Peptide Name
MOTS-c
Updated April 2026
Written by Garret Grant
Founder & Lead Researcher · B.S. Civil Engineering, UCLA
Last updated: April 2026
Complete Dosing & Safety Guide for MOTS-c, a Mitochondrial-Derived Peptide Used in Metabolic Research, covering community dosing schedules, reconstitution math, exercise-signaling rationale, and current human-evidence limits.
Half-life
~1-2 hours circulating (estimated)
Dose range
5-10 mg bolus or 0.2-1 mg/day
Status
Not FDA-approved
WADA
Prohibited (AMPK activator)
Need to calculate reconstitution and dosing units? Use the calculate injection units.
Peptide Name
MOTS-c
Use Case
Research users commonly explore MOTS-c for mitochondrial, metabolic, and endurance-capacity support.
Aliases
Mitochondrial Open Reading Frame of the 12S rRNA type-c; MOTS-c peptide
Category / Class
Mitochondrial-Derived Peptide (MDP)
Half-Life
~1-2 hours circulating (estimated); intracellular and tissue persistence remains uncertain
Dosing Frequency
Daily low-dose protocols or intermittent bolus protocols
Dose Range
5-10 mg per injection (community bolus); 0.2-1 mg/day for low-dose daily approaches
Titration Schedule
Bolus: 5 mg every 5 days; intermittent: 5 mg 2x weekly -> 5-10 mg 2-3x weekly; low-dose daily: 200 mcg/day -> +200 mcg every 2 weeks -> 1 mg/day
Common Vial Sizes
5mg, 10mg
Route of Administration
Subcutaneous (SubQ)
Regulatory Status
Unregulated research compound. Not FDA-approved. FDA lists MOTS-c as ineligible for compounding. Prohibited by WADA under S4.4.1 (AMPK activators).
Key Stat
Old mice treated with MOTS-c doubled treadmill running time and outperformed middle-aged comparators in the 2021 Nature Communications study.
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MOTS-c dosing protocol research centers on a peptide your body already makes - one that may play a key role in how your cells handle metabolic stress, energy production, and aging. MOTS-c is a 16-amino acid peptide first described in 2015 by Dr. Pinchas Cohen and colleagues. It belongs to a family called mitochondrial-derived peptides (MDPs), which also includes Humanin and SHLP-family peptides.
What makes MOTS-c unusual is where it comes from. Most peptides are coded by DNA in the cell's nucleus. MOTS-c is coded by DNA inside the mitochondria - the structures that generate energy in every cell. Think of it as a signal flare sent from your cell's power plant to the rest of the cell, telling it to adapt when energy demand is high.
In preclinical research, MOTS-c activates a key energy-sensing pathway called AMPK, which helps cells take in glucose, burn fat, and adapt to metabolic stress. Animal studies have shown improvements in insulin sensitivity, body-composition markers, and age-related physical decline. In one notable study, old mice treated with MOTS-c doubled their treadmill running time.
MOTS-c is not FDA-approved and has no completed efficacy trial of the native peptide in humans. The most relevant human data comes from CB4211, an analog that completed Phase 1a/1b development. This page is educational and research-reference only.
MOTS-c works through several overlapping pathways - not just one. Here is what each pathway does and why researchers find it interesting.
MOTS-c triggers your cells' built-in energy sensor, a pathway called AMPK. Think of AMPK as a fuel gauge: when energy is low, AMPK flips on and tells cells to pull in more glucose, burn stored fat, and make mitochondria work more efficiently. MOTS-c activates AMPK by interfering with folate and purine metabolism, which causes a molecule called AICAR to build up - and AICAR is one of AMPK's natural "on" switches.
When your body is under metabolic stress - exercise, fasting, or energy depletion - MOTS-c can physically move from the cell's cytoplasm into the nucleus, where it turns on genes involved in stress adaptation and antioxidant defense. This mitochondria-to-nucleus communication is one of the features that makes MOTS-c unique among peptides.
Myostatin is a protein that limits muscle growth - the more myostatin activity you have, the harder it is to build or keep muscle. Research has linked MOTS-c to reduced myostatin signaling, which supports the idea that MOTS-c may help preserve muscle mass during aging or in obesity contexts.
