The Longevity Desk

Reference

Compound reference

Every compound covered here, at a glance. What people actually run, what a published trial actually administered, and the distance between the two.

These are not protocols and there is no dose to follow on this page. The numbers under “what circulates” are reported because they are what people use, not because anything here endorses them. Where a convention has no derivation behind it, the card says so. Each one links to the full entry, which carries the citations.

Recovery

BPC-157

The most sold recovery peptide, and no receptor for it

What circulates

250 to 500 mcg per day

What was studied

About 117 mcg per day

Allometric scaling from the 10 µg/kg rat arm, FDA body surface method

Above the research

The convention sits above every scaled figure and has no published derivation. It is also exactly one twentieth and one tenth of a 5 mg vial.

Receptor
None identified
Human trials
No RCT published
WADA
S0, all times
The plain English version
Recovery

TB-500

Seven amino acids cut from a 43 amino acid peptide

What circulates

2 mg twice weekly, then weekly

What was studied

No human dose has ever been published

FDA found no article administering it to a human

Nothing to compare

There is nothing to compare against. Every mg/kg figure in circulation belongs to thymosin beta-4, which FDA states is not the same substance.

Mass check
889, not 4,963
Toxicology
None, any species
WADA
S2.3, non-Specified
The plain English version
Metabolic

Semaglutide

Approved, and the evidence is not the problem

What circulates

Prescription doses, often from grey market vials

What was studied

Large randomised placebo controlled trials

The strongest evidence base of anything on this site

Worth a closer look

The risk moved off the molecule and into the vial. Three tested vials were far less pure than claimed and simultaneously over label, so careful dosing meant overdosing.

Tested purity
7.7 to 14.37%
Content
28.6 to 38.7% over
Approved
Yes
The plain English version
Metabolic

Tirzepatide

Approved, with a cloned trial record on the registry

What circulates

Microdoses below 2.5 mg weekly

What was studied

5, 10 and 15 mg weekly

SURMOUNT-1, about a fifth of body weight at the top dose

Below the studied range

Microdosing was tested once. At the smallest dose people lost under a kilogram in six months.

Approved
Mounjaro, Zepbound
Registry clone
NCT07481747
Tell
Lilly's own code, plus (b)
The plain English version
Metabolic

Retatrutide

Approved nowhere, and every vial is off supply chain

What circulates

0.25 to 1.5 mg starting, 4 mg maintenance

What was studied

Up to 12 mg weekly

Lilly phase 2, about a quarter of body weight at the top dose

Below the studied range

Trial results describe a molecule, not a vial. No approved version exists at any price, so there is no reference article to hold yours against.

Approved
Nowhere
Registry clone
NCT07467447
Vendor test
121% of label
The plain English version
Growth hormone

Ipamorelin

Two human trials, and nobody has seen the second

What circulates

200 to 900 mcg per day, under the skin

What was studied

About 4.2 mg per day, into a vein

The published Helsinn trial, which missed its endpoint

Below the studied range

Five to twenty one times smaller, and by a route nobody has studied in a person. The smaller number is smaller in a unit no one has converted.

Unreported trial
NCT01280344, 320 people
Toxicology
None, any species
WADA
S2.2.4, non-Specified
The plain English version
Growth hormone

CJC-1295

Two versions sold under one name

What circulates

1 to 2 mg per week, DAC version

What was studied

30 to 60 mcg/kg, about 2.25 to 4.5 mg

Teichman 2006, trials of 28 and 49 days

Below the studied range

A quarter to a half of one studied injection. Lower, not higher, and still a dose no trial administered.

No-DAC evidence
Tier D, none
Combination studies
None, any species
WADA
S2, all times
The plain English version
Growth hormone

MK-677

In a Phase 3 for children and on the grey market at once

What circulates

10 to 25 mg once daily

What was studied

25 mg, the top of three arms

A 1996 dose ranging study in 32 people aged 64 to 81

Worth a closer look

The convention matches a studied dose, but one chosen for being the largest tried in 32 elderly people. Children in the active Phase 3 are dosed per kilogram. Nobody re-derived it for adults.

Longest trial
2 years
Result
+1 kg lean, no strength
Also
Glucose up, insulin worse
The plain English version
Cognitive

Semax

A Russian prescription drug, judged without its own literature

What circulates

500 to 3,000 mcg, usually injected

What was studied

800 to 8,000 mcg, up the nose

The Russian 0.1 percent label

Below the studied range

Below the label range and by a different route. Almost everything sold here is injected; every published study went intranasally.

Mass check
3 molecules, ~1 unit apart
FDA reviewers
Recommended against
Committee
Voted 8 to 5 to add
The plain English version
Growth hormone

Tesamorelin

Approved for one thing, at a dose that is no longer sold

What circulates

2 mg a day, from grey market vials, run in cycles

What was studied

2 mg a day, continuously, for 26 weeks to a year

Falutz 2007 in 412 adults with HIV, plus three later trials at the same dose

Worth a closer look

The number matches the dose in every published trial, and the product it was approved for is gone. What is sold as medicine now is 1.4 mg a day, and 1.28 mg in the version that replaced it, in formulations both labels call not substitutable. Every trial dosed continuously, and no published evaluation of the weeks on, weeks off cycling turned up.

