FoundMyFitness · 2016-06-30 · Rhonda Patrick (host), Satchidananda Panda
Dr. Satchin Panda on Time-Restricted Feeding and Its Effects on Obesity, Muscle Mass & Heart Health
48 claims checked against research: 2 overstated 1 needing context 39 supported 1 corroborated online 5 unverified
2 Overstated
The human suprachiasmatic nucleus is composed of approximately 100,000 neurons and measures about one cubic millimeter.
"Suprachiasmatic nucleus or SCN, it's composed of around, say, 100,000 neurons, I guess, in humans, really small, maybe one millimeter by one millimeter. That's the size of this brain part." (said at 0:06:23)
The speaker substantially overstates the neuron count of the suprachiasmatic nucleus (SCN), though the physical size estimate is roughly accurate. Stereological and morphometric studies of the mammalian and human SCN show that each bilateral nucleus contains approximately 10,000 neurons (around 20,000 neurons across both nuclei combined), not 100,000. Morphometric measurements in humans show that the SCN spans roughly 1.0 to 1.8 mm in rostrocaudal length with individual subnucleus volumes well under 0.5 mm³.
- contradicts: The suprachiasmatic nucleus. (Current biology : CB 2018) · cited 167x in the literature
"Like it or not, your two suprachiasmatic nuclei (SCN) govern your life: from when you wake up and fall asleep, to when you feel hungry or can best concentrate. Each is composed of approximately 10,000 tightly interconnected neurons, and the pair sit astride the mid-line third ventricle of the hypothalamus, immediately dorsal to the optic chiasm (Figure 1A)." (abstract, passage verified)
pubmedfull study (doi) - contradicts: Circadian Regulation of Metabolism: Commitment to Health and Diseases. (Endocrinology 2023) · cited 38x in the literature
"The master pacemaker of biological rhythms is housed in the hypothalamic suprachiasmatic nucleus (SCN) where approximately 20,000 neurons exist and receive light stimulus as a predominant timed external cue (zeitgeber)." (abstract, passage verified)
pubmedfull study (doi) - partial: Suprachiasmatic nucleus of the human brain: an immunocytochemical and morphometric analysi… (The Anatomical record 1996) · cited 86x in the literature
"The main portion of the VP positive neurons is located in the dorsomedial part of the SCN and is rostrocaudally longer in females than in males (1.76 +/- 0.12 mm and 1.40 +/- 0.10 mm, respectively). The volume of the VP subdivision is 0.244 +/- 0.017 mm3 and contains 6,890 +/- 520 VP-immunoreactive neurons, with a mean density of about 29,000 neurons/mm3." (abstract, results, passage verified)
pubmedfull study (doi)
Beta-hydroxybutyrate has been shown to enhance physical endurance.
"I would like to try the nine hours to see if I can get any endurance benefits, which may possibly be mediated by beta-hydroxybutyrate... because that's been shown to affect endurance." (said at 1:06:10)
While early preliminary research suggested that acute elevation of circulating beta-hydroxybutyrate via ketone ester supplementation might enhance endurance performance by sparing muscle glycogen, subsequent systematic reviews and meta-analyses of randomized controlled trials have found no consistent ergogenic benefit. Meta-analyses demonstrate that acute exogenous ketone supplementation (via ketone esters or salts) does not significantly improve time-trial performance, time-to-exhaustion, or maximal oxygen uptake in endurance exercise, and can in some cases impair high-intensity efforts or cause gastrointestinal distress and reduced buffering capacity.
- contradicts: Acute Ketone Supplementation and Exercise Performance: A Systematic Review and Meta-Analys… (International journal of sports physiology and performance 2020) · cited 35x in the literature
"Thirteen studies met all inclusion criteria. No significant differences were observed between interventions for overall exercise performance (Hedges g = -0.05; 95% CI, -0.30 to 0.20; P = .68). Subanalyses revealed no differences between interventions when analyzing endurance time-trial performance (g = -0.04; 95% CI, -0.35 to 0.28; P = .82) or when assessing the separate effects of supplements containing ketone esters (g = -0.07; 95% CI, -0.38 to 0.24; P = .66) or salts (g = -0.02; 95% CI, -0.45 to 0.41; P = .93)." (abstract, results, passage verified)
pubmedfull study (doi) - contradicts: Exogenous ketosis impacts neither performance nor muscle glycogen breakdown in prolonged e… (Journal of applied physiology (Bethesda, Md. : 1985) 2020) · cited 67x in the literature
"In conclusion, KE intake during a simulated cycling race does not cause glycogen sparing, nor does it affect all-out performance in the final stage of a simulated race." (abstract, conclusions, passage verified)
pubmedfull study (doi) - contradicts: The Effects of Ketogenic Diets and Ketone Supplements on the Aerobic Performance of Endura… (Sports health 2025) · cited 7x in the literature
"Endurance performance was assessed by time trials, 180-minute running trials, or run-to-exhaustion trials; 5 studies on ketogenic diets and 7 studies on ketone supplements involving a total of 132 endurance runners were included. Despite the heterogeneity in study design and protocol, none reported benefits of ketogenic diets or ketone supplements on selected markers of aerobic performance compared with controls." (abstract, results, passage verified)
pubmedfull study (doi)
Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.