MOTS-c activates many of the same pathways that exercise does - improved endurance, better metabolic flexibility, and enhanced stress tolerance. In animal studies, MOTS-c-treated mice showed physical performance gains that overlapped with exercise-trained comparators.
Together, these pathways position MOTS-c as a metabolic-stress adaptation peptide rather than a single-target compound. It works across energy sensing, gene regulation, muscle preservation, and exercise-like signaling simultaneously.
MOTS-c has no clinically established dosing standard - all protocols below are community-derived from practitioner and self-experimenter experience. Three main approaches exist, and the right one depends on your goals and comfort level:
The table below shows all three approaches with week-by-week schedules.
Bolus protocol (common)
Weeks 1-3
5 mg every 5 days
Four injections total over 20 days. Morning dosing and pre-exercise timing are commonly used.
Bolus rest period
Weeks 4-28
No dosing
Minimum 4-week off period. Many protocols limit repeats within a 6-month window.
Intermittent initiation
Weeks 1-2
5 mg, 2x weekly
Conservative tolerance check before escalating frequency or dose.
Intermittent maintenance
Weeks 3-4
5-10 mg, 2-3x weekly
Escalate only if well tolerated. Monitor glucose if combined with other AMPK-active strategies.
Low-dose daily initiation
Weeks 1-2
200 mcg daily
Start-low model based on allometric and half-life considerations.
Low-dose escalation
Weeks 3-8
+200 mcg every 2 weeks
Typical progression: 400 mcg, 600 mcg, 800 mcg, then 1,000 mcg daily max in this framework.
Low-dose maintenance
Weeks 9-12+
Up to 1 mg daily
May extend to 16 weeks in some protocols. Equal off-cycle is commonly used.
Evidence Level Notice and Dosing Notes
Evidence level: No completed human efficacy trial has established a definitive native MOTS-c dosing standard. Current schedules are preclinical plus community-derived.
Why multiple protocols: Bolus, intermittent, and low-dose-daily models exist because MOTS-c dosing practice developed outside a formal phase-3 titration framework.
Timing: Morning and pre-exercise administration are common because endogenous MOTS-c is exercise-inducible and linked to metabolic-stress signaling.
Drug interaction context: MOTS-c and metformin both activate the same energy-sensing pathway (AMPK). Using them together could amplify effects on blood sugar and metabolism. If you are taking metformin or other glucose-lowering medications, monitor your response closely.
Missed dose: Bolus protocols usually resume when remembered; intermittent protocols generally skip missed doses and continue regular schedule without double dosing.
The MOTS-c reconstitution table below shows you exactly how much bacteriostatic (BAC) water to add to your vial and how much liquid to draw for each dose. Start by finding your vial size in the left column, then choose how much BAC water you want to add - more water means a more dilute solution, which makes small doses easier to measure. Read across to find the draw volume and syringe units for your target dose. Entries marked with an asterisk (*) require a syringe larger than 1 mL.
Vial Size: 5 mg
BAC Water: 1.0 mL
Concentration: 5 mg/mL
10 mg: N/A (vial max 5 mg)
5 mg: 1.0 mL (100 units)
2.5 mg: 0.50 mL (50 units)
1 mg: 0.20 mL (20 units)
Vial Size: 5 mg
BAC Water: 2.0 mL
Concentration: 2.5 mg/mL
10 mg: N/A (vial max 5 mg)
5 mg: 2.0 mL (200 units*)
2.5 mg: 1.0 mL (100 units)
1 mg: 0.40 mL (40 units)
Vial Size: 10 mg
BAC Water: 1.0 mL
Concentration: 10 mg/mL
10 mg: 1.0 mL (100 units)
5 mg: 0.50 mL (50 units)
2.5 mg: 0.25 mL (25 units)
1 mg: 0.10 mL (10 units)
Vial Size: 10 mg
BAC Water: 2.0 mL
Concentration: 5 mg/mL
10 mg: 2.0 mL (200 units*)
5 mg: 1.0 mL (100 units)
2.5 mg: 0.50 mL (50 units)
1 mg: 0.20 mL (20 units)
Vial Size: 10 mg
BAC Water: 3.0 mL
Concentration: 3.33 mg/mL
10 mg: 3.0 mL (300 units*)
5 mg: 1.50 mL (150 units*)
2.5 mg: 0.75 mL (75 units)
1 mg: 0.30 mL (30 units)

No one has formally studied MOTS-c side effects in a human clinical trial. What we know about safety comes from three sources: animal studies, an early-stage trial of CB4211 (a modified version of MOTS-c), and self-reports from the research community. This means side effect data is limited and may not capture rare or long-term risks.
