AOD-9604
A fragment, not the whole hormone.
AOD-9604 is a fragment of human growth hormone rather than the hormone itself. It arrives as a small powder, usually 2 or 5 mg, and is dosed in micrograms.
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- Free
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- U-100
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- Data
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The science
Why a fragment is dosed like a peptide, not a hormone
01
AOD-9604 is a modified fragment of human growth hormone, corresponding to the final residues of the molecule. It was developed and investigated as an obesity treatment and did not reach approval, so what circulates now is research chemical supply.
02
Being a fragment rather than the whole hormone matters for how it is measured. Growth hormone itself is dosed in international units, which cannot be converted to mass. AOD-9604 is supplied and dosed by mass in milligrams and micrograms, so ordinary concentration arithmetic applies throughout.
03
Vials are small, usually 2 or 5 mg, and doses sit in the low hundreds of micrograms. That ratio puts the usual measurement problem in play: a 5 mg vial in 1 ml is 5 mg per ml, so a 300 mcg dose is 6 units, which is readable but not generous.
04
More water moves it up the barrel. The same vial in 2 ml makes that dose 12 units, comfortably within the part of a U-100 syringe you can read accurately. The cost is that the vial holds more solution than a short storage window may let you use.
Lookup
2, 5 and 10 mg vials, worked through
Microgram doses from a small vial sit low on the barrel unless the reconstitution is generous. The dots mark combinations that fall under two units.
2 mg AOD-9604 vial
Units on a U-100 syringe
| Dose | 1 ml | 1.5 ml | 2 ml | 2.5 ml | 3 ml |
|---|---|---|---|---|---|
| 100 mcg | 5 | 7.5 | 10 | 12.5 | 15 |
| 250 mcg | 12.5 | 18.75 | 25 | 31.25 | 37.5 |
| 300 mcg | 15 | 22.5 | 30 | 37.5 | 45 |
| 500 mcg | 25 | 37.5 | 50 | 62.5 | 75 |
| 1 mg | 50 | 75 | 100 | · | · |
5 mg AOD-9604 vial
Units on a U-100 syringe
| Dose | 1 ml | 1.5 ml | 2 ml | 2.5 ml | 3 ml |
|---|---|---|---|---|---|
| 100 mcg | 2 | 3 | 4 | 5 | 6 |
| 250 mcg | 5 | 7.5 | 10 | 12.5 | 15 |
| 300 mcg | 6 | 9 | 12 | 15 | 18 |
| 500 mcg | 10 | 15 | 20 | 25 | 30 |
| 1 mg | 20 | 30 | 40 | 50 | 60 |
10 mg AOD-9604 vial
Units on a U-100 syringe
| Dose | 1 ml | 1.5 ml | 2 ml | 2.5 ml | 3 ml |
|---|---|---|---|---|---|
| 100 mcg | · | · | 2 | 2.5 | 3 |
| 250 mcg | 2.5 | 3.75 | 5 | 6.25 | 7.5 |
| 300 mcg | 3 | 4.5 | 6 | 7.5 | 9 |
| 500 mcg | 5 | 7.5 | 10 | 12.5 | 15 |
| 1 mg | 10 | 15 | 20 | 25 | 30 |
A dot marks a combination that falls under two units or overflows a 100-unit barrel. Both are hard to measure accurately, so they are worth avoiding rather than eyeballing.
Regulatory status
Investigated, never approved
AOD-9604 was developed and studied as a treatment for obesity. It did not reach approval, and no regulator has authorised it for human use, so there is no prescribing information and no official dose.
It is covered by the World Anti-Doping Agency's S0 category, which captures any pharmacological substance with no current approval from any governmental health authority, so it is prohibited in tested sport at all times.
Its status has been contested in sport before, which is worth knowing if you compete: the safe assumption is that an unapproved substance is prohibited, not that an absence of a specific listing makes it permitted.
FAQ
Common questions
How many units is 300 mcg of AOD-9604?
It depends on the concentration. A 5 mg vial reconstituted with 2 ml is 2.5 mg per ml, so 300 mcg is 0.12 ml, which is 12 units on a U-100 syringe. The same vial in 1 ml makes it 6 units. A units figure means nothing without the water volume behind it.
How much bacteriostatic water for a 5 mg AOD-9604 vial?
Commonly 1 to 2 ml. Two millilitres puts typical microgram doses in the 10 to 20 unit range, which is the part of the barrel that reads most reliably. Using less water pushes small doses toward the bottom where the graduations are coarse.
Is AOD-9604 the same as HGH fragment 176-191?
They are closely related and the terms are often used interchangeably, but AOD-9604 is a modified version of that fragment rather than the fragment itself. If your vial is labelled one way, use that label for the arithmetic rather than assuming the two are identical presentations.
Does AOD-9604 need refrigerating after mixing?
Reconstituted peptide solutions are generally kept refrigerated, and bacteriostatic water contains benzyl alcohol specifically so a vial can be entered more than once over a period of days. Dry powder is more stable than solution. The vial expiry calculator on this site works out how many doses fit inside whatever window you are using.
Is AOD-9604 approved for human use?
No. It was investigated as an obesity treatment and did not reach approval, so there is no label and no official dosing guidance. It is sold for research use and is prohibited in tested sport. The calculator converts numbers you supply and makes no claim about whether a dose is appropriate.
Sources
Where this comes from
Regulatory status and approved dosing are quoted from the primary source rather than summarised from memory. Each link below says what it is being cited for.
- Drugs@FDA: FDA-Approved DrugsU.S. Food and Drug AdministrationApproval status and approval history for any drug marketed in the United States.Link checked 1 October 2026
- The Prohibited ListWorld Anti-Doping AgencyThe current list of substances prohibited in tested sport, including peptide hormones and growth factors.Link checked 1 October 2026
- Bulk Drug Substances Used in Compounding Under Section 503A of the FD&C ActU.S. Food and Drug AdministrationThe three-category framework FDA applies to substances nominated for pharmacy compounding.Link checked 1 October 2026
VialClock
This page calculates. Your notes app forgets.
Every tool here is stateless by design. What it cannot do is remember that your vial was mixed eleven days ago, or that a step-up is due this week.
This tool performs arithmetic on figures you enter, or presents a manufacturer-published schedule. It does not know your protocol, will never suggest a dose, and is not medical advice. Dosing decisions belong with a qualified prescriber.