Tofu Ranks Highest in New Protein Source Analysis, Outperforming Beef and Salmon
A study evaluating nutrition, affordability, and environmental impact placed tofu above traditional animal proteins.
Tofu has emerged as the top-ranked protein source in a new analysis, surpassing traditional favorites like beef, salmon, and eggs. Beans, chia seeds, and quinoa also scored highly in the evaluation, which considered nutritional content, cost, and environmental footprint.
The "Better Protein Index" (BPI) Score, developed by researcher Chris Macdonald and the Better Protein Institute, rated 20 protein sources on a 40-point scale. Tofu achieved a score of 36 out of 40, leading the rankings.
The BPI Score assesses foods based on a "People Score" and a "Planet Score." The "People Score" incorporates factors such as sodium content, saturated fat, cholesterol, the presence of all nine essential amino acids, affordability, and availability. The "Planet Score" evaluates greenhouse gas emissions, water pollution, land use, and freshwater consumption.
According to the analysis, producing 100 grams of protein from tofu was associated with significantly lower environmental impact compared to beef. The study estimated 0.61 kilograms of greenhouse gas emissions for tofu versus 64.19 kilograms for beef. Land use was also substantially less, with tofu requiring approximately 2 square meters per 100 grams of protein, compared to about 211 square meters for beef.
Experts caution that the BPI Score is an initial scoring system based on U.K. grocery data and is not a formal dietary guideline. The ranking compares the amount of food needed to yield 100 grams of protein, rather than equal portion sizes.
Corry Matthews, a fitness and nutrition expert, emphasized that individual dietary needs and realistic consumption should guide protein choices. She noted that while tofu is a complete protein, smaller sources like chia seeds provide fewer grams of protein per serving. For instance, three ounces of cooked chicken breast offer approximately 26 grams of protein, whereas a half cup of firm tofu might provide 10 to 15 grams.
Ashley Koff, a registered dietitian, advised consumers to consider their personal digestion and preferences. "Many people do not digest tofu well at all," Koff stated, recommending that individuals choose protein sources they enjoy and can readily access. Both experts suggest that rankings should be a guide, but personal goals and dietary compatibility are paramount in making food choices.