Episode 21: Understanding Protein and Muscle with Professor Luc Van Loon

Your Muscles Completely Renew Every Few Months: Muscle proteins turn over at 1-2% per day, meaning your entire muscle mass is broken down and rebuilt roughly every 50-100 days. This constant refurbishment is why protein and muscle health are so closely linked—and why muscle loss becomes apparent so quickly during illness or immobility.

The WHO Minimum Isn't the Optimum: The WHO guideline of 0.83g protein per kilogram body weight per day represents the minimum to maintain nitrogen balance, not optimal intake. Most healthy, active people naturally consume 1-1.2g/kg, while athletes easily reach 1.5g/kg simply by eating more food.

20-25 Grams Per Meal Is the Sweet Spot: This amount of protein stimulates muscle protein synthesis for four to six hours. That's equivalent to half a litre of milk, two to three eggs, 70-100g of meat or fish, or a coffee cup full of nuts.

Plant Proteins Work—You Just Need More: While plant-based proteins have lower digestibility and may lack certain amino acids, eating a diverse range of plant foods compensates for these limitations. As Prof. Van Loon puts it: "Similar to cheap beer, you can compensate for lesser quality by greater quantity."

Sitting Upright and Chewing Well Aren't Just Manners: Research shows body position and chewing have measurable effects on protein digestion—comparable in magnitude to the differences between whey and casein proteins. Studies hanging participants upside down revealed dramatically impaired gastric emptying.

Hospital Patients Are Severely Underproteinised: People recovering from elective surgery consume only 0.5g protein per kilogram body weight daily—roughly one third of the 1.2-1.5g/kg recommended for recovery. Most food provided simply isn't eaten.

Age-Related Muscle Loss Is Largely Preventable: The demographic decline in muscle mass as we age isn't inevitable biology—it's the accumulated impact of successive periods of illness and immobility where people lose more muscle than they regain during recovery.