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Peptide questions, answered.
22 answers about specific peptides. 41 guides to the research and regulations on peptides. All clinically reviewed for accuracy.
- FDA-approved
- In clinical trials
- Not FDA-approved
- Cosmetic and topical
- Peptide science
- Can BPC-157 and TB-500 be taken together?
- What are the side effects of BPC-157?
- What benefits of BPC-157 are under study?
- How does oral BPC-157 compare to injectable BPC-157?
- How is BPC-157 dosed?
- What are the side effects of TB-500?
- What benefits of TB-500 are under study?
- How is TB-500 dosed?
- What are the side effects of MOTS-c?
- What benefits of MOTS-c are under study?
- How is MOTS-c dosed?
- What are the side effects of KPV?
- What benefits of KPV are under study?
- What oral forms of KPV exist?
- How is KPV dosed?
- What are the side effects of semax?
- What benefits of semax are under study?
- How is semax dosed?
- What should people know about semax nasal spray?
- What are the side effects of epitalon?
- What benefits of epitalon are under study?
- How is epitalon dosed?
- Are peptides natural?
- How are GLP-1 analogs designed?
- How are peptide fragment ions and pI calculated?
- How are peptides made?
- How are polypeptides formed?
- How do GLP-1 receptor agonists work?
- How do peptides differ from proteins?
- How do polypeptides differ from proteins?
- How do polypeptides work in skincare?
- How is peptide molecular weight calculated?
- What are collagen peptides?
- What are peptide hormones?
- What are peptides?
- What are polypeptide hormones?
- What are the types of peptides?
- What are thymosin peptides?
- What is a nonapeptide?
- What is a polypeptide?
- What is a tetrapeptide?
- What is a tripeptide?
- What is an oligopeptide?
- What is gastric inhibitory polypeptide (GIP)?
- What is GLP-1?
- What is peptide YY (PYY)?
- What is the GLOW peptide blend (KLOW)?
- What is the structure of a polypeptide?
- What changed for peptides and the FDA in 2026?
- How does methylene blue relate to peptides?
- What is AICAR (acadesine)?
- What is orforglipron (Foundayo)?
- What is Sarcotropin?
- What is SLU-PP-332?
- What is tesofensine?
- What is adipotide (FTPP)?
- What is ARA-290 (cibinetide)?
- What is dermorphin?
- What is maritide (MariTide)?
- What is PE-22-28?
- What is pinealon (EDR)?
- What is PTD-DBM?
- What is VK2735?

Not FDA-approved
Brain & sleep
What benefits of epitalon are under study?
Epitalon benefits under study include telomeres, melatonin, lifespan, and oxidative stress. See what cell, animal, and early human research has found.
Quick answer
Researchers are studying epitalon for telomeres, melatonin, lifespan, and oxidative stress. Most findings come from cell and animal research. Epitalon has lengthened telomeres in cultured human cells and raised maximum lifespan in mice by 12.3%. A placebo-controlled study included 40 women with low melatonin. Those given epitalon showed a 1.7-fold rise in a urinary melatonin marker. Epitalon is not FDA-approved and has no established labeled route.
- Published
- November 4, 2026
- Last updated
- November 4, 2026
At a glance
| Class | Pineal tetrapeptide (Ala-Glu-Asp-Gly) |
| Taken | Under the skin |
| In the US | Not FDA-approved; PCAC voted favorably (Jul 2026) for 503A compounding, final FDA rule pending |
| Evidence | Limited research |
Benefits and uses researchers are exploring
Epitalon benefits under study span four areas: telomeres, melatonin, lifespan, and oxidative stress1. Most published findings come from laboratory and animal research, and small human studies2 have measured melatonin and other biomarkers.
Epitalon, also spelled epithalon, is a synthetic peptide of four amino acids: alanine, glutamic acid, aspartic acid, and glycine. Researchers built epitalon from the amino-acid makeup of epithalamin1, a cattle pineal extract. Most of its research centers on aging.
People who use epitalon often describe changes in sleep, energy, and overall well-being. Those experiences drive much of its popularity, and tracking sleep and energy puts each one in context.
