Last updated 2026-07-26
TL;DR
Cited protocols use 5-10mg/day (often 10mg) injected subcutaneously for 10 to 20 consecutive days, typically 1-2 cycles per year. This comes from small Russian trials in older adults, not dose-ranging studies. No regulatory body has approved a human dose, so every number below is a research-derived estimate, not a clinical standard.
What is the standard epitalon dosage in the research literature?
The dosage figures you see repeated across forums and vendor sites trace back to a handful of studies out of the St. Petersburg Institute of Bioregulation and Gerontology, led by Vladimir Khavinson. The most cited protocol used 10mg of Epitalon (also spelled Epithalon) injected daily for 10 to 20 days [1]. Some of the earlier pineal peptide work by the same group used doses in the 1-10mg range tested in elderly patients over multi-week courses [2]. There is no dose-ranging trial in humans that tested, say, 2mg versus 5mg versus 10mg head to head and reported which worked best. The 10mg figure isn't a pharmacologically optimized number, it's the dose the Russian group happened to use in the trials that got published and later cited in review papers. That distinction matters a lot if you're trying to reason about dosing scientifically rather than just copying what a peptide vendor's dosing chart says. Epitalon and epithalon are the same compound (Ala-Glu-Asp-Gly, a synthetic tetrapeptide). The spelling split happened because Khavinson's original Russian publications transliterate as "Epithalon," while later Western commercial and research use often drops the "h." You'll see both epitalon dosage and epithalon dosage used interchangeably in vendor literature and on forums; they refer to the identical molecule.
How much epitalon do people actually inject per day?
| Melatonin/pineal function (Khavinson group) | 10mg | 10-20 days | Elderly patients, small cohort | |
|---|---|---|---|---|
| Retinal degeneration studies | 1mg (intramuscular, animal) | Course-based, weeks | Rats, not humans | |
| General "bioregulator" aging trials | 5-10mg | 10-day courses, repeated | Older adult subgroups, non-randomized in several reports | Notice that a chunk of the dose data underlying the higher-end numbers comes from animal work, not humans [4]. When you see "epithalon 10mg" marketed as the standard human dose, that number is real in the sense that it was used in a published human protocol, but the trial designs behind it are small, mostly unblinded, and run by essentially one research group over several decades. That's a thin evidence base to be confident about optimal dosing. |
Across the studies and the secondary literature summarizing them, daily doses cluster into two bands: a lower range of 1-5mg/day used in some of the geriatric and retinal studies, and a higher 10mg/day dose used in the aging-marker and hormonal studies that get quoted most often for the "telomerase activation" claim [1][3]. Here's a rough table of what's been reported, pulled directly from the published protocols rather than from resale sites: | Study focus | Daily dose | Duration | Population |
What does a typical epitalon protocol and cycle length look like?
The protocol structure people reference almost universally follows the Khavinson template: 10 to 20 consecutive days of daily dosing, then a break, repeated once or twice a year [1][2]. Some later summaries extend the "on" period to a full month, but the core published data supports 10-20 days as the tested window, not 30. A common cycle described in secondary sources runs like this: 10mg/day subcutaneous injection for 10 days, then stop for the rest of the season, repeated at most twice yearly (commonly framed as a spring and autumn course). There's no human trial testing continuous daily dosing for months, and no trial testing more than a couple of short courses per year. If you see a protocol recommending daily use for 60+ days straight, that's not something derived from the source studies, it's an extrapolation. The theoretical rationale offered for short cyclical courses (rather than continuous dosing) is that Epitalon is being tested as a signaling peptide meant to nudge pineal gland function and melatonin rhythms periodically, not maintain a constant blood level [1]. Whether that rationale holds up outside the original research group's framework hasn't been independently tested.
Is there a different epitalon dosage for bodybuilding or performance use?
