each test kept in its lane
CJC-1295 copies a hormone message and raises growth hormone.
This page takes the tests one at a time. You’ll see what changed in people, rats, mice, and cells in a dish.
The peptide tells the growth gland to release hormone
CJC-1295 copies a body hormone message and has four changed spots, so this lab-made chain lasts longer before the body cuts it apart in the blood. This page follows what happened in each study.
Scientists built it from a short part of the body's own hormone. That natural part breaks down within minutes.
They changed four parts of the chain. The change at spot 2 keeps a cutting enzyme from breaking the chain [2].
An enzyme is a protein that speeds up work inside the body. The other changes also help the peptide last longer.
When the peptide reaches the growth gland, the gland releases growth hormone. The hormone still comes out in waves [2].
Your body normally releases growth hormone in waves. It doesn't send one steady stream all day.
The blood-protein hook kept the peptide in rats longer
Researchers made several copies of a short body hormone. CJC-1295 was the copy designed to hold albumin, a blood protein.
In a two-hour rat test, the hooked form caused a 4-fold larger total amount of growth hormone [2]. That means about four times as much as the form without the hook.
Researchers still found the hooked form in rat blood after 72 hours. In a dish, it also resisted the enzyme that cuts the natural hormone apart.
These were rat and dish findings, not results in people. They help explain why the long form can remain for days.
Small human tests found higher blood hormone levels after CJC-1295
The human work was small. Healthy adults got one shot under the skin.
One test used 30 or 60 micrograms for each kilogram of body weight, which meant a heavier adult received more of the drug than a lighter adult in that same test. A microgram is a millionth of a gram.
Growth hormone rose from 2- to 10-fold, or from twice to ten times its start. That rise lasted at least six days.
In that test, insulin-like growth factor 1 rose 1.5- to 3-fold. After repeated shots, insulin-like growth factor 1 stayed higher for up to 28 days.
CJC-1295 remained in blood for about 5.8–8.1 days [1]. Another test used 60 or 90 micrograms for each kilogram of body weight.
Growth hormone rose about 7.5-fold, or seven and a half times its start. After 1 week, the average was about 46% higher.
Insulin-like growth factor 1 was about 45% higher; normal growth hormone waves remained [3]. A third test checked 11 healthy men.
A fat-carrying protein and a thyroid-related form fell. Albumin pieces and immune proteins rose with insulin-like growth factor 1 [5].
Those protein changes may confirm that the hormone steps are active. They don't show that the men felt better.
ConjuChem was the company running a Phase 2 test in people with HIV and deep belly fat. The test stopped after a death, though records don't show the drug caused it.
No large test proved a health benefit or long-term safety [1]. The two hormone steps explain where the proof ends.
A daily shot restored growth in special mice
One mouse study asked a narrow question. The mice lacked the body hormone needed for normal growth.
Each mouse got 2 micrograms of CJC-1295, or two millionths of a gram. A shot every 24 hours brought weight and length back to normal [4].
Shots given every 48 or 72 hours worked less well. The daily shots worked best in these unusual mice.
The mice also made more growth hormone inside the growth gland. This was a mouse test, not a dose guide for people.
CJC-1295 and ipamorelin, another lab drug, act differently
Ipamorelin is a lab-made drug that also tells the growth gland to release hormone. It reaches the gland by a different route inside the body.
The cited test paired one drug like CJC-1295 with one drug like ipamorelin [10]. It did not test the exact CJC-1295-plus-ipamorelin pair.
Growth hormone rose more with both drug types than with either type alone. The test only checked the quick hormone rise.
No CJC-1295 human trial proved a change in fat, muscle, aging, or daily life. The growth hormone and insulin-like growth factor 1 steps explain why people discuss the pair.
CJC-1295 stays longer than sermorelin or tesamorelin
Sermorelin copies a short part of the body's own hormone message. It leaves blood quickly and was once used to test children with growth problems.
Tesamorelin lasts longer and has an approved use for some people with HIV. In a fair test, they took 2 milligrams, or two thousandths of a gram, under the skin each day.
Those people lost some deep belly fat and liver fat compared with a placebo, a look-alike shot with no drug [6]. That result belongs to tesamorelin, not this peptide.
CJC-1295 uses a blood-protein hook and lasts much longer. CJC-1295 has no approved use anywhere.
In 2024/2025, a review compared CJC-1295, sermorelin, and tesamorelin [11]. Only short, early human tests exist for the long-form drug.
Growth hormone still rose and fell in waves
An older human test compared short, spaced doses with a steady flow. The spaced doses produced clearer growth hormone waves [10].
A later CJC-1295 test found the same rise-and-fall rhythm [3]. The lowest readings rose, but growth hormone did not stay at one flat level.
Your growth gland still released hormone in bursts. That is a blood-test finding, not proof of a health gain.
No trial showed that this rhythm made people feel or function better. We simply don't have that answer.
Sports rules ban the drug at all times
A sports lab found CJC-1295 in an unknown drug product [8]. That finding means drug tests can spot the compound.
Sport rules ban CJC-1295 at all times under Section S2, the group for peptide hormones. The NCAA also bans the drug.
If you're tested for sport, using it can cost your right to compete. That ban says nothing about whether the drug works.