MK-777_Dosage, benefits & legal status
Also known as Acetamoren, MK777, MK-ULTRA
Sold as the next MK-677. No published study, and no source we could confirm.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is MK-777?
Plain language first. The technical label stays, but it never stands alone.Overview
It is sold as a cleaner version of MK-677, and there is no published research on it at all.
What it's used for
A vendor-introduced growth hormone secretagogue with no peer-reviewed literature, listed here because it is being sold, not because it is characterized.
How does MK-777 work?
What it does in the body, and where.We cannot describe a mechanism for this one, because nobody has published what the molecule is.
- 01The claim is that it agonises the ghrelin receptorThe same target as MK-677, which is genuinely well characterized and has a published receptor structure.
- 02The claimed improvements are selectivity and fewer side effectsSpecifically less appetite increase and less effect on blood sugar. No data supports either claim.
- 03One vendor page gives a CAS number and molecular formulaWe could not corroborate them in any chemical database, patent filing or peer-reviewed source. A single seller asserting a structure is not characterization.
- 04This page exists to say thatThe name is on sale, so a reader searching it should find something. What they should find is that there is nothing to find.
What else is it used for?
Each use below carries its own evidence level. Approved means regulators have cleared it for that purpose. Investigational means it is in trials. Early research means it is being studied and is not established.
- Raising growth hormone and IGF-1, as claimedResearch only
- Muscle, sleep and recovery, as soldResearch only
The published record
0
Papers and trials about MK-777
Europe PMC was searched on 12 October 2026 and returned nothing.
Counted from Europe PMC indexing, not read by a person.
At a glance
Four things to know about MK-777
How much, and do you cycle it?
The range, and whether you take breaks.No established dose, no established schedule. No established schedule No range
Nothing has been studied, so nothing can be recommended. Schedules quoted online are copied from MK-677 and applied to a different name.
UnknownNo figure
No pharmacokinetic data of any kind has been published for this compound, in any species.
You can compare this against the whole library to see where it sits.
What does it cost?
Typical dose and cost, in plain numbers.MK-777 is not injected
It is taken by mouth (oral). No dose exists because no study exists. Vendor listings vary widely and are not anchored to anything. We do not carry a range, and the calculator does not run on this page.
We track MK-777 at 2 vendors, and all publish a price.
3 listings, last read Oct 10, 2026. Shipping and card fees are not included.
How do you store it?
Before mixing, and after.Room temperature. Cool, dry, out of light.
MK-777 is taken as a pill or capsule. Keep it in its original container at room temperature, away from heat, humidity, and direct sun. No fridge or mixing needed. Check the expiration date on the bottle.
What are the side effects and cautions?
Known cautions and warnings for this compound.Who should avoid it
- Anyone, on the basis that a compound with no published characterization cannot have its risks assessed
- Pregnancy and breastfeeding
- Children
- Would be banned in drug-tested sport if it is what it claims to be, since the whole secretagogue class is prohibited
Stop and get help
- Any new or unexplained symptom
- Shortness of breath or swelling in the legs and ankles
- Signs of high blood sugar such as constant thirst or blurred vision
- Signs of an allergic reaction such as face or throat swelling, hives, or trouble breathing
Common effects
- Unknown
- No published human data
- No published animal data
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is MK-777 approved?
And where the numbers on this page come from.No. MK-777 is not approved for any use, anywhere. It is sold labeled for laboratory research only, and there is no legal route to buy it for human use.
- Approval statusResearch only
- RouteBy mouth (oral)
- Checked24 August 2026
- DoseFrom community reports. No regulator or trial established this dose.
- Vial sizeFrom what vendors typically list; not a recommendation.
- Sources
What has happened recently
Not approved anywhere, and unlike most compounds at this tier there is no research program behind it either. It appears to have been introduced by sellers around 2024 and 2025 as a successor product to MK-677. Note what happened to its predecessor: ibutamoren mesylate sits in category 2 of the FDA's 503A nominated bulk substances list, meaning the agency has identified significant safety risks. A compound marketed as an improved version of it, with no published characterization, does not inherit an improved safety position.
Banned in drug-tested sport. Most research peptides are prohibited under WADA's S0 category, which covers any substance with no approval from any regulatory authority for human use. That means a compound can be banned without ever being named on the prohibited list. Check with your own anti-doping authority rather than assuming absence from the list means permitted.
You can compare this against the whole library, or read how to check a seller.
What else is like MK-777?
Others in Growth hormone peptides, side by side.If you're weighing MK-777, it's worth reading Sermorelin + Ipamorelin blend, Anamorelin, and GHRP-1 in the same class.
Sold as the next MK-677. No published study, and no source we could confirm.
- Dose
- No established dose
- How often
- No established schedule
The entry-level clinic combo, with one legal half and one that is not.
- Dose
- 0.2 up to 0.5 mg sermorelin per dose (the ipamorelin follows your ratio)
- How often
- Nightly
An oral ghrelin agonist approved in Japan for cancer wasting, and turned down in the US.
- Dose
- Set by prescription where approved
- How often
- Daily
The seven-amino-acid member of the family, studied early and then left behind.
- Dose
- Research only
- How often
- Not established
Guides for this compound
- mcg vs mg: The Peptide Dosing Mistake to Avoid
Your vial says mg and your protocol says mcg. Here is the conversion and how to check it.
- How to Read a Peptide COA
What the purity number does and does not tell you, and how to spot an edited report.
- How to Vet a Peptide Vendor
Independent COAs, HPLC purity, and the red flags that mean walk away.
Sources
- FDA, bulk drug substances nominated for use in compounding under section 503A(2026)Ibutamoren mesylate, the predecessor compound, listed in category 2 as raising significant safety risks.