peptideNot FDA-approvedResearch chemicalNo published human or animal trials exist specifically for an "ibutamoren analog" — the cited studies are of the parent compound, ibutamoren (MK-677), for background onlySold in research-chemical markets without a disclosed, verifiable chemical identity
Ibutamoren AnalogBenefits, Dosage & Interactions
Ibutamoren analog, also known as MK-677 or Nutrobal, is a non-peptide, orally active growth hormone secretagogue. This means it stimulates the body's own pituitary gland to release growth hormone (GH). Research on Ibutamoren Analog focuses on muscle and strength and sleep quality.
Researched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
Evidence: Preclinical — Animal and in-vitro studies only, no published human RCTs.
Evidence strengthPreclinical · 1/4
PreclinicalStrong human evidence
Animal and in-vitro studies only, no published human RCTs.
Plasma half-life
~24 h
Default unit
mg
Mixing Ibutamoren Analog: bacteriostatic water and syringe units
The vial arrives as dry powder. How much water you add sets the strength, and the strength sets the mark you draw to on the syringe. The table assumes a 5 mg vial and a 250 mcg example draw on a U-100 insulin syringe, where 100 units is one millilitre. If your vial is a different size, scale it — the arithmetic is the same.
| Bacteriostatic water added | Resulting strength | 250 mcg draws to |
|---|---|---|
| 1 mL | 5 mg/mL | 5 units |
| 2 mL | 2.5 mg/mL | 10 units |
| 3 mL | 1.67 mg/mL | 15 units |
Units, not millilitres. Insulin syringes are marked in units, and mixing up mcg and mg on a peptide label is the single most common error people report. Check the label twice. Run your own vial through the calculator.
Storage and stability
- Before mixing
- Sealed and still as a dry powder, Ibutamoren Analog vials are normally kept in the fridge at 2–8 °C, out of light. Short spells at room temperature during shipping are the norm for lyophilized peptides and are not, on their own, a sign the vial is spoiled.
- After mixing
- Once bacteriostatic water goes in, the vial belongs in the fridge and is generally treated as good for about 28 days — that is how long the benzyl alcohol in bacteriostatic water is relied on to hold back bacterial growth. Plain sterile water has no preservative, so a vial mixed with it is a single-session vial. Never freeze a reconstituted vial.
- When to throw it out
- A properly mixed vial is clear. Cloudiness, floating strands, a color change or powder that will not go into solution after gentle swirling all mean the vial should be discarded rather than used. Shaking a peptide vial hard is the usual cause — swirl it, or run the water down the inside wall of the vial instead of onto the powder.
Handling and shelf-life figures describe general practice for lyophilized peptides. They are not a dose and not medical advice — your prescriber or the product label sets the amount.
References & evidence
Documents the Ibutamoren Analog entry is written from. Each number matches an inline marker above.
- [1]Oral ghrelin receptor agonist MK-0677 increases serum insulin-like growth factor 1 in hemodialysis patients: a randomized blinded studyCampbell GA, Patrie JT, Gaylinn BD, Thorner MO, Bolton WK · Nephrology Dialysis Transplantation · 2018 · Peer-reviewed · PMID 28340044
- [2]The effects of MK-0677, an oral growth hormone secretagogue, in patients with hip fractureBach MA, Rockwood K, Zetterberg C, Thamsborg G, Hébert R, Devogelaer JP, Christiansen JS, Rizzoli R, Ochsner JL, Beisaw N, Gluck O, Yu L, Schwab T, Farrington J, Taylor AM, Ng J, Fuh V · Journal of the American Geriatrics Society · 2004 · Peer-reviewed · PMID 15066065
- [3]Growth hormone secretagogue MK-677: no clinical effect on AD progression in a randomized trialSevigny JJ, Ryan JM, van Dyck CH, Peng Y, Lines CR, Nessly ML · Neurology · 2008 · Peer-reviewed · PMID 19015485
What is Ibutamoren Analog studied for?
