Popeye was right about spinach: dark green, leafy vegetables are the healthiest food on the planet. As whole foods go, they offer the most nutrition per calorie.

This quote by physician and nutrition expert Michael Greger emphasizes the exceptional health benefits of dark green, leafy vegetables, such as spinach. By referencing the cartoon character Popeye, who famously gained strength from eating spinach, Greger uses a familiar cultural icon to highlight a scientific truth: these vegetables are incredibly rich in nutrients. His statement affirms that Popeye’s love for spinach wasn’t just fiction—it reflects real nutritional value.

Greger points out that, among whole foods, leafy greens offer the most nutrition per calorie, making them an essential part of a healthy diet. This means they are low in calories but high in vital nutrients like vitamins A, C, K, folate, iron, calcium, and antioxidants. Because of this dense nutritional profile, these foods support immune function, reduce inflammation, and lower the risk of chronic diseases.

The origin of this quote lies in Greger’s extensive work promoting plant-based nutrition, particularly through his book How Not to Die and his nonprofit platform NutritionFacts.org. As a strong advocate for disease prevention through diet, Greger often highlights the power of nutrient-rich foods like leafy greens. His playful reference to Popeye bridges pop culture and science, making the message about healthy eating both accessible and memorable.