The Journal

Research, protocols & longevity dispatches.

One long-form piece a day. No filler, no jargon, no hype. Just what the data actually says and what to do about it.

Clinician and patient reviewing a weekly semaglutide dose calendar in a warm, sunlit clinic room.

Latest · GLP-1

How Long Does It Take Semaglutide to Start Working Week by Week

A practical week-by-week timeline of symptoms, appetite, early weight and blood-sugar changes, and what to expect through the first year.

Short answer: people often notice appetite and nausea changes in days, blood-sugar shifts in 1, 4 weeks, and measurable weight loss by 4, 12 weeks. A week-by-week map.

July 8, 2026 · 13 min read