What is Ibutamoren Analog?
Ibutamoren analog, also known as MK-677 or Nutrobal, is a non-peptide, orally active growth hormone secretagogue. This means it stimulates the body's own pituitary gland to release growth hormone (GH). It was originally developed to treat conditions such as growth hormone deficiency, osteoporosis, obesity, and muscle wasting. Unlike synthetic growth hormone, ibutamoren analog does not directly introduce exogenous GH into the body; instead, it acts on specific receptors to promote the natural pulsatile release of GH.
What does the research say about Ibutamoren Analog?
Tap a section to expand.
Ibutamoren analog (MK-677) acts as a ghrelin receptor agonist. Ghrelin is a naturally occurring hormone known as the 'hunger hormone' because it stimulates appetite. More importantly, ghrelin also plays a crucial role in regulating growth hormone secretion from the pituitary gland. MK-677 binds to the ghrelin receptor (also known as the growth hormone secretagogue receptor, GHSR1a) in a way that mimics ghrelin's action. This binding leads to a cascade of events that ultimately signal the pituitary gland to increase its release of growth hormone. Unlike growth hormone releasing hormone (GHRH) analogs, MK-677 works by increasing the amplitude and frequency of GH pulsatile release, rather than just the amplitude. It also enhances the signaling pathways that lead to GH secretion and reduces the signaling of somatostatin, a hormone that inhibits GH release. By influencing these pathways, MK-677 can lead to sustained increases in both growth hormone levels and subsequently, insulin-like growth factor 1 (IGF-1) levels in the body (PubChem, DrugBank).
Research into ibutamoren analog (MK-677) has explored several potential benefits due to its growth hormone-stimulating effects, primarily related to body composition and metabolic health.
* **Increased Muscle Mass and Strength:** Studies in subjects with growth hormone deficiency or elderly individuals have shown that MK-677 can lead to increases in lean body mass and may improve muscle strength (Cochrane, NIH ODS).
* **Bone Mineral Density:** MK-677 has been investigated for its potential to improve bone mineral density, particularly in older adults, by promoting bone formation (NIH ODS).
* **Improved Sleep Quality:** Some research suggests that MK-677 may enhance sleep quality by increasing REM sleep duration (NIH ODS).
* **Fat Loss:** By increasing growth hormone and IGF-1 levels, MK-677 may contribute to a more favorable body composition by potentially reducing body fat, though this effect is often secondary to lean mass gains (NIM ODS).
* **Skin and Hair Health:** Growth hormone and IGF-1 are involved in tissue regeneration and collagen synthesis, which some suggest could positively impact skin elasticity and hair quality, though direct clinical evidence for this specific benefit from MK-677 is less robust (NIH ODS).
It is important to note that many of these studies are preliminary or conducted in specific populations, and further research is ongoing.
Evidence for ibutamoren analog (MK-677) comes from various clinical trials and research studies. For instance, a randomized, double-blind, placebo-controlled study published in the *Journal of Clinical Endocrinology & Metabolism* investigated the effects of MK-677 on body composition in healthy older adults, demonstrating an increase in lean body mass. Another significant review, found in the *Cochrane Library*, analyzed several studies on growth hormone secretagogues, including MK-677, confirming their ability to increase growth hormone and IGF-1 levels and noting potential benefits for muscle mass in specific populations. Research cited by PubChem and DrugBank details its pharmacological properties and mechanism of action. The NIH Office of Dietary Supplements (ODS) also references studies on MK-677's effects on growth hormone, IGF-1, and body composition. While numerous studies have explored its effects, much of the research pertains to specific disease states or age groups, and its use outside of these contexts lacks comprehensive, long-term human safety and efficacy data from large-scale clinical trials (PubChem, DrugBank, NIH ODS, Cochrane).
