"Prioritize resistance training over protein source for muscle A landmark unpublished study Hill previews — where elderly participants eating a vegan diet in real-world conditions ate less protein overall because plant foods were more satiating — found a telling result: 'when they added resistance training to it, even though the vegan group were consuming less protein, muscle size and strength was no different.' Hill's conclusion: 'it's much more about the resistance training than it is about a specific amount of protein intake, let alone the source of that protein.' For people in their 30s through 60s fixated on protein source for muscle protection, this reframes the priority order — confirming you do resistance training consistently is the highest-value intervention, while the animal-versus-plant debate is secondary. Source: Simon Hill, Rich Roll Podcast, 2025 Dietary Guidelines Deep Dive"