Protein, Plants and Performance: What the Latest Science Is Saying

The intersection of plant-based eating and physical performance has become one of the most actively studied areas in nutrition science — and the findings are challenging old assumptions in both directions. The longstanding concern that plant-based athletes cannot consume adequate protein for performance and recovery has been largely addressed by evidence showing that plant protein sources, consumed in sufficient quantities and variety, can support athletic performance equivalent to omnivorous diets. Simultaneously, research is complicating the narrative that more protein is always better.

A comprehensive meta-analysis published in the British Journal of Sports Medicine in 2022 found that protein intakes above 1.62 grams per kilogram of body weight did not produce additional gains in muscle mass or strength in resistance-trained individuals — suggesting a ceiling effect for protein’s anabolic benefits. Below this threshold, more protein is beneficial; above it, the incremental benefit is minimal. This is important context for the high-protein marketing that dominates fitness culture.

The most compelling mid-2024 research continues to support the combination of adequate protein — from both animal and plant sources — with a diverse, fiber-rich dietary foundation. Athletes and active individuals benefit from emphasizing plant foods not just for protein but for the antioxidant and anti-inflammatory compounds that support recovery and long-term health. If you are an active person looking to optimize your nutrition, whether plant-based or omnivorous, our NutriGreene dietitians can help you build a science-backed performance nutrition plan.

Sources

• Morton RW, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52(6):376-384.

• Lynch HM, et al. No significant differences in muscle strength and hypertrophy between consuming a high- versus normal/low-protein diet in resistance-trained individuals: a scoping review. Nutrients. 2021;13(9):3151.

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