No dedicated bodybuilding dosing protocol exists in the peer-reviewed literature. The interest from that community stems from downstream claims about growth hormone modulation and recovery, not from any bodybuilding-specific trial. Epitalon dosage for bodybuilding, as discussed in forums and by peptide vendors, is almost always just the same 5-10mg/day, 10-20 day protocol borrowed from the geriatric aging studies, sometimes paired with other peptides like BPC-157 or growth hormone secretagogues. There's no published trial measuring lean mass, strength, or recovery time changes from Epitalon in trained adults, healthy or otherwise. Any claim about performance dosing is speculation layered on top of aging research that wasn't designed to answer that question. If you're using it for that purpose, be honest with yourself that you're running an uncontrolled personal experiment, not following an established protocol.
How is epitalon dosed: injection, dose per vial, and reconstitution?
Epitalon is typically sold as a lyophilized (freeze-dried) powder in vials labeled by total peptide content, commonly 10mg or 50mg per vial. The "epithalon 10mg" and "epithalon 50mg" vial sizes you see for sale are packaging denominations, not dosing instructions; you still have to reconstitute and dose from them. Standard peptide reconstitution practice (the same general approach used for other research peptides, described in NIH lab peptide-handling guidance) is to add bacteriostatic water to the vial and draw out the volume that corresponds to your intended dose [5]. For example, a 10mg vial reconstituted with 1mL of water gives a concentration of 10mg/mL, so a 0.5mL draw delivers roughly 5mg. A 50mg vial reconstituted with 2mL gives 25mg/mL, meaning small draws deliver large doses fast, so 50mg vials require more careful, diluted reconstitution if you're targeting a 5-10mg dose. Most of the published research used subcutaneous injection [1][2]. Oral and nasal spray versions are sold commercially, but there's no published human pharmacokinetic data showing what fraction of an oral or intranasal dose reaches systemic circulation intact, since Epitalon is a peptide and peptides are generally degraded by gut enzymes. If a formulation route has no absorption data behind it, treat any dosing claim for it as unverified regardless of what the label says.
How do you calculate the right epitalon peptide dosage from a vial?
The math is simple but people mess it up constantly, mostly by forgetting to account for both the injection volume and the syringe unit markings. Concentration (mg/mL) equals total peptide in the vial divided by the mL of reconstitution fluid you added. Your injection volume in mL equals your target dose divided by that concentration. Worked example: a 10mg vial with 1mL of bacteriostatic water added gives 10mg/mL. To get a 5mg dose, you'd draw 0.5mL, which on a standard U-100 insulin syringe (marked in units, where 100 units = 1mL) reads as 50 units. Get the reconstitution volume wrong, or use a different water amount than you calculated for, and every dose after that is off. If you want to skip the arithmetic, the epitalon dosage calculator walks through vial strength, water volume, and target dose together.
What's the evidence behind the telomerase and lifespan claims tied to these doses?
This is the part that gets glossed over on most peptide sales pages, and it shouldn't be. The telomerase-activation and lifespan-extension claims for Epitalon come almost entirely from one Russian research group's publications, primarily Khavinson and colleagues, spanning work from the late 1990s through the 2010s [1][3][6]. Some of that work reported increased telomerase activity in human somatic cell cultures after Epitalon exposure in vitro [3], and separate rodent studies reported changes in mean and maximum lifespan in certain mouse strains given the peptide [4][6]. Those are real, published findings, cell culture and rodent lifespan data, and they're worth taking seriously as hypotheses. But they have not been independently replicated by research groups outside that Russian network, and there is no completed randomized controlled trial in humans measuring telomere length, telomerase activity, or lifespan as an outcome. A cell culture finding that a peptide increases telomerase activity in a dish is not the same claim as "this peptide lengthens telomeres in a living person," and a mouse lifespan extension is not evidence of a human lifespan effect; species differences in telomere biology and lifespan regulation are large enough that this gap can't be waved away. If you're a researcher trying to place this compound on an evidence hierarchy: it sits closer to "early-stage, single-group, unreplicated preclinical signal" than to "validated longevity intervention." That's true regardless of dose. No dosing protocol, however carefully calculated, closes an evidence gap that only replication and controlled human trials can close. For more on what's actually been shown versus claimed, see the main epithalon evidence page.
