Protein Sources Ranked: Tofu Tops the List

A recent analysis of 20 protein sources has revealed a surprising top scorer. Contrary to popular belief, the winner wasn’t steak, salmon, or eggs. It was tofu, a protein source often overlooked by many shoppers.

Researchers from the University of Cambridge, led by Chris Macdonald, introduced the BPI Score in a study published in the journal Frontiers in Sustainable Food Systems. The score evaluates 20 protein sources on a 40-point scale. The evaluation considers nutrition, affordability, availability, and environmental impact.

Understanding the BPI Score

The BPI Score consists of two components: the “People Score” and the “Planet Score.” The People Score factors in elements such as sodium, saturated fat, cholesterol, the presence of essential amino acids, affordability, and availability. The Planet Score assesses greenhouse gas emissions, water pollution, land use, and freshwater use.

Tofu’s Leading Score

In the analysis, tofu emerged as the highest scorer, achieving 36 out of 40 points. The study estimated producing 100 grams of protein from tofu resulted in 0.61 kilograms of greenhouse gas emissions. In contrast, beef production emitted 64.19 kilograms. Additionally, tofu used approximately 2 square meters of land, whereas beef required 211 square meters.

Other Highly Rated Foods

Beans, chia seeds, and quinoa also scored well, ranking among the top four. Meanwhile, mozzarella, lamb, beef, and cheddar received lower rankings. The BPI Score highlights the relative environmental and nutritional benefits of various protein sources.

“While acknowledging the limitations of this first iteration, the score provides a robust foundation for a more nuanced conversation,” Macdonald wrote.

Expert Opinions on Protein Choices

Corry Matthews, a California-based fitness and nutrition expert, emphasized that protein choices should align with personal goals and dietary needs. For instance, Matthews explained, “Three ounces of cooked chicken breast provides roughly 26 grams of protein. A half cup of firm tofu may provide around 10 to 15 grams.” Therefore, the choice of protein should reflect individual nutritional goals.

Registered dietitian Ashley Koff noted that individual tolerance and enjoyment of food are crucial when selecting protein sources. “Many people do not digest tofu well,” Koff explained. Thus, choosing protein sources should be a personalized decision based on one’s digestion and preferences.

“My advice? Don’t let a ranking do all your nutritional thinking for you,” Matthews added. “Understand what the ranking measures, then choose foods that support your actual goals.”

In sum, while tofu leads the BPI Score ranking, individual needs and preferences should guide protein choices to ensure nutritional adequacy.