Hormonal
Prolonged continuous stimulation of the GLP-1 receptor causes tachyphylaxis (attenuation) of gastric emptying slowing, whereas intermittent stimulation maintains this effect, leading to superior postprandial glycemic control with short-acting agonists compared to long-acting ones.
If you are using a GLP-1 agonist (like Ozempic or Trulicity) and struggle with high blood sugar after meals, it might be because your body has adapted to the constant drug levels, reducing its ability to slow down digestion. Switching to a short-acting version (like Saxenda or Byetta) taken before meals might restore this natural slowing effect and better control post-meal spikes, though it requires more frequent dosing.
These observations suggest that short-acting GLP-1 agonists may be superior to long-acting agonists when aiming specifically to reduce postprandial glycemic excursions in the treatment of type 2 diabetes.
Why this rating
Randomized, double-blind, crossover study in healthy men with rigorous measurement (scintigraphy), though limited to healthy subjects and short duration (24h).
Source
Comparative Effects of Prolonged and Intermittent Stimulation of the Glucagon-Like Peptide 1 Receptor on Gastric Emptying and Glycemia
Mahesh M. Umapathysivam et al. · Diabetes · 2013
DOI 10.2337/db13-0893
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