Buy MOTS-c: Mitochondrial Peptide for Laboratory Research

MOTS-c is one of the most discussed discoveries in peptide research over the past decade. As an early mitochondrially encoded peptide with metabolic effects demonstrated mainly in preclinical models, it helped define a research category known as Mitochondria-Derived Peptides (MDPs). What makes MOTS-c particularly interesting is its description as a so-called exercise-mimetic: in animal studies it activates signaling pathways normally triggered by physical exercise.

MOTS-clongevity

Mitochondrial-derived signaling peptide (16 amino acids) that mimics the effects of exercise at the cellular level. Activates AMPK, improves glucose uptake, and enhances fat metabolism - a key tool in metabolic and longevity research.

What Is MOTS-c?

MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA Type-c) is a 16-amino acid peptide encoded by the mitochondrial genome - specifically from the 12S rRNA gene of mitochondrial DNA. The sequence is:

Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg

MOTS-c was discovered and first described in 2015 by Changhan Lee and colleagues at the University of Southern California. The discovery was significant because it demonstrated that mitochondria are not merely energy suppliers but actively produce signaling peptides that regulate overall metabolism.

Unlike most known peptides, MOTS-c is not encoded in the nucleus but in the mitochondria - an indication of an evolutionarily conserved signaling function that may trace back to the ancient symbiosis between mitochondria and eukaryotic cells.

Why Is MOTS-c Being Researched?

The body of research on MOTS-c has grown rapidly in recent years. Several high-profile publications have placed the peptide at the center of longevity and metabolism research.

Key Studies

Reynolds et al. (2021, Nature Communications): In separate mouse experiments, MOTS-c was administered to young, 12-month-old and 22-month-old mice, with improvements in physical-performance endpoints and changes in exercised skeletal-muscle metabolism. In a separate observational human arm, acute exercise increased endogenous MOTS-c in skeletal muscle and plasma; no MOTS-c was administered to those participants.

Kim et al. (2019, Physiological Reports): In diet-induced obese mice, three days of MOTS-c administration altered plasma metabolite pathways and lowered blood glucose relative to controls; insulin and leptin only trended lower. The aged-mouse insulin-sensitivity finding discussed in the paper came from earlier work, not from this 2019 experiment.

Yi et al. (2023, Frontiers in Physiology): This review summarized preclinical literature on MOTS-c and bone metabolism and cited earlier work reporting higher serum and skeletal-muscle MOTS-c after eight weeks of aerobic training in mice. The review did not itself establish that effect.

Dieli-Conwright et al. (2021, Scientific Reports): In a secondary analysis of breast-cancer survivors, a 16-week combined exercise intervention increased circulating MOTS-c in the non-Hispanic White subgroup but not the Hispanic subgroup. The study did not genotype mtDNA or establish that mtDNA variation caused the difference.

Mechanisms of Action

Preclinical studies have proposed several mechanisms for MOTS-c, including the folate-purine-AICAR-AMPK axis, stress-induced nuclear signaling and direct, tissue-specific regulation of CK2 reported by Kumagai et al. in 2024. Their relevance to administered MOTS-c in humans is unknown:

1. AMPK Activation: MOTS-c activates AMP-activated protein kinase (AMPK), the central energy sensor of the cell. AMPK regulates glucose and lipid metabolism, stimulates mitochondrial biogenesis, and inhibits energy-consuming processes.

2. Folate Cycle Modulation: MOTS-c influences the folate cycle and thereby de novo purine biosynthesis. This leads to the accumulation of AICAR (5-aminoimidazole-4-carboxamide ribonucleotide), an endogenous AMPK activator.

3. Nuclear Translocation: In cultured cells under metabolic stress, MOTS-c translocated to the nucleus, regulated genes containing antioxidant response elements (ARE) and interacted with ARE-regulating transcription factors including NRF2.

