Ready for an #obesity#research disruptor? @bcorkey 's studies on hyperinsulinemia and inflammation are a perennial favorite
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We often focus on slow or fast metabolism but there isn't enough talk on *energy efficiency*. See how much additional Δkcal is required (beyond that calculated) to effect 10% weight Δ: nejm.org/doi/full/10.10…
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"We ignore this important variable: involuntary control of energy metabolism" - @bcorkey
- "ROS burns extra fuel" - data not shown (not yet published)
- ROS ↑ insulin secretion
- ROS ↑ in response to excess fuel and causes a leak to ↓ energy efficiency
This is a beautiful study, answering many of the questions we clinicians and our patients are asking:
🤔What happens if I stop the GLP1?
Here's one punch line that we all could've guessed:
⭐️Exercise mitigates #weight regain when anti #obesity #medicine is stopped⭐️
But there's a lot more to observe here:
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Here's the study method:
There's an "induction" phase 1 where #weightloss is caused by a low-calorie #diet over 8 weeks
Then everyone is randomized to 1 of these 4 groups
After 1 year, all of these interventions are stopped, and researchers just watch to see what happens to #weight
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Going back to this main figure, interesting things pop out:
👉We all slowly find our ways back to baseline weight regardless of #obesity treatment type
👉All groups (not just those with meds) rebounded to higher than what the weight was before the treatment phase, but greatest rebound was with liraglutide alone
👉Greatest additional weight loss was seen with combination lira+exercise
- drugs can cause false negative screens but not false positive screens
- you can probably just treat with mineralocorticoid antagonist instead of going through the diagnostic steps
- "Tirzepatide is a dual agonist"
👉It ↑GIP activity but GLP-1R agonism is less than that of endogenous GLP-1
- "Hypoglycemia is not a concern if you're not on insulin"
👉Risk of hypoglycemia ~1.4% vs. 0.2% in placebo in SURMOUNT-1
@alpanashuklamd et al examined the effect of macronutrient sequencing (carbs first vs carbs last) in ppl with diabetes, prediabetes, or gestational diabetes
Among those with prediabetes, we saw significant differences in glucose, insulin, ghrelin, and GLP-1 -- all favoring the "carbohydrates-last" food order
Always a pleasure to listen to @KevinH_PhD discuss his testing of hypotheses in contributors to #obesity 1/
Many people remember his 14-day study of ultra processed foods (UPF) vs unprocessed foods (n=20) that found energy intake was ~500 kcal/d LESS with unprocessed meals
Details you might not know:
- Groups were not matched for type of sugar
- No hint of a difference in insulin sensitivity between groups based on OGTT results
- Groups were not matched for beverage amount (and implication for speed of food intake)
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