How does epitalon dosage compare across different published sources?
| Original Khavinson trials | 10mg/day | 10-20 days | Small elderly cohorts, limited blinding | |
|---|---|---|---|---|
| Rodent lifespan studies | Varies by body weight, mg/kg dosing | Chronic or repeated courses | Not directly convertible to human mg dose | |
| Peptide vendor dosing charts | 5-10mg/day | 10-30 days | Often extrapolated beyond the original trial duration | |
| Bodybuilding forum protocols | 5-10mg/day, sometimes stacked with other peptides | 10-20 days, repeated 2-4x/year | No trial basis for the stacking or frequency claims | The pattern is clear: the core human dose figure (10mg/day for 10-20 days) is fairly consistent across sources because everyone's citing the same handful of original studies. The variation shows up in duration and cycling frequency, where commercial sources tend to stretch the protocol well past what was actually tested. |
Different secondary sources (review articles, vendor dosing guides, forum protocols) report slightly different numbers, and it's worth seeing them side by side rather than treating any single number as gospel. | Source type | Typical dose cited | Duration cited | Notes |
Is there a maximum safe epitalon dose, or a minimum effective one?
No formal maximum tolerated dose has been established in published human trials, and no dose-response study exists to define a minimum effective dose either. The 10mg figure is simply the dose used in the available trials, not a ceiling or a floor determined by safety or efficacy testing. Because Epitalon isn't FDA-approved for any indication and is sold in the US under research-use frameworks rather than as an approved drug, there's no regulatory dosing label to defer to [7]. That leaves you relying entirely on the historical study doses, which is a real limitation if you're trying to reason about safety margins. For a fuller look at reported adverse effects and what's monitored (or not) in the literature, see epitalon side effects.
Should you cycle epitalon, and how often can you repeat a course?
The published protocols used short courses, 10-20 days, repeated at intervals of months rather than run continuously [1][2]. That's the closest thing to precedent for cycling frequency, and it suggests once or twice yearly courses rather than back-to-back or continuous use. There's no trial testing what happens with more frequent cycling, higher cumulative annual exposure, or long-term repeated courses over multiple years. Anyone recommending a more aggressive cycling schedule than the original studies used is going beyond the data, full stop.
Where does epitalon dosing information actually come from, and how reliable is it?
Nearly every dosing chart circulating online, including the ones on peptide vendor sites, traces back to the same small set of Khavinson group publications from Russia. There's no independent Western clinical trial establishing a separately-verified dose. That single-source dependency is the single most important thing to understand before choosing a number. This doesn't mean the studies are fabricated or worthless, small non-replicated trials are a normal, early stage in a compound's evidence life cycle. It means the dosing confidence you should assign is "this is what one research group used and reported," not "this is a clinically validated dose." If you're sourcing the peptide itself, run it through a route with actual quality oversight; Epitalon Rx reviews sourcing through a provider-reviewed pathway with a named fulfilling pharmacy partner, rather than an unverified peptide reseller, which at least controls for purity and labeling accuracy even though it doesn't change the underlying efficacy evidence. See buy epitalon for how that sourcing question is typically evaluated, and epitalon peptide injections for injection technique specifics.
Frequently asked questions
What is the standard epitalon dosage?
The most cited human protocol, from Russian studies by Khavinson and colleagues, used 10mg injected daily for 10 to 20 consecutive days, repeated once or twice a year. This isn't a dose-optimized figure; it's simply the dose used in the available published trials, which were small and not independently replicated.
Is epithalon dosage the same as epitalon dosage?
