An analysis of 20 protein sources has identified a surprising victor: tofu. Research published in the journal Frontiers in Sustainable Food Systems introduced the BPI Score, where tofu scored 36 out of 40 points. This outperformed popular proteins like steak, salmon, and eggs. The assessment also placed beans, chia seeds, and quinoa in the top ranks, while foods like mozzarella, lamb, beef, and cheddar were rated lower.
The BPI Score was formulated by Chris Macdonald from the University of Cambridge and the Better Protein Institute. It evaluates protein sources on a 40-point scale, combining nutrition, affordability, availability, and environmental impact. Its ‘People Score’ considers sodium, saturated fat, cholesterol, essential amino acids, affordability, and availability. The ‘Planet Score’ assesses greenhouse gas emissions, water pollution, land use, and freshwater use.
Tofu’s rankings are compelling. Producing 100 grams of tofu protein is linked to 0.61 kilograms of greenhouse gas emissions, whereas beef totals 64.19 kilograms. Tofu also requires about 2 square meters of land per 100 grams versus 211 square meters for beef. This initial scoring relies on United Kingdom grocery data and compares protein provision rather than equal-sized portions.
According to fitness and nutrition expert Corry Matthews, consumers should assess protein quality alongside serving size and needs. “For instance, three ounces of cooked chicken breast offers around 26 grams of protein,” she stated. “A half cup of firm tofu delivers 10 to 15 grams, and two tablespoons of chia seeds provide around 4 to 5 grams.” Matthews pointed out that while chia seeds aren’t necessarily a primary protein source, they have their place in a balanced diet.
Animal proteins like eggs, dairy, fish, and lean meats provide complete protein with essential amino acids. Tofu also ranks as a complete protein, but plant-based diets may require careful planning for portion size and total intake.
Ashley Koff, a registered dietitian from Oregon, emphasized individual dietary preferences and digestion. “Many struggle with digesting tofu,” she mentioned, suggesting a focus on enjoyable and accessible protein sources.
Matthews advised against letting rankings dictate nutritional decisions. “Understand the scoring criteria and select foods that align with personal health objectives,” she recommended.