HoldsUp

Angelo Keely

KION

Angelo Keely is associated with KION. He discusses health, nutrition, and fitness topics, including midlife body composition changes, muscle loss and building, dietary protein, essential amino acids, and metabolism.

20 claims checked on air: 4 contradicted 5 overstated 9 supported 2 unverified

What they said on air - contradicted

0:04:47contradictedmoderateMuscle, Protein & Perimenopause: The Truth About Midlife Wei

Sleep disruption can have more of an impact on muscle protein synthesis in the body than dietary protein intake.

"Like if you just think about how much your sleep gets impacted in menopause, sleep can have more impact on protein synthesis in the body than even your protein intake." (said at 0:04:47)

Dietary protein intake (specifically essential amino acid availability) is the primary anabolic stimulus for skeletal muscle protein synthesis, acutely stimulating synthesis rates several-fold above basal levels. While experimental sleep restriction has been shown to reduce muscle protein synthesis (for example, acute sleep restriction of 4 hours per night reduced myofibrillar protein synthesis by approximately 19% in healthy young men), it does not exert a larger impact on protein synthesis than dietary protein intake itself.

0:29:36contradictedhighMuscle, Protein & Perimenopause: The Truth About Midlife Wei

Research, including work by Dr. Zachary Knight, indicates that body weight and body fat are more genetically predetermined than height.

"There's really interesting research. I'm trying to remember which institution he's from. He's in the UC California system. Dr. Zachary Knight. Um but basically uh body weight and body fat is more genetically predetermined than even like your height, like that." (said at 0:29:36)

The claim that body weight and body fat are more genetically predetermined than height is contradicted by twin and family genetics literature. Quantitative genetic studies consistently find that human height is among the most highly heritable complex physical traits (heritability typically estimated around 80%), whereas heritability estimates for body mass index (BMI), body fat, and weight are substantial but lower or at best equal (typically 40% to 70%). While neuroscientists like Dr. Zachary Knight (UCSF) study the neural circuits governing hunger and body weight homeostasis, epidemiological twin data do not demonstrate that adiposity or weight is more genetically determined than adult height.

0:55:50contradictedmoderateMuscle, Protein & Perimenopause: The Truth About Midlife Wei

Consuming 30 grams of beef protein alone stimulates more muscle protein synthesis than consuming 70 grams of beef protein as part of a mixed meal with carbohydrates and vegetables.

"if you consume 30 g of beef protein, which is about what you would get in like a 6 oz steak, like that's actually how much like total protein you would get. If you eat that on its own, it actually stimulates more protein synthesis than if you eat twice that amount, 70 g of beef protein, as part of a mixed meal." (said at 0:55:50)

Human clinical trials investigating the dose-response of muscle protein synthesis (MPS) to beef ingestion show that consuming a moderate dose of high-quality protein (e.g., 30 g of protein from 113 g of lean beef) maximally stimulates MPS, but consuming larger amounts (such as 90 g of protein from 340 g of beef) or consuming protein within a mixed meal does not reduce or suppress muscle protein synthesis below the level seen with 30 g. Instead, fractional synthetic rates reach a plateau with no further increase in muscle protein synthesis, rather than a decline. No evidence supports the assertion that 30 g of isolated beef protein stimulates greater muscle protein synthesis than 70 g consumed within a mixed meal.

1:01:59contradictedmoderateMuscle, Protein & Perimenopause: The Truth About Midlife Wei

Combining leucine-rich essential amino acids with whey protein powder makes the whey protein powder more effective at stimulating protein synthesis.

"And we've seen that kind of We've seen those kinds of studies when people take, for example, essential amino acids, leucine-rich essential amino acids plus a whey protein powder. The whey protein powder becomes way more effective." (said at 1:01:59)

Human trial evidence shows that adding leucine or leucine-rich essential amino acids to an adequate dose of whey protein does not further elevate or improve postprandial muscle protein synthesis rates. Whey protein is inherently rich in leucine (~10-13% leucine content), which typically provides enough leucine to fully saturate the muscle protein synthetic response. In a randomized controlled trial in healthy older men, Koopman et al. (PMID 17697406) demonstrated that co-ingestive leucine with carbohydrate and protein did not further elevate muscle fractional synthetic rate compared to carbohydrate and protein alone. Similarly, studies evaluating whey protein versus whey protein plus supplemental leucine or amino acids in clinical populations (e.g., PMID 23886411) found no additional effect on net or whole-body protein synthesis from added leucine. While leucine fortification improves the lower anabolic response of plant-based proteins (such as soy or pea protein blends) to make them comparable to whey protein (PMID 30698812, PMID 38846451), adding extra leucine to whey protein itself does not make whey protein "way more effective."

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