4. Insulin Sensitization: MOTS-c enhances glucose uptake in skeletal muscle cells and increases insulin sensitivity - a mechanism that mimics the metabolic effects of physical exercise.

5. Inflammation Modulation: Recent data suggest that MOTS-c also possesses anti-inflammatory properties, potentially through the regulation of NF-κB and inflammatory cytokines.

Quality Criteria When Purchasing

MOTS-c is a relatively small peptide (16 amino acids) that must be precisely synthesized. What researchers should look for:

• HPLC purity on the batch CoA: Deletion or insertion peptides can compromise research results, so check the reported HPLC purity on the current batch certificate and set an acceptance threshold appropriate to your experiment rather than relying on a single fixed number.
• Mass spectrometry: An intact-mass result consistent with the expected mass supports identity, but does not by itself prove the exact sequence, stereochemistry or purity; interpret it with the method details and HPLC result.
• Which lab, and what was tested: MOTS-c batches come with a manufacturer-supplied Janoshik report, and some batches also carry community-submitted results (for example BT Labs, Kovera or Freedom Diagnostics). PeptidesDirect did not commission or independently retest these; check which laboratory issued a given report and match its lot number to the vial. The current certificates are listed on our lab-reports page at /coa.

Dose Figures in the Research Literature

Animal models: In Reynolds et al. (2021, Nature Communications, PMID 33473109), mice received intraperitoneal MOTS-c at 5 or 15 mg/kg/day; age, duration and schedule differed by study arm, and the old-mouse physical-performance arm used 15 mg/kg/day for two weeks. That is what the study administered to animals.

Human research: Most human MOTS-c data to date are observational, measuring the body's own (endogenous) MOTS-c rather than administering the synthetic peptide. The only administered-MOTS-c human study, a phase 2a trial (ClinicalTrials.gov NCT07505745), was recruiting as of July 2026 with no efficacy results posted. No controlled, published human dosing protocol exists for MOTS-c, and the animal figures above do not convert into one.

Community research figures: Outside controlled trials, community research protocols circulate low-milligram subcutaneous ranges for MOTS-c, commonly cited around 5 to 10 mg per week divided across 2 to 3 administrations in reported cycles of 8 to 12 weeks. These figures come from self-reported community practice, not from controlled human trials; they carry no safety validation and are not a recommendation. They are noted here because researchers encounter them and ask, and the sourced, bounded facts above are the more reliable reference.

The figures in this section are a reference from the research literature and community discussion. They are not a dosage recommendation for any use.

Storage

MOTS-c is supplied as lyophilized powder:

• Before reconstitution: Follow the supplier's documented storage for the unopened lyophilized material (commonly kept cold and protected from light and moisture).
• After reconstitution: Post-reconstitution stability depends on salt form, solvent, concentration, container and storage conditions. No product-specific validated hold time or storage condition is cited here, so the allowable conditions and duration must be established for the chosen formulation and assay rather than inferred from generic storage advice.
• Reconstitution: Use the solvent, concentration and mixing procedure specified by a product-specific validated protocol for the intended assay; no universal MOTS-c procedure is established here.
• Freeze-thaw: Repeated freezing and thawing can degrade many peptides; where a protocol calls for frozen storage, single-use aliquots are preferable to refreezing a whole vial.

Why Buy MOTS-c from PeptidesDirect?

• Documented certificates: A manufacturer-supplied Janoshik report per batch, with community-submitted results on some batches, listed on our lab-reports page at /coa.
• Two sizes available: 10 mg for smaller projects and 40 mg for more extensive research protocols; current prices are shown on the product page.
• EU shipping: Shipped from within the EU customs territory, with tracked delivery; see the shipping page for current destination-specific estimates.

Frequently Asked Questions

MOTS-clongevity

Mitochondrial-derived signaling peptide (16 amino acids) that mimics the effects of exercise at the cellular level. Activates AMPK, improves glucose uptake, and enhances fat metabolism - a key tool in metabolic and longevity research.