Ask Me Anything

with Sigma Nutrition Premium

Ask a question

Anorexia and morbid obesity and metabolic compensation

Can you talk about the conditions of anorexia and morbid obesity and how they essentially defy the rules of metabolic compensation? In other words- I understand anorexia to be a mental health condition where the individual starves themselves with a purpose to control weight. And morbid obesity being excessive consumption despite over fatness, etc. If the body has these numerous mechanisms by which calorie restriction or calorie over- consumption results in these compensatory processes-driving us to eat more/less slow us down/speed us up, and many more; do these individuals NOT "hear" these signals or are they just adept at ignoring them or is it that their bodies have lost the ability to compensate for their under or over consumption? Additionally, can anyone become anorexic or morbidly obese or is it merely genetics, and if you are in the proper life circumstance- you set these tendencies off? Thanks so much for your consideration of this convoluted question! Kristen in Dallas.

Obesity - Are the only efficacious interventions drugs and bariatric surgery?

It seems like there are significant differences in policies put forth between researchers from biomedical backgrounds and ones from public health policy backgrounds. Pr Allison touched on this during recent interviews, noting that there is very little evidence regarding the efficacy of upstream obesity prevention interventions, such community gardens, combatting food deserts, nutrition education, and cooking classes. On the other hand, governments are increasingly turning to such interventions, as well as policies such as front of pack labelling (Canada, 2022), nutrition facts tables, calorie labelling on menus, as well as the aforementioned ones. Given your research on determinants of health and obesity, what are some of the most promising interventions to prevent NCD morbidity, as well as stones unturned in public health policy? Would you agree with individuals such as Pr Allison that in our current environment, the only efficacious interventions are drugs and bariatric surgery? Regards, Gabriel

Bacteria, obesity, and the brain

In 2018 a poster was presented at the annual meeting of the Society for Neuroscience titled “The human brain microbiome; there are bacteria in our brains!” which showed bacteria apparently penetrating and inhabiting the cells of healthy human brains. While the work was preliminary, have you heard of any further work in this area? What is your opinion on the possibility that, if bacteria do inhabit the brain, they could play a part in appetite regulation and/or obesity similar to how the gut microbiome can affect our health?

Stephen Guyenet vs. Gary Taubes

I just got through listening to the debate on Joe Rogan between these guys and firstly- clearly Guyenet "won," but I wanted to ask him about whey protein and why didn't he mention how whey protein increases insulin despite it being a protein and not a carbohydrate? If Taubes is all about insulin and carbs/sugars- wouldn't this fact destroy his hypothesis? Additionally I thought that overeating on any macronutrient would increase insulin simply because you are eating food? Also is it possible that both men are correct- that both schools of thought could co-exist and they both be playing a major role in obesity? I loved the debate but was thinking about these 2 things the whole time. Thanks!!

Quantifying Everything

As an iOS developer, my instinct is to assume determinism and quantifiability of the entire universe. I believe this to be fundamentally true. But what is hypothetically possible differs from what we can realistically know. I worry that attempts like yours to quantify some seemingly qualitative measures are doomed. I have similar concerns about happiness research. How do you reassure yourself you can really construct an algorithm that deciphers the "ideal weight program" for any given user - do you rely on averages?