Ray Cronise is a former NASA material scientist and the co-founder of Zero Gravity, a company that provides weightless parabolic flights to consumers and researchers. His work and discussions focus on healthspan, weight loss, intermittent fasting, and cold thermogenesis.
27 claims checked on air: 1 context 6 contradicted 3 overstated 12 supported 5 unverified 9 flagged
"if you think about the average person was spending 60% of their income on food." (said at 0:11:05)
No published record matching the claim that the average person spent 60% of their income on food at the turn of the 20th century was located; this does not prove the claim false.
"you'll see that, you know, you get a two on one side, three on the other, and you do the two and then three, and you get the respiratory quotient of 0.67... Carbohydrates of all types, doesn't matter what kind they are, all of the glucose, anything that's dropping in there, those have a respiratory quotient about 1. And then fats or lipids all run between 0.69 and 0.7. So what's really interesting is that amino acids, they average 0.84 if I average all of them." (said at 0:27:50)
No published record matching the claim regarding the specific respiratory quotient values for ethanol (0.67), carbohydrates (1.0), fats (0.69–0.70), and amino acids (averaging 0.84) was located; this does not prove the claim false.
"And SIRT1 gets activated every time you're making—so when you're eating anything, you know, when you're eating food you're going to make NADH, which shuts off SIRT1" (said at 0:51:59)
No published record matching the claim that eating food generates NADH which directly shuts off SIRT1 activation was located; this does not prove the claim false.
"mild cold stress begins at 80 F in water, okay? And it's uh it begins at 60 F in air. So that's about where the that's where you start seeing a change. You start seeing a metabolic response, you start seeing a hormonal hormonal response um at about those temperatures." (said at 1:22:00)
No published record matching the specific thresholds of 80°F in water and 60°F in air as the starting points for mild cold stress, metabolic changes, and hormonal responses was located; this does not prove the claim false.
"And his respiratory quotient went from 1.0, which is most activities are burning glycogen, almost to 0.7, almost pure fat. And for over an hour, he was still burning fat." (said at 1:28:20)
No published record matching the claim of a cold immersion test in journalist Steven Leckart showing a respiratory quotient shift from 1.0 to 0.7 and sustained fat oxidation for over an hour post-exposure was located; this does not prove the claim false.