Semaglutide
GLP-1 receptor agonist
appetite
glycemic control
body recomposition
metabolic health
fat distribution
cardiovascular health
keeping the result
healthspan
The most rigorously trialled molecule in this library, with cardiovascular outcome data behind it.
Goal profile
WEIGHT
5/5 axes
LONGEVITY
3/7 axes
PERFORMANCE
1/4 axes
Evidence
2012
first described
5,308
indexed studies
How strong the evidence is
Licensed medicine
Registration trials plus cardiovascular outcome trials in tens of thousands of people. The most thoroughly documented molecule in the library.
Highest study design
registration trials
Human studies
412
Replication
independent international
Regulatory status
FDA or EMA approval
Last reviewed
2026-08-14
The bar is derived from these five facts, not set by hand. Human study counts follow the weekly PubMed refresh; the rest change only when a trial is published or a regulator acts.
How strong the effect is
strength 3 of 5 · weight 0.59
Changes how you feel
10–15% of body weight.
What's unique
Cardiovascular outcome data. Nothing else in this library has an endpoint trial of that size.
Unexpected positive evidence
Alcohol and nicotine cravings dropped in trial participants who were not asked about them.
Benefits
appetite suppression that removes food noise instead of demanding willpower
Appetite · immediate
sustained 10–15% body-weight reduction
Appetite · immediate
improved insulin sensitivity and HbA1c control
Glycemic control · from week 4
slower gastric emptying with earlier and longer satiety
Appetite · immediate
reduced cardiovascular risk — fewer heart attacks and strokes
Cardiovascular health · from week 12
weaker cravings for alcohol and nicotine
Appetite · immediate
Timeline
Weeks 1–4
Appetite drops almost immediately — food noise quietens within days. Nausea, fullness and constipation are worst in the fortnight after each dose increase.
Weeks 4–12
Steady weight loss as dose escalates. Portion sizes fall naturally. Muscle loss starts here too, which is why protein and resistance training stop being optional.
Weeks 12–40
The long window. Loss continues at a slower rate and typically plateaus somewhere past week 40. Blood pressure and glucose markers improve along the way.
Post-cycle
Appetite returns within weeks. Trial participants regained roughly two-thirds of the lost weight within a year off treatment — an exit plan matters more than the protocol.
Risks
Short-term
Nausea, constipation, early satiety. Dose-dependent and mostly resolving.
Long-term
Muscle loss alongside fat loss; gallbladder events; pancreatitis at trial rates.
Tolerance & withdrawal
No tolerance; weight regain on discontinuation is well documented.
Dosing
Dose
0.25–2.4 mg per week
1 mg weekly holds most of the effect; 2.4 mg is the maximum, not the target.
Route
Subcutaneous — abdomen, thigh or upper arm
Rotate between the three areas so the tissue does not harden where you always inject.
Timing
Any time of day, same day each week
The day matters, the hour does not — anchor it to something you already do weekly.
Frequency
Once a week
Once weekly. Splitting the dose is a workaround for nausea, not a protocol.
Cycle
Titrate every 4 weeks, then hold indefinitely
Step up every four weeks while nausea allows, then hold at whatever works.
Duration
Open-ended
Appetite usually returns when you stop, so most people plan for a long run rather than a course.
Forms
injectable
~100%
+ Full dose delivered; nothing lost to first-pass
− Daily needles, sites, sharps disposal
Refrigerate 2–8 °C after reconstitution
oral
1–15%
+ Simplest possible routine
− Most of the dose is destroyed before absorption
Cool, dry, dark
Sources
5,308 indexed papers in the source catalog snapshot; not a live PubMed count
Catalog evidence category: known. This is an editorial classification, not a clinical review.
Community anecdotes do not establish safety or efficacy.
Primary regulatory sources are linked below; clinical literature has not been independently reviewed for this FAQ.
FAQ
Semaglutide (GLP-1 receptor agonist) is an acylated GLP-1 analogue. The HEIVE catalog describes it as: The most rigorously trialled molecule in this library, with cardiovascular outcome data behind it. It is also known as Ozempic and Wegovy.
Regulatory sources checked: . Source verification only; no clinician review is claimed.