Skip to content

Important Safety MOTS-c

MOTS-c Injection (Compounded Mitochondrial-Derived Peptide MOTS-c)


Important Safety Notice



THIS IS A CUSTOM PRESCRIPTION MEDICATION INTENDED ONLY FOR YOU.

What is MOTS-c?

MOTS-c is a lab-made version of a peptide (a chain of 16 amino acids, the building blocks of proteins) that your body makes naturally. It is made by mitochondria, the energy-producing parts of your cells, and is found in muscle and blood. It is given as an injection under the skin (subcutaneous). It is intended only for adults 18 years and older.


Important: MOTS-c is a compounded medication. It is NOT FDA-approved for any use, and no MOTS-c product is approved in any country. It has not been reviewed by the FDA for safety, effectiveness, or quality.


What it is studied for: In mice, MOTS-c reduced weight gain on a high-fat diet, improved how the body responds to insulin, and improved exercise capacity. Lab and rodent studies also suggest effects on bone. It appears to work partly through AMPK, a cell energy sensor that exercise also turns on. However, no studies have tested MOTS-c itself in humans. Results vary, and no specific outcome is guaranteed.


Related human study: A modified, drug-company version of MOTS-c (called CB4211) was tested in a small clinical trial. It caused no serious side effects. The most common problem was injection site reactions, including lumps under the skin that sometimes lasted weeks. It modestly lowered blood sugar and liver enzymes over 4 weeks. Because CB4211 is a different molecule, these results may not apply to compounded MOTS-c.


Regulatory status (as of October 2026): In May 2026, FDA staff recommended that MOTS-c not be added to the list of ingredients pharmacies may use in compounding. On July 23, 2026, FDA's advisory committee voted 7 to 5 (2 abstaining) to recommend adding it. That vote is not binding, and FDA has not issued a final decision. Availability may change based on that decision and the laws in your state.


Athletes: MOTS-c is banned in sport by the World Anti-Doping Agency (WADA), and drug tests can detect it. If you are tested for drugs in competition, do not use this medication.


Note: This summary does not contain all possible safety information. It is not a substitute for advice from your healthcare provider. Always talk to your doctor or pharmacist before using this medication.

How to Use MOTS-c Injection

  1. Prepare: Wash your hands. Check the vial label and beyond-use date (BUD). Do not use if the liquid is cloudy, discolored, or has particles. Wipe the vial top with a fresh alcohol swab.
  2. Draw the dose: Use a new, sterile needle and syringe every time. Draw only the dose shown on your prescription label. Never share needles, syringes, or vials.
  3. Where to inject: Inject under the skin into fatty tissue, such as the abdomen, thigh, or back of the upper arm. Clean the site with an alcohol swab and let it dry.
  4. Rotate sites: Use a different spot each time. Do not inject into a lump, bruise, or sore spot from an earlier dose.
  5. Dispose safely: Place used needles and syringes in an FDA-cleared sharps container right away. Never throw loose needles in the trash.

Important Usage Notes



Who Should NOT Use MOTS-c

Do not use MOTS-c if you:

  • Are pregnant, planning to become pregnant, or breastfeeding. No reproductive safety studies exist.
  • Have a known allergy or sensitivity to MOTS-c or any ingredient in the prescribed formulation
  • Are under 18 years of age
  • Are an athlete subject to drug testing (MOTS-c is banned by WADA)

Important Warnings

No Human Safety Data

  • FDA found no human studies, case reports, or adverse event reports for MOTS-c by any route. Its side effects in people are unknown.
  • No animal toxicity, cancer, genetic damage, or reproductive safety studies have been found.
  • FDA notes that the exact target of MOTS-c in the body is unknown, so it is hard to predict which organs it may affect.
  • Because so little is known, report any new or unusual symptom to your provider.

Blood Sugar Effects

  • MOTS-c lowered blood sugar in animals, and a related compound lowered it in people.
  • If you have diabetes or take blood sugar medicine, your risk of low blood sugar (hypoglycemia) may be higher. Check your blood sugar as your provider directs.
  • Signs of low blood sugar include shakiness, sweating, fast heartbeat, hunger, dizziness, confusion, and irritability.

Immune Reactions

  • FDA warns that injected peptides may trigger the immune system, and injections under the skin carry a higher risk than injections into a vein. Impurities or clumped peptide particles may raise this risk.
  • Because MOTS-c is also made by your body, an immune reaction could, in theory, affect your own natural MOTS-c.
  • Stop using and get medical help right away for hives, facial or throat swelling, wheezing, or trouble breathing.

Injection Site Lumps

  • In the related CB4211 trial, some people developed firm bumps at the injection site that lasted for weeks.
  • Tell your provider about any lump that grows, becomes painful, or does not go away.

Infection Risk

  • Any injection can cause infection. Watch for spreading redness, warmth, pus, blistering, or fever.

Product Quality

  • FDA found MOTS-c ingredients are not well standardized, and quality testing for impurities and bacterial toxins is often missing. Use only product dispensed by a licensed pharmacy under your prescription.
  • Never use “research use only” MOTS-c, IV “cocktails,” or combination products bought online.

Other Precautions

Talk to your doctor before using MOTS-c if you:

  • Have diabetes, prediabetes, or a history of low blood sugar
  • Have cancer or a history of cancer (long-term cancer risk has not been studied)
  • Have liver or kidney disease
  • Have an autoimmune condition or a history of allergic reactions to medications
  • Take any other peptides or are using a combination peptide product

Alcohol and Cannabis

Drug Interactions

Drug interactions with MOTS-c have not been studied in humans. The concerns below are based on animal findings and how MOTS-c is thought to work. Tell your doctor about all medications you take, especially:



Always tell all your doctors and pharmacists that you are using MOTS-c (subcutaneous injection), especially before starting any new medications or having surgery.

Possible Side Effects

Side effects of MOTS-c in humans have not been studied. Based on the related CB4211 trial and other injected peptides, you may notice:

  • Injection site reactions: redness, swelling, tenderness, itching, or a firm lump where you inject. These are usually mild, but lumps may last for weeks. Rotate sites to reduce irritation.
  • Lower blood sugar: shakiness, sweating, or hunger, especially if you have diabetes.
  • Headache, tiredness, or mild nausea, especially when starting.

If any side effects become concerning, contact your doctor or call the number on your prescription label to speak with a pharmacist.

When to Seek Emergency Medical Help

STOP using MOTS-c and get immediate medical attention if you experience:

  • Shortness of breath, wheezing, chest tightness, or swelling of the face, lips, tongue, or throat
  • Widespread hives, severe itching, or skin rash
  • Signs of severe low blood sugar: confusion, slurred speech, seizures, or passing out
  • Fever of 100.4°F (38°C) or higher
  • Blistering, spreading redness, warmth, or pus at an injection site
  • Chest pain, fainting, or a racing or irregular heartbeat

If you feel symptoms of low blood sugar and can safely swallow, take fast-acting sugar (such as juice or glucose tablets) right away, then contact your provider.

Reporting Side Effects

If you experience any serious or unexpected side effects, report them to:

  • Pharmacy / Compounding Hub: 248-633-2880
  • FDA: 1-800-FDA-1088
  • FDA Online: www.fda.gov/medwatch
Important Safety MOTS-c | Rugiet