Biologist Says 1.2-1.6 g/kg Protein Needs Resistance Training, Not $20 Billion Marketing
Updated
Updated · The Conversation · Aug 21
Biologist Says 1.2-1.6 g/kg Protein Needs Resistance Training, Not $20 Billion Marketing
2 articles · Updated · The Conversation · Aug 21
Summary
A biologist argues the protein boom mixes solid nutrition science with overblown marketing, saying added protein alone will not build muscle without resistance training.
January 2026 U.S. guidance raised the adult protein recommendation from 0.8 grams per kilogram to 1.2-1.6 grams, but the report says many healthy U.S. adults already consume enough.
A 2021 clinical trial found older adults improved muscle size, strength and function only when higher protein intake was paired with heavy resistance training.
The $20 billion protein-powder market and protein-fortified packaged foods can help some people, including some GLP-1 users, but may add sugar, salt or saturated fat and lack the broader nutrition of whole foods.
The broader takeaway is that protein matters for muscle, nerves, immunity and healthy aging, but a varied diet with complete amino acids remains more important than protein-branded products.