Epitalon and telomeres
Epitalon has raised telomerase activity and lengthened telomeres in cultured human cells. Telomeres are protective caps on chromosome ends, and telomerase is the enzyme that extends them.
In human fetal fibroblasts, connective-tissue cells that normally lack telomerase, epitalon switched on the enzyme and lengthened telomeres3.
An independent lab reported dose-dependent telomere lengthening in normal human cells4 through telomerase. In breast cancer cell lines, the lengthening ran through a separate route that bypasses telomerase.
Epitalon's other main line of research starts in the pineal gland, where melatonin is made.
What studies show about epitalon, melatonin, and sleep
Epitalon has raised melatonin measures in old monkeys and in two small human studies2. Melatonin helps regulate the sleep-wake cycle, so researchers have proposed5 that epitalon could affect circadian rhythms.
In rhesus monkeys aged 20 to 27, epitalon raised night melatonin in older animals6. Monkeys aged 6 to 8 showed no change.
A randomized, placebo-controlled study5 included 40 women aged 40 to 50 with low melatonin. Those given epitalon showed a 1.7-fold rise in a urinary melatonin marker7. The authors described this as a return to a normal level for their age.
In the second study, older adults given epitalon injections showed higher nighttime melatonin2. The rise was seen mainly in those whose pineal function was low at the start.
Those melatonin findings tie epitalon to aging, the question behind its lifespan studies.
Epitalon and longevity
Epitalon has lengthened lifespan in fruit flies and maximum lifespan in mice.
- Fruit flies: Canton-S flies of both sexes given epitalon only from egg to larva lived 11% to 16% longer as adults8, regardless of dose.
- Mice: Female Swiss-derived SHR mice given epitalon monthly from three months of age showed a 12.3% rise in maximum lifespan9. Average lifespan did not change.
Researchers have also studied how epitalon affects cell damage.
Epitalon and oxidative stress
Epitalon has lowered markers of oxidative damage in rats10 and mouse egg cells. Oxidative stress means cell damage caused by reactive oxygen molecules.
In rats given epitalon injections, damaged fats and oxidized proteins fell. Antioxidant activity in their serum and brain tissue dropped too. In mouse egg cells aged in a dish, an independent lab found lower reactive oxygen species11 and less cell death.
Human studies of epitalon so far have centered on melatonin.
What has human research found about epitalon benefits?
Human research on epitalon includes small biomarker studies2. An older controlled study tested it in retinitis pigmentosa, an inherited eye disease. Both melatonin studies reported higher melatonin measures after epitalon.
| Research area | Laboratory and animal findings | Human research |
| Telomeres | Telomerase activity and telomere length rose in cultured human cells | No published human studies yet |
| Melatonin and sleep | Night melatonin rose in old monkeys | Melatonin measures rose in 2 small studies; FDA's 2026 review5 found a lack of evidence to support effectiveness for insomnia |
| Longevity | Longer lifespan in flies, longer maximum lifespan in mice | No published human studies yet |
| Oxidative stress | Lower oxidative damage in rats and egg cells | No published human studies yet |
| Safety | Lifelong dosing studied in mice | FDA's 2026 review found no clinical data to support epitalon's safety in humans |
The two melatonin studies give future trials a measured starting point in people.
Getting epitalon in 2026
Superpower will offer epitalon formulated in FDA-registered facilities in the US, backed by third-party lab testing, and distributed from US-licensed pharmacies. Licensed clinicians will decide whether it fits each person's health care. The Superpower peptide waitlist is open now.
Epitalon is not an FDA-approved drug. In October 2026, the Department of Health and Human Services said it does not intend to take enforcement action12 against state-licensed pharmacies compounding epitalon and certain other peptides while the 503A Bulks List, the list of ingredients pharmacies may use in compounding, is finalized. Epitalon is one of six peptides the interim policy covers13; its conditions include ingredients from FDA-registered facilities and a patient-specific prescription. The policy followed a July 2026 FDA advisory committee vote recommending epitalon for the list14, with rulemaking still in progress.