In a review of 27 studies about the effects of a plant-based diet, researchers found robust evidence of beneficial effects of a plant based diet.

Medawar, E., Huhn, S., Villringer, A. et al. The effects of plant-based diets on the body and the brain: a systematic review. Transl Psychiatry9, 226 (2019). https://doi.org/10.1038/s41398-019-0552-0.

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