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Protocols · Metabolic

GLP1 (semaglutide / Ozempic): literature-reported ranges

GLP1 is the research code name for semaglutide, sold as Ozempic and Wegovy. This page covers that one compound only, so the reported figures cannot be confused with the dual or triple agonists. Every published programme uses a stepped escalation design rather than a fixed quantity.

Read this first

Every figure on this page is a range reported in published literature or in a publicly documented study protocol. It is a record of what researchers used, not a recommendation, a therapeutic protocol, or advice. Peptide Intel Hub is an independent publication, sells nothing, and describes these compounds as in-vitro research reagents only.

Compound at a glance

Class
GLP-1 receptor agonist
Reported half-life
Approximately 7 days
Routes used in the literature
Subcutaneous in every published trial programme
Also written as
Semaglutide, sold as Ozempic and Wegovy — single GLP-1 receptor agonist

What the published studies reported

Each row below describes one body of work. The model and population are part of the figure — a rodent per-kilogram quantity and a human trial quantity are not comparable.

GLP1 (semaglutide / Ozempic) — published trial escalation

Reported quantity
0.25 mg escalating in steps toward 2.4 mg weekly at the top of the studied range
Frequency
Once weekly
Study duration
4-week steps; 68-week primary endpoints in the large trials

Escalation exists in the protocols to manage gastrointestinal tolerability, not to increase effect faster.

Dosage chart

These figures match the published chart for this compound on peptidedosages.com, including the reconstitution volume, resulting concentration, insulin-syringe units and the staged schedule. Educational reference only — not instructions, and not medical advice.

Semaglutide · 10 mg Vial

Semaglutide Dosage calculations for a 10 mg vial use the same once-weekly escalation amounts evaluated in human research and listed in the current injectable product information. Adding 3 mL in this lyophilized-vial calculation produces 3.33 mg/mL, so each U-100 unit contains 33.33 mcg.

Reconstitute
Add 3 mL of the documented sterile diluent to produce 3.33 mg/mL.
Research frequency
Once weekly by subcutaneous administration in the cited human trials.
Weekly research range
The standard schedule shown below progresses from 0.25 mg to 2.4 mg weekly in four-week stages.
Easy measuring
1 U-100 unit = 0.01 mL = 33.33 mcg.
Vial size
The 10 mg label is total nominal vial content, not a weekly amount.
Vial coverage
At the 0.25 mg starting stage, one vial supplies 40 full weekly amounts. At the 2.4 mg maintenance stage, one vial supplies 4 full weekly amounts with 0.4 mg remaining. These are mass calculations, not vial storage or discard periods.

Standard Weekly Escalation Schedule (3 mL = 3.33 mg/mL)

Study PhaseWeekly AmountU-100 UnitsVolume
Weeks 1 to 40.25 mg7.5 units0.075 mL
Weeks 5 to 80.5 mg15 units0.15 mL
Weeks 9 to 121 mg30 units0.3 mL
Weeks 13 to 161.7 mg51 units0.51 mL
Weeks 17+2.4 mg72 units0.72 mL
Source chart on peptidedosages.com

Mixed with 3 ml of bacteriostatic water

The same arithmetic for every vial size GLP1 (semaglutide / Ozempic) is supplied in, using a fixed 3 ml of bacteriostatic water. One unit on a U-100 insulin syringe is 0.01 ml, so the unit column below is simply the volume that carries the reported amount. Educational arithmetic only — not instructions, and not medical advice.

GLP1 (semaglutide / Ozempic) · 3 ml bacteriostatic water

Vial sizeConcentrationPer 1 unit
5 mg1.67 mg/ml17 mcg
10 mg3.33 mg/ml33 mcg
15 mg5.00 mg/ml50 mcg
20 mg6.67 mg/ml67 mcg
30 mg10.00 mg/ml100 mcg

No single reported amount applies to this compound, so only the concentration and the value of one unit are shown. Only the vial sizes this compound is actually supplied in are shown, and every figure assumes exactly 3 ml of bacteriostatic water. For any other volume, use the reconstitution calculator.

Reconstitution maths

Research vials are typically 5 mg, 10 mg or 15 mg lyophilised. A 10 mg vial in 3 mL of bacteriostatic water gives 3.33 mg/mL, so one U-100 unit carries 33.33 mcg — use the calculator rather than estimating.

Open the reconstitution calculator

How to read these figures

  • These are in-vitro research reagents. The trial figures describe supervised clinical programmes with monitoring and titration, and are reported here as literature only.
  • Gastrointestinal tolerability is the reason every published protocol escalates slowly.
  • Research-grade material is not the same molecule quality as trial material; peptide content per vial routinely differs from the labelled mass.
  • GLP2 (tirzepatide) and GLP3 (retatrutide) are different molecules with different figures — each has its own page, and the numbers are not interchangeable.

Sources and citations

These are the published records the figures on this page are drawn from. Each one describes what researchers administered, in which model or population, and over what period. Quantities reported in a study are specific to that study's design and are not transferable guidance.

  1. [1]
    Once-Weekly Semaglutide in Adults with Overweight or Obesity

    Wilding JPH, Batterham RL, Calanna S, et al. · New England Journal of Medicine · 2021 · PMID 33567185

    1961 adults with overweight/obesity were randomized to once-weekly subcutaneous semaglutide 2.4 mg or placebo for 68 weeks as an adjunct to lifestyle intervention (STEP 1 trial).

    View the record
  2. [2]
    Tirzepatide versus Semaglutide Once Weekly in Patients with Type 2 Diabetes

    Frias JP, Davies MJ, Rosenstock J, et al. · New England Journal of Medicine · 2021 · PMID 34170647

    Patients with type 2 diabetes were randomized to once-weekly tirzepatide (5, 10, or 15 mg) versus semaglutide 1 mg for 40 weeks (SURPASS-2 trial).

    View the record

Search the databases yourself

Read the GLP1 (semaglutide / Ozempic) research brief

Other metabolic compounds

All research protocols

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© 2026 Peptide Intel Hub · Marbella · Educational research reference · For in-vitro research use only
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