Commonly reported side effects of ibutamoren analog (MK-677) typically relate to its effects on growth hormone and IGF-1 levels. These can include:
* Increased appetite
* Mild peripheral edema (swelling of hands and feet)
* Muscle pain or cramps
* Joint pain (arthralgia)
* Lethargy or drowsiness
* Numbness or tingling sensation (paresthesia)
* Temporary, mild increases in fasting glucose levels and insulin resistance, particularly at higher doses or with prolonged use.
Less common but more serious side effects may include:
* Potential for exacerbation of pre-existing insulin resistance or metabolic syndrome.
* Hypokalemia (low potassium levels).
This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Individuals considering ibutamoren analog (MK-677) should be aware of several warnings. Due to its impact on growth hormone and IGF-1, it can affect glucose metabolism, potentially leading to increased blood sugar and insulin resistance. Individuals with a history of diabetes or pre-diabetes should exercise extreme caution and monitor blood glucose levels closely. There is also a theoretical concern that sustained elevations of IGF-1 could potentially stimulate the growth of certain cancers, though this remains an area of ongoing research and concern, not definitively proven for MK-677 in humans. Long-term safety data for MK-677 is still limited, especially concerning prolonged use in healthy individuals. The compound is not approved by the FDA for human use and is often found in the research chemical market (FDA). Therefore, its quality, purity, and concentration cannot be guaranteed. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Ibutamoren analog (MK-677) is contraindicated in individuals with known hypersensitivity to the compound or any of its components. Due to its effects on glucose metabolism, it is strongly advised against use in individuals with uncontrolled diabetes mellitus. Pregnant or breastfeeding women should not use MK-677 due to a lack of safety data and potential effects on fetal or infant development. Children and adolescents should also avoid MK-677 as its effects on growing bodies are not fully understood. Individuals with existing cancer or a history of cancer should generally avoid compounds that increase growth factors like IGF-1, as there is a theoretical risk of promoting cancer cell growth (though not definitively established for MK-677). Individuals with liver or kidney impairment should also approach with extreme caution, as the metabolism and excretion of the compound may be altered. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Given its impact on various bodily systems, ibutamoren analog (MK-677) should not be mixed without careful consideration and medical supervision. Potential interactions may exist with:
* **Insulin and Oral Hypoglycemics:** Due to its potential to increase blood glucose and insulin resistance, MK-677 could necessitate adjustments in the dosages of insulin or other diabetes medications. Concurrent use without monitoring could lead to hyperglycemic events.
* **Corticosteroids:** These drugs can inhibit growth hormone secretion and increase blood glucose, potentially counteracting MK-677's effects and exacerbating glucose dysregulation.
* **Thyroid Hormones:** Changes in growth hormone and IGF-1 levels can influence thyroid hormone metabolism, though direct clinical interactions with MK-677 are not well-established.
* **Other Growth Hormone Secretagogues or Releasing Hormones:** Combining MK-677 with other compounds that stimulate growth hormone release could lead to excessively high GH/IGF-1 levels, increasing the risk of side effects.
This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
The typical timing for ibutamoren analog (MK-677) is user-directed and must be set by a licensed clinician. It can be taken at any time of day, as its half-life is approximately 24 hours (DrugBank), allowing for once-daily dosing. Some users prefer intake in the evening or before bed, theorizing it might coincide with the natural pulsatile release of growth hormone during sleep and potentially aid sleep quality. However, scientific literature does not mandate specific timing for efficacy. It can be taken with or without food.
Put it into practice
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What interacts with Ibutamoren Analog?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any peptide + hormone | Note | Category ruleConfidence: theoretical | Injectable peptides plus hormones can have overlapping or compounding effects that aren't always well characterized.Source pending | Track bloodwork with a provider; don't assume combinations are neutral. |
Frequently asked questions about Ibutamoren Analog
Ibutamoren analog, or MK-677, is a non-peptide compound that functions as a growth hormone secretagogue. It stimulates the body's pituitary gland to release more growth hormone, subsequently increasing insulin-like growth factor 1 (IGF-1) levels.
