HoldsUp

Stuart Phillips

McMaster University

Stuart Phillips, PhD, is a professor of kinesiology and the director of the Physical Activity Centre of Excellence at McMaster University. His research focuses on the roles of exercise and nutrition in regulating human skeletal muscle protein turnover and body composition, particularly during aging. His published work investigates resistance training protocols, muscle hypertrophy mechanisms, dietary protein requirements, and physical function recovery.

47 claims checked on air: 1 context 1 contradicted 27 supported 18 unverified 1 flagged

What they said on air - contradicted

0:15:48contradictedmoderateStuart Phillips, PhD, on Building Muscle with Resistance Exe

Nitrogen balance studies used to establish the RDA for protein are prone to errors due to incomplete collection and overestimation of nitrogen losses.

"The original studies that led to the derivation of the Recommended Dietary Allowance are what we call nitrogen balance... Those studies we've known for a long time are problematic because of incomplete collection, overestimation, etc., of losses." (said at 0:15:48)

While dietary reference values (such as the Recommended Dietary Allowance) for protein were historically established using nitrogen balance studies, the speaker states the direction of the methodological error backwards. In classical nitrogen balance studies, incomplete collection of urine/feces and unmeasured miscellaneous routes (such as sweat, hair, skin desquamation, and flatus) lead to an underestimation of nitrogen losses (output) and an overestimation of intake, resulting in an artificially positive balance and potential underestimation of true protein requirements, rather than an overestimation of losses.

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