Injection-site effects: Most common reports include transient redness, swelling, bruising, and in analog programs occasional persistent nodules.
Metabolic effects: Headache, lightheadedness, or appetite change can occur, especially during fasting or when combined with other glucose-lowering strategies.
USADA-reported signals: Self-experimenter reports include palpitations, insomnia, fever, and local irritation; long-term safety remains unknown.
Drug interaction caution: MOTS-c and metformin both activate the same energy-sensing pathway (AMPK). Using them together could amplify effects on blood sugar and metabolism. If you are taking metformin or other glucose-lowering medications, monitor your response closely.
Contraindication context: Formal contraindications are not established, but regulatory status and pathway breadth warrant conservative use boundaries in research settings.
Most of what we know about MOTS-c comes from animal studies and lab experiments - not human clinical trials. The table below summarizes the key published research. The most important thing to note: no study has yet tested native MOTS-c as a treatment in humans. The closest human data comes from CB4211, a modified version (analog) of MOTS-c that completed an early-stage safety trial. Animal results have been promising - particularly for metabolic health and physical performance in aging - but animal results do not always translate to humans.
Lee et al. 2015
Preclinical • 7-8 weeks
HFD and aged mouse models
MOTS-c prevented diet-induced obesity trends and improved insulin-resistance markers in mouse models.
Reynolds et al. 2021
Preclinical + human observational • 2-8 weeks in mice
Young, middle-age, and old mice; human exercise sampling
Old mice showed major endurance gains; exercise sharply increased endogenous human skeletal-muscle MOTS-c.
CB4211 Phase 1a/1b (NCT03998514)
Phase 1a/1b analog trial • 7 to 28 days
Healthy adults and obese subjects with NAFLD
Daily SubQ analog dosing was reported as generally well tolerated with favorable liver-enzyme and glucose trends.
Kim et al. 2019
Preclinical • Model-dependent
Diet-induced obesity mouse model
Improved insulin sensitivity and favorable plasma-metabolite profile shifts in obesity-linked pathways.
Kumagai et al. 2021
Preclinical + human correlation • Model-dependent
Obese mice and human blood correlation data
Reduced myostatin signaling with inverse relationship between circulating MOTS-c and myostatin.
Ming et al. 2016
Preclinical • 12 weeks
Ovariectomized mice
MOTS-c dosing reduced bone-loss markers through AMPK-associated pathways.
Kong et al. 2025
Preclinical + human correlation • Variable
Aged and diabetic models plus human serum analyses
Reported islet-cell senescence protection and lower circulating MOTS-c in type-2 diabetes cohorts.
Fuku et al. 2015
Genetic association • Observational
Japanese longevity cohorts
Mitochondrial-region variants linked to exceptional longevity hypotheses.
Native MOTS-c has not completed a formal human treatment trial. The closest human data comes from CB4211, a MOTS-c analog that completed Phase 1a/1b testing and showed favorable safety signals and encouraging trends in liver enzymes and glucose. The animal data is strong - especially for metabolic health and exercise capacity - but a clear gap remains between preclinical promise and proven human benefit. As of April 2026, no active MOTS-c or MOTS-c analog trials are registered on ClinicalTrials.gov.
Lyophilized (powder)
-20C or below
12+ months
Lyophilized (powder)
2-8C
Several months
Lyophilized (powder)
Room temperature
Weeks (shipping tolerance)
Reconstituted
2-8C
Up to 7 days
Reconstituted aliquots
-20C
2-3 months
Protect from light, avoid repeat freeze-thaw cycles, and favor small aliquots for planned use windows. MOTS-c is a short peptide and may lose activity faster in solution than larger compounds.
