HoldsUp

Luc van Loon

Luc van Loon is a researcher in the fields of exercise science, sports nutrition, and muscle metabolism. His published research focuses on dietary protein requirements, muscle protein synthesis rates, and the metabolic effects of exercise. He also investigates the impacts of amino acid supplementation and resistance training on muscle mass and recovery across diverse populations, including athletes, older adults, and clinical patients.

55 claims checked on air: 2 context 1 contradicted 4 overstated 41 supported 7 unverified

What they said on air - unverified

13 citing their own research

0:00:30unverifiedvery lowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

Physical exercise sensitizes skeletal muscle to the stimulation of muscle protein synthesis by food intake for up to 24 to 48 hours.

"because exercise makes the muscle more sensitive to the stimulation of muscle protein synthesis through food intake, but it does so for up to 24 to even 48 hours." (said at 0:00:30)

No published record matching the claim that physical exercise sensitizes skeletal muscle to the stimulation of muscle protein synthesis by food intake for up to 24 to 48 hours was located; this does not prove the claim false.

0:08:42unverifiedvery lowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

Brain protein turnover is approximately three times faster than skeletal muscle protein turnover.

"Brain protein turnover is about three times as fast as muscle." (said at 0:08:42)

No published record matching the claim that brain protein turnover is approximately three times faster than skeletal muscle protein turnover was located; this does not prove the claim false.

0:08:42unverifiedvery lowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

The total human body synthesizes about 300 grams of protein daily and recycles approximately 230 grams of amino acids given an intake of 70 grams of protein.

"So in a total body, we synthesize on a daily basis about 300 grams of protein. And how much do you eat? About 70 grams. So that means that we're recycling 230 grams of amino acids on a daily basis." (said at 0:08:42)

No published record matching the specific claim that the total human body synthesizes approximately 300 grams of protein daily and recycles about 230 grams of amino acids given an intake of 70 grams of protein was located; this does not prove the claim false.

0:20:02unverifiedvery lowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

Older adults exhibit anabolic resistance, showing less stimulation of muscle protein synthesis in response to 20 grams of protein compared to young adults.

"Now, if you do that the same if you do that in older people and you give them the same 20 grams of protein, they show a lesser stimulation of muscle protein synthesis, and they do not reach that same level and certainly not the maximum level. So that's what they now call anabolic resistance." (said at 0:20:02)

No published record matching the claim that older adults exhibit anabolic resistance with less stimulation of muscle protein synthesis in response to 20 grams of protein compared to young adults was located; this does not prove the claim false.

0:37:20unverifiedvery lowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

Skeletal muscle mass loss during hospital admission is a significant predictor of clinical complications and hospital readmission.

"we see a lot of people in the hospital losing muscle, and so they're admitted to hospital, losing a lot of muscle, and we know that the the loss of muscle or muscle mass is an important predictor of clinical complications, readmission, health, etc." (said at 0:37:20)

No published record matching the claim that skeletal muscle mass loss during hospital admission is a significant predictor of clinical complications and hospital readmission was located; this does not prove the claim false.

0:40:10unverifiedvery lowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

Consuming a large protein bolus in the evening prior does not blunt or reduce the muscle protein synthesis response to breakfast the following morning.

"We provided protein in the evening or we didn't provide protein in the evening, and looked at the response to breakfast. Now, response to breakfast in both conditions was exactly the same, to my surprise, because I expected if you give a lot of protein the evening before, then the response to breakfast would be minimized, but it wasn't. It was exactly the same." (said at 0:40:10)

No published record matching the specific trial comparing the postprandial muscle protein synthesis response to breakfast following evening/pre-sleep protein ingestion versus a control condition was located; this does not prove the claim false. While published reviews on pre-sleep protein intake demonstrate that overnight protein ingestion stimulates overnight muscle protein synthesis and does not affect appetite at breakfast the following morning, specific published experimental data directly quantifying the fractional synthetic rate response to a subsequent breakfast meal were not identified.

1:43:44unverifiedlowDr. Luc Van Loon: Optimizing Protein Intake & Distribution f

Cartilage, bone, tendons, and ligaments are composed of more than 80% collagen.

"Cartilage, bone, tendons, ligaments, which is more than 80% collagen—maybe there it's more relevant" (said at 1:43:44)

No published record verifying that cartilage, bone, tendons, and ligaments are all composed of more than 80% collagen was located; this does not prove the claim false. In standard musculoskeletal biology, bone composition by mass is predominantly mineral (approximately 65-70% inorganic hydroxyapatite), with collagen making up the majority (~90%) of only the organic matrix component (which itself accounts for only ~20-30% of total bone mass). Tendons and ligaments have a high collagen fraction of their dry weight (often 70–80%+), whereas articular cartilage matrix wet weight is predominantly water (~70-80%) and its dry weight consists of approximately 50-60% collagen alongside proteoglycans.

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