In a world where diet trends continue to evolve, identical twins Hugo and Ross Turner decided to embark on a unique experiment that would compare the impacts of two contrasting diets on their health and fitness. As twins with genetically identical DNA, they offered the perfect candidates for this study, aiming to explore the differences between a vegan diet and an omnivorous diet. This 12-week experiment, conducted between January and March 2020, involved maintaining the same fitness training program, ensuring that their diet was the only variable affecting the results.
The Motivation Behind the Experiment
Hugo and Ross Turner, known for their adventurous spirit, took on a dietary challenge that would test the effects of food choices on performance, health, and physical appearance. With the growing popularity of plant-based diets among athletes and increasing interest in documentaries like The Game Changers, the twins saw an opportunity to investigate the potential health benefits of veganism. At the same time, they wanted to understand how a traditional omnivorous diet would compare in terms of athletic performance and overall health.
Their approach was meticulous. Both twins followed a similar workout regimen designed by Ross, who is a personal trainer. The workout consisted of endurance training, conducted five to six days a week. For their nutrition, the twins used Mindful Chef’s delivery service, which ensured they were consuming nearly identical calories every day. While Hugo adhered to a vegan diet, Ross stuck to an omnivorous one. Throughout the experiment, researchers from King’s College, London, closely monitored their weight, cholesterol levels, muscle mass, and other key health metrics to determine how the two diets influenced their well-being.

Advantages of a Vegan Diet
A vegan diet, rich in whole foods such as fruits, vegetables, legumes, whole grains, nuts, and seeds, has been widely recognized for its numerous health benefits. Studies show that plant-based diets are linked to a lower risk of heart disease and other chronic health issues. These diets are typically low in saturated fats but high in heart-healthy fats and dietary fiber, which can help reduce cholesterol levels and improve overall heart health.
In fact, several studies have demonstrated that individuals following a vegan or vegetarian lifestyle tend to have lower blood pressure and LDL (bad) cholesterol levels compared to those who consume meat. Additionally, a well-structured vegan diet can help regulate blood sugar levels and reduce inflammation, which are crucial factors for maintaining long-term health.
Another important aspect of a vegan diet is its antioxidant content. Plant-based foods provide essential vitamins, minerals, and phytochemicals that support the body’s immune system and help protect against disease. The combination of these nutrients makes vegan diets a powerful tool in reducing the risk of various diseases, including heart disease and diabetes.
It’s important to note, however, that vegans often lead healthier lifestyles overall, with more physical activity and reduced alcohol consumption, which could contribute to their better health outcomes.
The Turner Twins’ Results
As the weeks passed, Hugo and Ross observed several changes in their health and fitness. Hugo, who adopted the vegan diet, experienced an increase in energy levels during his workouts. He reported feeling more mentally focused and was able to push through his gym sessions with improved stamina. His dietary shift included replacing processed snacks like biscuits and chips with healthier options such as fruits and nuts, both vegan-friendly foods.
Perhaps one of the most noticeable changes Hugo experienced was a reduction in weight and body fat percentage. Starting the experiment at 185 pounds with 13% body fat, Hugo dropped to 181 pounds by the end of the 12 weeks. His body fat percentage also decreased to 12%, a remarkable improvement. Additionally, Hugo’s cholesterol levels decreased, which is in line with research showing the benefits of plant-based diets on cardiovascular health.
However, the vegan diet did have its downsides. Hugo experienced a decrease in libido during the experiment, a side effect that is often discussed by those transitioning to plant-based diets. While not a universal experience, it’s something that should be considered when switching to a vegan lifestyle, particularly for those with specific dietary needs.
Ross, who followed an omnivorous diet, experienced different results. Starting off slightly bigger than Hugo, Ross gained 10 pounds of muscle throughout the experiment, which was an expected result given his protein intake from animal products. However, this muscle gain was accompanied by an increase in fat, raising his body fat percentage to 15%. Unlike Hugo, Ross’s cholesterol levels remained consistent throughout the experiment, showing no significant changes.
Key Differences and Insights
The Turner twins’ results highlight the significant impact that diet can have on physical performance and health. While both Hugo and Ross followed rigorous fitness routines, their diets played a central role in their overall outcomes.
- Vegan Diet:
- Hugo experienced improved energy levels and mental clarity.
- He lost weight and reduced his body fat percentage.
- Hugo’s cholesterol levels dropped, aligning with research showing the cardiovascular benefits of plant-based diets.
- The downside: Hugo experienced a decrease in libido, a common but not universal side effect of a plant-based diet.
- Omnivorous Diet:
- Ross gained muscle mass but also experienced an increase in body fat, leading to a rise in his body fat percentage.
- His cholesterol levels remained stable, which suggests that an omnivorous diet does not necessarily lead to negative cholesterol changes if balanced properly.
- Ross’s results also demonstrate that an omnivorous diet can support muscle gain, which may be beneficial for athletes focused on strength training.
Making the Right Choice for Your Health
The Turner twins’ experiment demonstrates that both vegan and omnivorous diets have their benefits and drawbacks. While vegan diets may promote weight loss, lower cholesterol, and better cardiovascular health, they may not be ideal for everyone, especially in terms of certain nutrients like protein and fat. On the other hand, an omnivorous diet can support muscle growth and strength, but it may lead to increased fat intake if not properly managed.
Ultimately, the best diet depends on individual goals, lifestyle, and health conditions. For those interested in a plant-based lifestyle, it’s crucial to plan the diet carefully to ensure it meets all nutritional needs. Similarly, those who follow an omnivorous diet should focus on balancing their food choices to avoid excess fats and cholesterol.
Conclusion
Hugo and Ross Turner’s 12-week experiment comparing a vegan diet to an omnivorous diet offers valuable insights into how these two diets affect health and fitness. Both diets have their advantages and challenges, and the results of the experiment show that the right diet largely depends on personal health goals and preferences. Whether you choose to follow a vegan diet for its cardiovascular benefits or opt for an omnivorous diet for muscle gain, understanding the impact of each on your body is key to making the right dietary choice.
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By understanding the science behind different diets, you can make more informed decisions to support your health and well-being.