MOTS-c is one of three mitochondria-related peptides that come up frequently in longevity and metabolic research. The table below compares them side by side. The key takeaway: all three involve mitochondria, but they work in very different ways and target different problems. MOTS-c is focused on metabolic adaptation and exercise-like signaling, Humanin on protecting brain cells from stress-related death, and SS-31 on stabilizing mitochondrial membranes in disease states.
Origin
MOTS-c: Mitochondrial DNA (12S rRNA)
Humanin: Mitochondrial DNA (16S rRNA)
SS-31 (Elamipretide): Synthetic designed tetrapeptide
Size
MOTS-c: 16 amino acids (~1,915 Da)
Humanin: 24 amino acids (~2,687 Da)
SS-31 (Elamipretide): 4 amino acids (~640 Da)
Primary Mechanism
MOTS-c: Folate-AICAR-AMPK activation with nuclear signaling
Humanin: Anti-apoptotic signaling and stress-survival pathways
SS-31 (Elamipretide): Cardiolipin binding and mitochondrial membrane stabilization
Primary Focus
MOTS-c: Metabolic adaptation and exercise-mimetic context
Humanin: Neuroprotection and anti-apoptotic context
SS-31 (Elamipretide): Mitochondrial disease and membrane integrity
Clinical Depth
MOTS-c: No native trial; analog Phase 1a/1b
Humanin: Preclinical
SS-31 (Elamipretide): Advanced clinical development history
WADA Status
MOTS-c: Prohibited
Humanin: Not explicitly listed
SS-31 (Elamipretide): Not explicitly listed
MOTS-c, Humanin, and SS-31 are mechanistically distinct and are not interchangeable despite overlapping mitochondrial framing.
MOTS-c is generally positioned for metabolic and performance adaptation, while Humanin is more neuroprotective and SS-31 more membrane-structural.
Route, dose units, and trial maturity differ materially across all three compounds.
See the Humanin Protocol and SS-31 Protocol for compound-specific guides.
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Common community starts are 5 mg per injection using intermittent schedules, or 200 mcg daily in low-dose escalation frameworks. No clinically established native MOTS-c dose exists.
Circulating half-life is commonly estimated around 1-2 hours, but tissue persistence and downstream signaling duration may outlast plasma presence.
In animal studies, MOTS-c improved how cells handle energy - including better blood sugar control, favorable shifts in body composition, and significantly better physical endurance (old mice doubled their treadmill running time in one study). However, these results come from animals, not humans. No human efficacy trial has been completed for native MOTS-c, so expectations should be conservative. The closest human data comes from a modified version (CB4211) that showed encouraging but early-stage safety and metabolic signals.
A common setup is 10 mg with 1 mL BAC water (10 mg/mL), where 5 mg equals 0.50 mL or 50 units on a U-100 syringe. Inject diluent down the vial wall and refrigerate promptly.
No. MOTS-c is not FDA-approved for therapeutic use and is listed as ineligible for compounding by FDA guidance. It is also prohibited by WADA.
Most reported effects are injection-site irritation, occasional headache or lightheadedness, appetite changes, and in some reports palpitations or insomnia.
All three are mitochondria-related peptides, but they work differently. MOTS-c focuses on metabolic adaptation - helping cells handle energy stress and mimicking some effects of exercise. Humanin is focused on protecting cells (especially brain cells) from stress-related damage and death. SS-31 is a synthetic peptide that stabilizes mitochondrial membranes, primarily studied for mitochondrial diseases and heart failure. See the comparison table above for a detailed side-by-side breakdown.
5 mg and 10 mg lyophilized vials are the most common formats.
For 10 mg vials, 1 mL is common for bolus protocols; 2-3 mL setups are often used for finer low-dose measurement precision.
Preclinical doses in mice are far higher than common community schedules after allometric translation. Community protocols generally cap near 10 mg per injection.
Store refrigerated at 2-8C and target use within 7 days. For longer windows, aliquot and freeze at -20C before repeated access.
As of February 2026, there are no active registered MOTS-c or MOTS-c analog therapeutic trials on ClinicalTrials.gov.
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The information on this page is for educational and research reference purposes only. MOTS-c is an experimental research compound that is not FDA-approved for any indication. No compounds discussed on this site are intended for human consumption. This is not medical advice.
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