Label says
Weight neutral effect
Fat you can pinch
Unchanged, P = 0.08
Registry forgery
NCT07481734, says mock
The plain English version
Cognitive

Selank

Three Russian trials, and not one reports a dose

What circulates

900 mcg a day from the drops, 1,350 quoted by vendors

What was studied

No trial has ever reported a dose

Three Russian trials, 192 patients, no dose in any of them

Nothing to compare

There is nothing to compare against. None of the three trials reports a dose or a treatment length, so both circulating numbers came from somewhere other than a study: 900 mcg per day is a derivation from assuming 20 drops to a millilitre of the Russian nasal drops, and the 1,350 mcg per day that vendors attribute to the 2008 trial is absent from every primary source.

Human trials
3, all Russian, no placebo
Semax pairing
Never given together
Trials registry
No Selank record at all
The plain English version
Recovery

GHK-Cu

Every human study is a cream. It is sold in a vial.

What circulates

1 to 2 mg a day under the skin, some say 3

What was studied

No injection into a person that I could find

Every published human study applied it to skin, and the 1994 gel's strength is not stated

Nothing to compare

There is nothing to compare against, because I could not find a published study injecting it into a person by any route. The human evidence that does exist is a cream on a wound, and even the 2 percent strength quoted for it on vendor pages is not in the paper. The circulating numbers do match the syringe: at 25 mg/mL, 1 mg is 4 units, 2 mg is 8, 3 mg is 12.

Controlled trials
3 topical, 2 found nothing
Injected in people
None I could find, any route
Copper per 2 mg
About 320 mcg elemental
The plain English version
Mitochondria

MOTS-c

The mouse data is good, the human trial is forged

What circulates

5 to 10 mg per dose, two or three times a week up to daily

What was studied

No human dose has ever been published

Every published dose is a mouse dose, 0.5 to 15 mg per kg per day

Nothing to compare

There is nothing to compare against. Every dose in the record was given to a mouse, into the abdominal cavity, and the one completed human trial used CB4211, a modified version rather than MOTS-c itself. Vendors say they reached the number by scaling the mouse doses by body surface area, and running that conversion on the 15 mg per kg dose does not land at 5 to 10 mg.

Human trials
None with MOTS-c itself
Registry record
NCT07505745, fabricated
WADA
2026 list, banned at all times
The plain English version
Recovery

KPV

A gut treatment for rodents, sold as an injection

What circulates

200 to 400 mcg a day injected, 250 mcg twice daily by mouth

What was studied

No human dose has ever been published

The only figure in the literature is 16 mcg/kg/day in mice, by feeding tube

Nothing to compare

There is nothing to compare against. Scaling that mouse figure the standard way lands near 90 mcg a day for an adult, which puts the oral convention five to ten times above the only number the literature can carry, and that number came from a mouse getting nanoparticles down a feeding tube. The injected convention sits above nothing at all, because nobody has published an injection of KPV in any species.

Injected form
No study, any species
Two forms sold
341.45 or 342.43, unstated
Committee
8 for, 6 against, 1 abstain
The plain English version
Longevity

Epithalon

The human evidence belongs to a cow gland extract

What circulates

10 mg a dose under the skin, 50 or 100 mg a course, one to two times a year

What was studied

0.5 mg a day, sprayed under the tongue

Ivko 2021, 20 women on a 20 day spray, the only randomised study of the four unit chain

Above the research

Twenty times the only dose the four unit chain has been given a person, and by a route no published study was found using. Trace the 10 mg and it lands on the 2003 extract trial, whose St Petersburg arm gave 10 mg into muscle daily for 10 days, 100 mg a course, digit for digit the circulating schedule. The agent in that trial was Epithalamin, a bovine pineal extract that FDA states is a different substance, and no vendor or clinic page was found deriving the 10 mg from any study of the chain itself.

266 person trial
Epithalamin, not the peptide
Telomeres in a person
None found measured
Mouse dose on record
1 mcg or 1 mg, unresolved
The plain English version
Metabolic

NAD+

The molecule in the bag never gets inside a cell

What circulates

250 to 1000 mg a session into a vein, 100 to 500 mg under the skin

What was studied

10 mg a day into a vein, for seven days

Yu 2026, 180 adults with damaged hearts, the only study sized for an outcome

Above the research

The 500 to 1500 mg the wellness industry infuses is fifty to a hundred and fifty times the 10 mg a day of the one adequately sized randomised trial, and above the 100 mg that is the highest registered intravenous human dose those searches found. I found no published human dose-finding or dose-response study of injected NAD+ by any route, and no published human study at all of the under the skin form. That convention traces to a 2014 conference poster with no peer-reviewed publication I could find.