No, MK-677 is not a steroid. It is a ghrelin mimetic and a growth hormone secretagogue. It does not exert its effects through androgen receptors like anabolic steroids do.
Common side effects can include increased appetite, mild water retention (edema), muscle or joint pain, lethargy, and temporary increases in fasting blood glucose levels. Serious side effects are rarer but include concerns about insulin sensitivity.
While some immediate effects like increased appetite may be noticed quickly, changes in body composition (e.g., lean muscle mass, fat reduction) and bone mineral density take weeks to months of consistent use to become apparent, as these processes are gradual and dependent on sustained elevated growth hormone and IGF-1 levels (NIH ODS).
MK-677 is not approved by the FDA for human consumption and is often sold as a 'research chemical.' Its legal status can vary by country and context (e.g., research vs. dietary supplement). It is often banned in competitive sports under anti-doping regulations.
As a peptide, Ibutamoren Analog can overlap with other supplements, prescription medicines, hormones and peptides. With a reported plasma half-life near 24 hours, separating doses can change the picture as much as removing one. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Ibutamoren Analog with no sign-up.
The reported plasma half-life is about 24 hours, which is what drives how often it is redosed. Amounts for this peptide vary by protocol, formulation and individual response, so follow the dose your clinician or the product label specifies.
Whether Ibutamoren Analog fits alongside testosterone replacement therapy depends on the protocol — dose, ester and ancillaries such as HCG or anastrozole — and on current bloodwork. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
"Peptides" is not one category — healing peptides, GLP-1 agonists, growth-hormone secretagogues and melanocortins each behave differently next to Ibutamoren Analog. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
With a plasma half-life near 24 hours, once-daily dosing is the usual pattern for Ibutamoren Analog. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
With a plasma half-life near 24 hours, a single missed dose of Ibutamoren Analog usually has a smaller effect on overall exposure than an irregular pattern of missed doses does. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Ibutamoren Analog the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Verify at
Publisher search links for Ibutamoren Analog. These are places to check the information — they are not citations, so they are not numbered.
- PubChem(publisher search, opens in a new tab)National Center for Biotechnology Information · publisher search
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- FDA-approved labeling (DailyMed)(publisher search, opens in a new tab)U.S. Food and Drug Administration · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Ibutamoren Analog?
Plain-text summary, safe to quote verbatim:
Ibutamoren analog, also known as MK-677 or Nutrobal, is a non-peptide, orally active growth hormone secretagogue. This means it stimulates the body's own pituitary gland to release growth hormone (GH). Research on Ibutamoren Analog focuses on muscle and strength and sleep quality.
Source: DoseRoutine — https://doseroutine.com/library/ibutamoren-analog
Ibutamoren Analog cheat sheet
DoseRoutine cheat sheet · Peptide
Ibutamoren Analog
Ibutamoren analog, also known as MK-677 or Nutrobal, is a non-peptide, orally active growth hormone secretagogue. This means it stimulates the body's own pituitary gland to release growth hormone (GH).
Evidence
Preclinical
Animal and in-vitro studies only, no published human RCTs.
Half-life
~24 h
Not FDA-approvedResearch chemicalNo published human or animal trials exist specifically for an "ibutamoren analog" — the cited studies are of the parent compound, ibutamoren (MK-677), for background onlySold in research-chemical markets without a disclosed, verifiable chemical identityMuscleSleep
Key references
- Oral ghrelin receptor agonist MK-0677 increases serum insulin-like growth factor 1 in hemodialysis patients: a randomized blinded study (2018)
- The effects of MK-0677, an oral growth hormone secretagogue, in patients with hip fracture (2004)
- Growth hormone secretagogue MK-677: no clinical effect on AD progression in a randomized trial (2008)
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/ibutamoren-analog
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Ibutamoren Analog — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/ibutamoren-analog
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