Guides
Sourced answers (official product information, EMA) to the questions people on GLP-1s actually ask — kept up to date as the facts evolve.
- Mounjaro and Wegovy on the NHS: how UK coverage really works
NHS cohorts, real waiting times, private prices, and how the UK compares with France: a sourced 2026 guide to Mounjaro and Wegovy coverage in the United Kingdom.
Updated 29 August 2026 - Wegovy & Mounjaro side effects: what to expect week by week
Nausea, digestion, fatigue: when Wegovy and Mounjaro side effects appear, how long they last, and when to seek help — with SmPC and trial numbers.
Updated 29 August 2026 - Wegovy vs Mounjaro: which one is right for you in 2026?
Head-to-head efficacy (SURMOUNT-5), side effects, heart data, and French coverage: what the evidence actually says about choosing between Wegovy and Mounjaro.
Updated 29 August 2026 - BMI 35 and comorbidities: do you qualify for Wegovy or Mounjaro coverage in France?
BMI ≥ 40, or ≥ 35 with a comorbidity: how to calculate your BMI, which conditions count (diabetes, hypertension, apnoea…) and which BMI the French rules use.
Updated 21 August 2026 - Changing your Wegovy or Mounjaro injection day: the 72-hour rule
Holidays, jet lag: how to change your Wegovy or Mounjaro injection day with the official 3-day (72-hour) rule, and how to store your pen when travelling.
Updated 21 August 2026 - The GLP-1 dictionary: sema, tirz, reta… community vocabulary, decoded
Sema, tirz, reta, food noise, titration, NSV, stacking: the dictionary of terms you'll meet in GLP-1 communities, explained simply and without judgement.
Updated 21 August 2026 - Best place to inject Mounjaro or Wegovy: sites & rotation
Where should you inject Mounjaro or Wegovy? The 3 official sites, why weekly rotation matters and what to avoid — based on the official SmPCs.
Updated 21 August 2026 - Missed your Wegovy or Mounjaro injection? What to do, day by day
Forgot your Wegovy or Mounjaro shot? The official rules: 5 days to catch up on Wegovy, 4 days for Mounjaro, and never a double dose. A sourced guide.
Updated 21 August 2026 - Retatrutide ('reta', R3, 'ratatouille'): what the science actually says
Why everyone calls retatrutide 'reta', R3 or 'ratatouille': the TRIUMPH trial results, the approval timeline and the real risks of grey-market vials.
Updated 21 August 2026 - Retatrutide: what the studies actually show, from phase 2 to TRIUMPH
Retatrutide's results decoded: the NEJM phase 2 trial, TRIUMPH-1 to 4, up to 30% average weight loss — and what those numbers don't tell you.
Updated 21 August 2026 - The SELECT trial: what semaglutide (Wegovy) really changes for the heart
The SELECT trial decoded: 17,604 patients, 20% fewer major cardiovascular events on semaglutide. What it means — and who it applies to.
Updated 21 August 2026 - The SURMOUNT-1 trial: the real numbers for Mounjaro (tirzepatide)
SURMOUNT-1 decoded: up to −20.9% body weight at 72 weeks on tirzepatide, and a 94% lower risk of type 2 diabetes at 3 years. Exact figures and caveats.
Updated 21 August 2026 - Wegovy and Mounjaro in France: how coverage and 'mutuelle' insurance work
Living in France? How Wegovy and Mounjaro reimbursement works in 2026: the 65% state share, what your mutuelle tops up, the €1 franchise, and real monthly costs.
Updated 21 August 2026 - Wegovy and Mounjaro half-life: how long the medication stays in your body
Semaglutide half-life (~1 week) and tirzepatide's (~5 days): how long they stay in your system, the 4-5 week plateau, and what happens after stopping.
Updated 21 August 2026