Enters cells intact
No, taken apart outside
Under the skin
No published study I found
Injectable recall
Class I, D-0094-2026
The plain English version
Growth hormone

Sermorelin

Two approvals, neither for an adult, both gone in 2009

What circulates

200 to 300 mcg under the skin nightly, titrated toward 500 mcg

What was studied

2 mg nightly, or 2,000 mcg

Vittone 1997, the only adult treatment study the author could find, 11 men, six weeks, no control group

Below the studied range

The convention sits at about one seventh to one tenth of both figures it could be held against: the pediatric label dose of 30 mcg/kg scales to roughly 2,100 mcg in a 70 kg adult, and the one adult study used a flat 2 mg. Grey market doses normally drift upward. This one drifted down, and there is no approved adult labelling and no adult dose finding study behind it.

Adult treatment studies
One I could find, uncontrolled
Two head to heads
One loss, one draw
WADA
S2.2.4, banned at all times
The plain English version
Hormonal

Melanotan II

Three men for the tan, and a real safety file

What circulates

250 to 500 mcg daily to load, some to 1,000 mcg, then 500 mcg twice weekly or 250 mcg once or twice weekly

What was studied

0.025 mg/kg, about 1.75 mg for a 70 kg adult

Recommended by the 1996 phase I and used in all three later trials. Four trials, 43 men, 1996 to 2000.

Below the studied range

The convention sits below the tested amount rather than above it. The three later trials used 0.025 mg/kg, about 1.75 mg for a 70 kg adult, and the 1996 phase I ran 0.01 to 0.03 mg/kg, roughly 0.7 to 2.1 mg at that weight, so what circulates is between a seventh and a third of what anybody was given. I could not trace it to a derivation: one says the figures are extrapolated from the published research range and then names no publication, and another concedes the loading and maintenance models are community-derived.

Tanning evidence
3 men, 5 injections each
Published harm
Melanoma, priapism, ICU stay
Registry record
NCT07437560, says example
The plain English version
Hormonal

PT-141

Approved, and the label rules out the men buying it

What circulates

1.0 to 2.0 mg under the skin in men, reported as convention

What was studied

1.75 mg under the skin, in premenopausal women

Two phase 3 trials, NCT02333071 and NCT02338960, in 1,267 premenopausal women. The only published male efficacy doses under the skin were 4 mg and 6 mg, in men sildenafil had not helped.

Worth a closer look

The number matches, and unusually for this reference it is traceable. The 1.75 mg was lifted off the Vyleesi label, where it is the approved dose for premenopausal women and the top of a phase 2b trial that compared 0.75, 1.25 and 1.75 mg in 327 of them. That same label's Limitations of Use name men as a group the drug is not indicated for. No male dose-finding study supports the number, I could not find a published trial of any design giving a man the 1.75 mg subcutaneous dose, and against the only published male subcutaneous efficacy doses, 4 mg and 6 mg, the convention runs at roughly a third to a half.

Approved for
Premenopausal women only
Satisfying events
No significant difference
Melanotan II link
Analogue or metabolite, disputed
The plain English version

Everything else on the list

19 of 65 compounds have an entry so far, 0 are being researched now, and 46 are queued. The whole list is here so you can see what is coming rather than guess.

A name on this list is not a recommendation and not a claim that anything works. Rows marked “not yet” have no entry, no verification and nothing behind them yet. They are on the list because people ask about them.

Recovery

Metabolic

  • SemaglutideCovered
  • TirzepatideCovered
  • RetatrutideCovered
  • NAD+Huge mainstream interest, weak injectable evidenceCovered
  • CagrilintideNot yet
  • MazdutideNot yet
  • AOD-9604Not yet
  • 5-Amino-1MQNot yet
  • TesofensineNot yet
  • L-Carnitine, injectableNot yet

Growth hormone

Cognitive

  • SemaxCovered
  • SelankCovered
  • DihexaNot yet
  • P-21Not yet
  • PE-22-28Not yet
  • CerebrolysinNot yet
  • DSIPNot yet

Mitochondria

  • MOTS-cCovered
  • SLU-PP-332Not yet
  • BAM-15Not yet
  • SS-31Not yet
  • HumaninNot yet
  • AICARNot yet

Longevity

  • EpithalonTelomere claims need dismantlingCovered
  • PinealonNot yet
  • FOXO4-DRINot yet
  • Glutathione, injectableNot yet

Immune

  • Thymosin Alpha-1Not yet
  • ThymalinNot yet
  • LL-37Not yet
  • VIPNot yet
  • ARA-290Not yet

Hormonal

  • PT-141Covered
  • Melanotan IICovered
  • Melanotan INot yet
  • OxytocinNot yet
  • Kisspeptin-10Not yet
  • GonadorelinNot yet

SARMs

  • RAD-140Not yet
  • RAD-150Not yet
  • LGD-4033Not yet
  • LGD-3033Not yet
  • MK-2866Not yet
  • YK-11Not yet
  • S4Not yet
  • S23Not yet
  • AC-262Not yet
  • SR-9009Not yet
  • GW-0742Not yet

The SARMs are deliberately last. They are not peptides, they carry documented liver toxicity across the class, and they will be covered as one page about the research rather than eleven separate entries.

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