Yes. Epitalon and Epithalon refer to the identical synthetic tetrapeptide (Ala-Glu-Asp-Gly). The spelling difference comes from transliteration of the original Russian research; Western sources use both spellings interchangeably, and dosing figures reported under either name come from the same source studies.
How many mg of epitalon should I take per day?
Published protocols use 5-10mg per day, with 10mg being the figure most repeated in the aging-marker studies. There's no dose-ranging trial comparing lower and higher amounts, so this figure reflects what one research group used, not a scientifically optimized daily amount.
How long should an epitalon cycle last?
The original studies ran 10 to 20 consecutive days of daily dosing per course, with courses repeated at most a couple of times per year. Protocols recommending 30+ day continuous courses go beyond what's actually been tested in the published literature.
What's the difference between epithalon 10mg and epithalon 50mg vials?
These are just total peptide content per vial, not daily doses. A 10mg vial and a 50mg vial both need reconstitution with bacteriostatic water before injecting; the 50mg vial holds five times the peptide, so smaller draw volumes deliver proportionally larger doses, requiring careful dilution to hit a 5-10mg target dose.
Is there a specific epitalon dosage for bodybuilding?
No. There's no bodybuilding-specific trial. People using it for that purpose typically borrow the same 5-10mg/day, 10-20 day protocol from the geriatric aging studies. Any performance benefit claimed for that use is speculative and untested in trained populations.
How do you reconstitute and inject an epitalon peptide dose?
Add bacteriostatic water to the lyophilized powder vial to reach your target concentration (mg per mL), then draw the volume matching your intended dose using an insulin syringe marked in units. Most published research used subcutaneous injection; oral and nasal versions lack human absorption data.
Does epitalon dosage affect telomerase activity in humans?
Increased telomerase activity has been reported in human cell cultures exposed to Epitalon in Russian lab studies, and lifespan changes have been reported in rodent studies. Neither finding has been confirmed by an independent human trial measuring telomerase activity or telomere length as an outcome, so no dose can currently be said to reliably raise telomerase activity in living people.
Is there a maximum safe dose of epitalon?
No maximum tolerated dose has been established in any published trial, and Epitalon has no FDA-approved status or dosing label. The 10mg figure used in most protocols is simply what the original studies tested, not a proven safety ceiling.
Can you take epitalon every day continuously?
The published protocols used short 10-20 day courses rather than continuous daily use spanning months. No trial has tested continuous long-term daily dosing, so there's no evidence base supporting that approach over the cyclical courses the original research used.
How many times a year can you run an epitalon protocol?
Based on the original Khavinson group protocols, courses were repeated at most once or twice yearly, often framed as seasonal (spring and autumn) courses. There's no data on more frequent cycling or on cumulative effects of running more courses per year than that.
Where do epitalon dosing recommendations actually come from?
Almost all dosing figures circulating in vendor guides and forums trace back to a small number of publications from one Russian research group (Khavinson and colleagues). There's no independent Western clinical trial that separately established or verified these doses.
Sources
- Khavinson VK et al., peptide bioregulator studies summary, National Institutes of Health PubMed record: 10mg daily dosing over 10-20 day courses used in Russian human aging studies
- PubMed record, pineal peptide preparation and aging biomarkers study: Short-course dosing protocols (10-20 days) used in elderly cohorts
- PubMed record, telomerase activity and Epithalon peptide in human cell culture: Reported increase in telomerase activity in human somatic cell cultures exposed to Epitalon
- PubMed record, Epithalon and rodent lifespan study: Reported lifespan changes in mouse strains given the peptide in animal studies
- National Institutes of Health, peptide handling and reconstitution laboratory guidance: Standard peptide reconstitution practice using bacteriostatic water to set concentration
- PubMed record, Khavinson bioregulating peptides and aging review: Long-term Russian research program spanning multiple decades underlying most cited claims
- U.S. Food and Drug Administration, FDA-regulated products database search guidance: Epitalon has no FDA-approved indication or established regulatory dosing label