Engineer and problem solver with an interest in nutrition and n=1 personal experimentation in diet, exercise and lifestyle. Alter-ego of @VirtuallyNathan
The window seat on a plane is an incredible modern blessing. Imagine our ancestors getting to take in such a view. They would have been stunned, speechless. And yet, some close the shade and do what? My God.
I can't understand those who shut the shade, and shut out the world.
"Unravelling cysteine-deficiency-associated rapid weight loss"
"conditional cysteine restriction resulted in the most substantial weight loss [...] amounting to 30% within 1 week. We found that cysteine deficiency activated the integrated stress response [...] leading to the induction of GDF15 and FGF21"
nature.com/articles/s41586-0…
“Commercial methionine restriction (MR) diets contain 0.17% methionine compared with normal levels of 0.86%, but notably, the MR diets also lack cystine”
… what?!
"Unravelling cysteine-deficiency-associated rapid weight loss"
"conditional cysteine restriction resulted in the most substantial weight loss [...] amounting to 30% within 1 week. We found that cysteine deficiency activated the integrated stress response [...] leading to the induction of GDF15 and FGF21"
nature.com/articles/s41586-0…
CoA scarcity stalls β‑oxidation and the TCA cycle, forcing a wasteful spill‑over of glycolytic and TCA intermediates into urine, amplifying the integrated‑stress‑response that drives GDF-15 and FGF21 transcription; more details in: biorxiv.org/content/10.1101/…
Human data:
N = 59 participants with overweight or obesity (73% women) were randomized stratified by sex to an 8-week plant-based dietary intervention low (~ 2 g/day, SAAR) or high (~ 5.6 g/day, control group) in sulfur amino acids.
SAAR led to a ~ 20% greater weight loss compared to controls (β 95% CI - 1.14 (- 2.04, - 0.25) kg, p = 0.013)
pubmed.ncbi.nlm.nih.gov/3819…