73 compounds have a published figure. 152 do not.
How to read this. A half-life is how long it takes for half of a dose to leave your body. After two half-lives about a quarter is left, after four about six percent.
Compounds are grouped by how long they last, so you can find yours without reading a scale.
See what is left after a while
Optional. Turns every row into a percentage.
Minutes
23Gone before the hour is out.
Hours
22Gone by the end of the day.
A day or more
18Still there tomorrow, gone within a week.
A week or more
10Still working next week, sometimes next month.
One hundred fifty-two compounds with nothing to show
More than half the library. Some have a number circulating widely that does not survive checking. Most have nothing at all.
The source exists. The number is not in it.
4Each has a figure quoted confidently across the industry, and the document it is credited to does not contain it.
The 30 minute figure is repeated everywhere and traces to no published human measurement.
Figures from minutes to hours circulate. TB-500 as sold is a short fragment, and the published work is on the full-length protein, so the two are not interchangeable.
The only human infusion study found NAD+ disappeared from the blood so fast and so completely that no half-life could be worked out. The 45 minutes and 2 hours quoted on vendor sites have no source.
The Forzinity label has no half-life in it. Section 12.3 gives time to peak concentration of 0.5 to 1 hour, 92 percent bioavailability, and near-complete recovery in urine by 48 hours, which points to a short half-life without stating one. The 2 to 3 hour figure circulating online does not come from the label.
A number circulates. It does not survive checking.
10Repeated across vendor sites and forums, tracing to no study we could find.
Never studied in humans. The 15 to 30 minutes quoted online is borrowed from AOD-9604, which is a related but different fragment.
The 5 to 8 hour figure is usually credited to a 2019 University of Vienna study. No such study can be found.
The 20 to 30 hours repeated across vendor sites traces to no primary source, and animal clearance data points the other way. LR3 is built to slip past the binding proteins that hold ordinary IGF-1 in circulation, which should make it clear faster rather than slower.
Attaching PEG to a peptide does extend how long it lasts, which is why the days-long figures sound plausible. No study has measured it.
The modified version has not been characterised at all. Even plain semax rests on Russian-language work that reports effects rather than clearance.
Cerebrolysin is a mixture of peptides and amino acids from pig brain rather than one molecule, so a single half-life would not mean much. The 2.5 to 6 hours quoted online traces to no primary source.
A Russian registered product, but no pharmacokinetic study has been published. The 30 minutes quoted online traces to no source.
The modified version has not been characterised at all. Even plain selank rests on Russian-language work that reports effects rather than clearance.
A Russian registered product with no published pharmacokinetics.
A Russian registered product with no published pharmacokinetics.
Measured, but never released
2In company trial programmes where half-life is a recorded endpoint. The figure exists. It has not been published.
A blood half-life is the wrong measurement
22Applied to skin or acting inside the gut, these are not meant to reach the bloodstream.
More than one compound in the vial
9A blend has as many half-lives as it has ingredients.
The Russian bioregulators, all of them
25No half-life has ever been published for any peptide in this class, in a person or an animal.
Nothing published at all
80Searched and confirmed empty.
A half-life is not how long it works
Short does not mean dose more often
Tesamorelin clears in minutes and is injected once a day, because what matters is the pulse it sets off rather than how long it lingers.
The number belongs to a product
Tesamorelin has three approved products and three different figures. Growth hormone has nine. A half-life without a product attached is not really an answer.
Effects can outlast the peptide
Something can be gone from your blood in an hour and still be changing what your cells do the next day. These are two different questions.
Why do other charts have numbers where yours are blank?
Because they did not check. The Forzinity label has no half-life anywhere in it, and the figure widely credited to it is not in the document. The same is true of the 30 minutes for CJC-1295 without DAC.
Can I work out my dosing from this?
No, and it is the main thing people try to do with a chart like this. Half-life tells you how fast something leaves. It does not tell you how long the effect lasts, and for most of these nobody has measured that either.
What do the colors mean?
How solid the number is. Dark green came off an approved drug label. Lighter green came from a study. Amber means it was only ever measured in animals, and the row says which. A hollow circle means nobody measured it.
Why is BPC-157 shown in rats?
Because that is the only place it has been measured. There is no published human half-life for BPC-157, and every human-sounding figure online is an animal number with the species dropped off it.