Research

Hormonal

Pre-existing use of Glucagon-like Peptide-1 Receptor Agonists (GLP-1 RA) is significantly associated with reduced weight loss in patients undergoing a Full Meal Replacement (FMR) intensive lifestyle intervention.

If you are currently taking a GLP-1 RA (like Ozempic or Wegovy) and start a strict meal replacement program, you might not lose as much weight as expected compared to those not on the medication. This does not mean the medication is ineffective, but its interaction with the FMR protocol may differ from standard expectations. Discuss this with your provider.

ModerateQualifiesMEDIUM confidence
Patients on a Glucagon‐like Peptide‐1 Receptor Agonist prior lost less weight.
Matthew Skeldon et al. · Obesity Science & Practice · 2023

Why this rating

Retrospective cohort study; association does not prove causation.

Source

A comparison of virtual and in person delivery of a full meal replacement program for obesity

Matthew Skeldon et al. · Obesity Science & Practice · 2023

DOI 10.1002/osp4.718

cohort · n=234Cited 2×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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