According to a meta-analysis published in The British Medical Journal, consuming plant protein reduces the risk of premature death from any cause. Researchers from Harvard University and Tehran University of Medical Sciences compared animal and plant protein intake and mortality from cancer, cardiovascular disease and other causes among 32 studies and a total of 715,128 participants. Each additional 3% of calories from plant protein, from legumes, grains and soy products, reduces the risk of death by approximately 5%. Consuming animal protein does not have similar properties. The authors suggest replacing animal protein with plant protein, indicating its relationship with longevity.

Source:

Naghshi S, Sadeghi O, Willett WC, Esmaillzadeh A. Dietary intake of total, animal, and plant proteins and risk of all cause, cardiovascular, and cancer mortality: systematic review and dose-response meta-analysis of prospective cohort studies. BMJ. 2020;370:m2412-m2429.

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