:
- Calories calculated precisely for your goal
- Optimized macronutrients for maintaining muscle mass
- Adapted recipes to your preferences (vegetarian, gluten-free, etc.)
- Flexibility - you can swap meals without ruining the plan
- Continuous adjustment - the AI learns from your progress
Result: sustainable weight loss, without the yo-yo effect and without artificial restrictions.
Frequently Asked Questions
Many people report losses of 10-20 kg in the 90 days. But be careful, a large portion can be water and muscle mass, not just fat. Plus, the risk of regaining the weight is high.
Ready to start your transformation?
Download FitAzi and get a personalized workout and nutrition plan, generated by AI in seconds.
Tags:
Maria Ionescu, CNS
Certified Nutritionist & Personal Trainer, specialized in personalized meal plans and body transformations
Article reviewed and verified by the FitAzi team
Related Articles

How to Lose Weight Healthily in 2026: A Complete Science-Based Guide
Want to lose weight but don't know where to start? This guide shows you step by step how to lose weight healthily, without extreme diets and without the yo-yo effect. Based on science, not myths.

Healthy Meal Planning: A Complete Meal Prep Guide
Meal prep means cooking once for the entire week. You save 5+ hours, eat healthier, and no longer have to think about what to cook every day. Here's how to get started.

Flexible Dieting (IIFYM) vs Rigid Diets: Which Is Better?
IIFYM means you can eat anything as long as you hit your macros. But is it really better than a structured diet? We analyze the advantages and disadvantages of each approach.