Tofu: The Top-Rated Protein for Health and the Planet, Study Finds

• Tofu ranks highest in the new BPI Score index, scoring 36 out of 40 points for combined environmental and health impact.
• The top 20% of protein sources identified are exclusively plant-based, while the lowest 20% are exclusively animal-based.
• Developed by the Better Protein Institute at the University of Cambridge, the index aims to replace incomplete single-factor labeling systems.

Environmental Assessment

• Impact is measured by greenhouse gas emissions, water pollution, water consumption, and land use, normalized by protein content.
• Tofu requires 2.16 square meters of land per 100g of protein, compared to 211.38 square meters for beef.
• Plant-based proteins consistently outperform animal-based products across all environmental metrics.

Health and Accessibility

• Health metrics evaluate sodium content, saturated fats, cholesterol, and nutritional completeness.
• Practical metrics consider affordability and supermarket availability in the UK.
• Plant-based foods consistently recorded zero cholesterol, whereas animal products showed significant variability.

Study Limitations

• The study excludes the "opportunity cost" of land use; reforesting land currently used for animal agriculture could capture over 500 billion tons of CO2.
• Ethical considerations regarding animal welfare were omitted due to quantification difficulties.
• Data is limited by its reliance on a single UK supermarket chain and a coarse five-level scoring scale.