Flexitarian diet

The flexitarian diet is a dietary pattern where the base is predominantly plant-based, with flexible and moderate inclusion of meat and animal products.

For a more in-depth review, see the complete guide to proper nutrition — a foundational guide from the expert team at Sport Zona.

What it is

The flexitarian (from "flexible" and "vegetarian") diet is a dietary regimen that emphasizes the consumption of plant-based foods as primary sources of energy and nutrients, without completely excluding meat and other animal products. It represents a more flexible version of vegetarianism, allowing for periodic or moderate inclusion of meat, fish, dairy products, and eggs. This approach does not impose strict limits or rules on the number of meat-containing meals, but instead encourages intuitive and conscious choices.

Biochemically, the flexitarian diet aims to optimize the intake of fiber, vitamins, minerals, and antioxidants from plant sources, while ensuring adequate amounts of protein and essential amino acids through a combination of plant and animal sources. This model is designed to make healthy eating more sustainable and accessible to a wider range of people, while offering the health benefits associated with increased plant-based food intake.

How it works

The flexitarian diet functions by gradually shifting the focus from meat to plant-based foods, without imposing absolute prohibitions. The main principle is to increase the consumption of fruits, vegetables, whole grains, legumes, nuts, and seeds, while meat remains an option, consumed in smaller quantities or less frequently. This model does not follow prescribed exact proportions or calorie intake, but encourages a holistic rethinking of dietary habits towards a more sustainable and balanced regimen.

Practical implementation may include:

• One or more meat-free days per week.
• Using meat as a seasoning rather than the main dish.
• Choosing products with a smaller environmental footprint when consuming animal products.
• Doubling the intake of diverse plant-based protein sources such as lentils, chickpeas, tofu, and quinoa.

In this way, the flexitarian diet allows for individual adaptation to personal preferences and needs, while ensuring nutritional density and variety.

Why it's important for athletes

For athletes, the flexitarian diet can offer significant advantages, combining the high nutritional density of plant-based foods with the ability to achieve optimal protein intake and essential micronutrients, which are often challenging in strictly vegetarian or vegan diets. For example, adequate protein intake is critical for muscle recovery and growth, with general recommendations for athletes ranging between 1.2 to 2.0 grams of protein per kilogram of body weight per day. The flexitarian approach makes it easier to reach these levels by combining efficient plant-based proteins with moderate amounts of high-quality animal proteins such as meat, fish, and dairy products.

In addition to protein, the flexitarian diet supports the intake of important micronutrients such as iron, zinc, calcium, and vitamin B12, which are essential for energy metabolism, bone density, and healthy nervous system function in athletes. Although plant-based iron sources (e.g., lentils, spinach) are less bioavailable than animal sources (heme iron), the flexitarian approach allows for the inclusion of red meat to prevent deficiency. Vitamin B12, which is found almost exclusively in animal products, is easily provided through periodic consumption of meat or dairy products, eliminating the need for supplements that are often necessary in a purely vegan diet.

Related concepts

• Vegan Protein Plan — This plan offers a strict plant-based approach to protein intake, unlike the flexibility of the flexitarian diet.
• Mediterranean Diet — Shares similarities in its focus on plant-based foods but traditionally includes more fish and seafood, without aiming to reduce meat in the same way.
• Paleo Diet — Emphasizes the consumption of meat, fish, eggs, and vegetables, while excluding grains and legumes, making it quite different from the flexitarian focus.
• Keto Diet — Characterized by very low carbohydrate, high fat, and moderate protein content, representing a fundamentally different metabolic approach compared to the flexitarian diet.