The Paleo Diet: A Review of Scientific Evidence
Introduction to Chronic Noncommunicable Diseases
A recent review aimed to evaluate the scientific evidence regarding the paleo diet and its impact on weight, Body Mass Index (BMI), and waist circumference. Chronic noncommunicable diseases are a leading cause of mortality and are a significant concern for global public health. In 2015, approximately 35 million deaths were attributed to these diseases, equating to nearly 60% of global mortality that year. If current trends persist, it is projected that chronic noncommunicable diseases will account for 73% of deaths by 2020.
Understanding Chronic Noncommunicable Diseases
The World Health Organization identifies several chronic noncommunicable diseases, including cardiovascular disease, cancer, diabetes, and chronic respiratory disease. These conditions are associated with lifestyle factors such as smoking, excessive alcohol consumption, insufficient fruit and vegetable intake, and high consumption of salt and sugar. Consequently, a nutritious diet is crucial for both the prevention and management of these diseases, while poor dietary choices can exacerbate them.
Diverse Dietary Approaches
Numerous diets have been proposed to address these health issues, aiming to either prevent or manage chronic diseases. Various food and nutrition organizations worldwide provide guidelines for healthy eating. However, alongside these recommendations, numerous “fad diets” proliferate across media channels. This raises the question of how much scientific backing exists for these diets and whether they might cause more harm than good.
The Paleo Diet Explained
The Paleo diet, inspired by the dietary habits of our ancestors from approximately 2.6 million to 10,000 years ago, has garnered significant attention as a fad diet. During this era, human diets were highly variable, influenced by a hunter-gatherer lifestyle and changes in geography and climate. Unlike contemporary diets, our ancestors did not consume dairy, salt, alcohol, sugar, cereals, or processed foods. Understanding these differences sheds light on why modern diets may contribute to chronic diseases.
Research on the Paleo Diet
The growing interest in the paleo diet has prompted numerous clinical trials aimed at evaluating its effectiveness in preventing and managing diseases. As part of their investigation, a group of researchers conducted a comprehensive review of the existing literature on the paleo diet. They identified 1,224 articles, from which 24 were initially selected. Upon further scrutiny, only 11 articles met the necessary criteria for inclusion in the final review.
Findings and Implications
The analysis of these 11 articles indicated that the paleo diet can facilitate an additional weight loss of approximately 3.52 kg compared to other recommended diets. Overall, the findings suggest a positive correlation between the paleo diet and improvements in weight, BMI, and waist circumference. This indicates that the paleo diet may serve as an effective strategy for preventing or managing various diseases associated with excess weight.
Conclusion and Future Research Directions
Despite the promising evidence regarding the paleo diet’s impact on weight and related health markers, the authors of the review caution that the findings are not definitive. They emphasize the need for additional clinical trials involving larger populations and extended durations to further substantiate the health benefits of this diet.
Reference
Almeida de Menezes, V. et al. 2019. Influence of Paleolithic diet on anthropometric markers in chronic diseases: systematic review and meta-analysis. Nutrition Journal volume 18, Article number: 41.
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