Education only · provider review required
Research pathway · 07
Metabolic & weight research, explained
Weight and metabolic health is the most-searched peptide topic and the one with the widest gap between approved medicines and research peptides. This page separates the two clearly.
Free · about 10 minutes · reviewed by a licensed physician
What people are usually asking
Most people arrive here having heard of semaglutide or tirzepatide. Those are FDA-approved prescription medicines with large clinical trials behind them — a completely different category from the research peptides on the rest of this site. It is worth knowing that before any conversation.
Alongside them, a handful of research peptides are discussed in metabolic literature — fat-metabolism fragments, mitochondrial peptides — with far thinner evidence. This page keeps the two groups separate on purpose.
Peptides discussed in this context
Listed for education. Inclusion is not a recommendation, and none of these is an FDA-approved treatment for the question above.
AOD-9604 · Research Overview & Provider Discussion Guide
Growth-hormone fragment · fat metabolism
Human trials did not support approval · Not an FDA-approved drug for this use
Read the page → 02MOTS-c · Research Overview & Provider Discussion Guide
Mitochondrial peptide · metabolic signalling
Preclinical & early human · Not an FDA-approved drug for this use
Read the page → 03Semaglutide vs Tirzepatide
Semaglutide vs tirzepatide
Both FDA-approved under brand names · compared here for education
Read the page → 04Semaglutide
GLP-1 agonist
FDA-approved (Ozempic / Wegovy)
Read the page → 05Tirzepatide
GIP/GLP-1 dual agonist
FDA-approved (Mounjaro / Zepbound)
Read the page → 06Liraglutide
Daily GLP-1 agonist
FDA-approved · generics
Read the page → 07Retatrutide
Triple agonist
Phase 3 · not approved
Read the page → 08Cagrilintide
Amylin analogue
Phase 3 · not approved
Read the page → 095-Amino-1MQ
NNMT inhibitor (not a peptide)
Mouse data only
Read the page → 10SLU-PP-332
ERR agonist (not a peptide)
Mouse data only
Read the page → 11Lipotropic (MIC / "Lipo") shots
Lipo / MIC shots
No controlled evidence
Read the page → 12Cryolipolysis (CoolSculpting)
Cryolipolysis
Cleared for contouring · not weight loss
Read the page → 13Thyroid basics
Thyroid
Rule out first
Read the page →Where the evidence stands
Approved medicines. Semaglutide and tirzepatide are FDA-approved for chronic weight management and type 2 diabetes under their brand names, with multi-year trial data. Whether they are appropriate for an individual is a prescribing decision with real contraindications and side effects.
Research peptides. AOD-9604 is a fragment of growth hormone studied for fat metabolism; it reached human trials that did not support approval. MOTS-c is studied for metabolic signalling, mostly preclinically. Neither is approved for weight management.
Status reflects published research context only and is not a statement of safety, efficacy, or suitability for any person.
Questions worth bringing to a provider
The intake is where individual questions belong. These are the ones that tend to make that conversation useful.
- Is an FDA-approved medicine an option for me, and what are its contraindications in my case?
- What labs would you want first — A1c, lipids, thyroid, liver?
- How would you monitor side effects, and what would make you stop?
- What happens to weight if and when the medicine is stopped?
What happens if you start an intake
The intake covers weight history, metabolic labs if you have them, medications and conditions such as thyroid disease, pancreatitis history or eating-disorder history. A licensed provider reviews it and tells you whether an approved medicine, a research context, or neither is appropriate. Free, about 10 minutes, no obligation.
Frequently asked questions
Is semaglutide a peptide?
Yes — it is a GLP-1 receptor agonist peptide, and it is also an FDA-approved prescription medicine. That approval is what separates it from the research peptides on this site.
Does Vitrex sell or prescribe weight-loss medication?
No. Vitrex sells nothing and prescribes nothing. If a licensed provider at Doctor G Medical considers an approved medicine appropriate after intake, that is their clinical decision and their prescription.
Is AOD-9604 approved for weight loss?
No. It was studied in human trials that did not lead to approval. It is discussed here as research context only.
Next step
Next step: a 3-minute confidential intake, reviewed by a licensed provider. No treatment is promised or implied.
Free · about 10 minutes · reviewed by a licensed physician
General education · Not medical advice · Provider approval required