The Proof with Simon Hill

Protein amount, quality and timing | Dr Luc van Loon

118 snips
Jan 5, 2026
Guest
Luc van Loon
Dr. Luc van Loon, a leading expert in exercise physiology at Maastricht University, shares groundbreaking insights into protein metabolism and muscle health. He debunks common protein myths, emphasizing the crucial role of amino acids and the effects of inactivity on muscle loss. The discussion covers the protein needs across different life stages, the impacts of diet types on muscle health, and how physical activity can combat anabolic resistance in aging. Luc also highlights practical advice for optimizing protein intake and digestion.
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INSIGHT

Activity Reverses Anabolic Resistance

  • 'Anabolic resistance' means older muscle responds less to amino acids, but physical activity largely reverses it.
  • Van Loon reports immobilizing one leg reduces its protein uptake within days, showing use-it-or-lose-it.
ADVICE

Spread Moderate Protein Across Meals

  • Aim for a moderate daily protein intake (≈1.2–1.4 g/kg) and distribute it across meals.
  • Add a protein-rich breakfast and an evening protein snack to meet needs without excess.
INSIGHT

Big Meals Stimulate Protein Synthesis Longer

  • Large single protein meals digest and stimulate synthesis over much longer windows than short tracer studies suggest.
  • Van Loon's 100 g meal still boosted muscle protein synthesis many hours later versus a 25 g meal in short-term measures.
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