CJC-1295 vs Tesamorelin: Mechanism, Evidence, Cost, and Which One Fits

Every figure is an all-in monthly price covering the medication, physician review, refill management and shipping. There is no separate membership fee, and Pepti is cash-pay and does not bill insurance. Current pricing always lives on each product page; the table is a guide to which product fits which goal. CJC-1295 is not supplied on its own at Pepti: it comes paired with ipamorelin, or inside a blend.

Growth-hormone-releasing hormone (GHRH) is the 44-amino-acid signal the hypothalamus sends to the pituitary to trigger a growth hormone pulse. Its first 29 amino acids are the smallest fragment that keeps full activity; that fragment is sermorelin. Native GHRH and sermorelin are both cut apart within minutes by the enzyme DPP-4.

Both molecules on this page are solutions to that problem. CJC-1295 starts from the 29-amino-acid fragment and changes four positions to resist the enzyme. Tesamorelin keeps the whole 44 and adds a trans-3-hexenoic acid group to one end to protect the cleavage site. Same receptor, same job, different chemistry.

Neither contains growth hormone. Each asks your own pituitary to release what it already makes, in a pulse, with somatostatin and IGF-1 feedback still working, which is the central difference from injected growth hormone; see peptides vs HGH. Most of what growth hormone does in adults it does through IGF-1 made in the liver, which is why IGF-1 is the marker that reflects how the axis is responding, and why the aim is a physiological level rather than the highest attainable.

What it is, and which form

CJC-1295 is the GHRH (1-29) chain with four substitutions that protect it from DPP-IV. A 2005 paper in Endocrinology described the design and identified it as a long-lasting GHRH analogue activating the receptor in rats.

It exists in two forms, and the distinction decides how to read its evidence:

So the published human data belongs to a week-long version, while the compounded version is a short pulse dosed daily. The full account is in CJC-1295 with DAC vs without DAC.

What human data exists for CJC-1295

What does not exist: any randomised controlled trial of either form for sleep, recovery, body composition or any clinical outcome, and any human trial of the no-DAC form on its own. Its human evidence is borrowed from the shared chain.

The real difference is evidence, not strength

People often ask which is "stronger". That is not a meaningful comparison: no study has measured both in the same people, both act at the same receptor, and the compounded doses are lower than the trial doses in tesamorelin's case and untested in CJC-1295's. The useful difference is how much is known. Tesamorelin has randomised human trials with imaging endpoints and an approved product behind the molecule. CJC-1295 has pharmacokinetic studies of a form nobody prescribes, no outcome trials, and an advisory committee that voted against adding it to the bulks list for lack of evidence. Both are prescribed on mechanism plus a physician's judgement; tesamorelin simply has more behind that judgement.

An advisory committee vote is a recommendation, not a decision and not a ban; the recorded reasoning was the absence of evidence for the nominated use rather than a finding of harm. Tesamorelin's position did not move in the 2026 changes that affected many peptides, because it was never on the bulks list. Compounded medications are never FDA approved as finished products. Are peptides FDA approved explains the difference between not approved and not legal.

Anti-doping

WADA's 2026 Prohibited List names both under S2.2.4, growth hormone releasing factors, prohibited at all times, in and out of competition, along with ipamorelin as a secretagogue. A prescription does not create an exemption. See do peptides show up on a drug test and peptides for athletes.

Both are injected under the skin into the abdomen or thigh, rotating sites, at 0.25 mL, which is 25 units on a U-100 insulin syringe, on weekdays with weekends off. Tesamorelin is directed at bedtime, so the induced pulse lands on top of the one deep sleep already produces. The CJC-1295 pairing is directed once daily on an empty stomach, because glucose and fatty acids after a meal blunt the pulse; many prescribers place it at bedtime for the same reason as tesamorelin. You do not need to calculate anything: your directions are printed on the vial, and your physician sets them after reviewing your intake. Never change your own dose.

Twenty doses covers about four weeks, which is why refills run every 28 days, one vial per fill. Both ship refrigerated with ice packs, ready to use, with sterile syringes and alcohol prep pads, and stay in the fridge between doses. Tesamorelin dosage and ipamorelin dosage go through the arithmetic, and how long does a peptide vial last explains every number on a label.

Bloodwork is not required for any Pepti treatment. If your physician wants labs for your care, they'll ask through your account.

Shared, because both raise growth hormone. Fluid retention or puffiness, joint aches and tingling in the hands are the recognised pattern of more growth hormone than a person needs, and they go to your care team rather than being pushed through. Growth hormone reduces insulin sensitivity, so blood glucose can drift up.

Tesamorelin. Better characterised than most compounded peptides, because the approved product's label reports pooled data from 740 treated patients at 2 mg daily, four times the compounded dose: injection-site reactions in 17 per cent against 6 per cent on placebo, joint pain 13 per cent, pain in an arm or leg, muscle aches and peripheral swelling each 6 per cent, tingling 5 per cent, hypersensitivity reactions such as itching, flushing, hives or rash in 4 per cent, and new-onset diabetes in 5 per cent against 1 per cent on placebo. There is no interaction list beyond a label note that growth hormone can alter cytochrome P450 metabolism.

The CJC-1295 pairing. In the 2006 trials, injection-site reactions and headache were the main complaints. What is reported clinically is injection-site redness or soreness, a brief flush after injecting, headache, hunger because ipamorelin acts at the ghrelin receptor, vivid dreams with evening dosing, and the fluid-related effects above. Because CJC-1295 acts for longer than ipamorelin, a dose change shows more slowly, so a prescriber acts on the first report. More in is CJC-1295 / Ipamorelin safe and ipamorelin side effects.

For both, call 911 or get emergency care first for swelling of the face, lips or throat, a widespread rash or any difficulty breathing, then tell your care team.

Tesamorelin has randomised, double-blind, placebo-controlled trials, two of them phase 3, with a measured effect on visceral fat and favourable secondary findings on triglycerides and liver fat. Those trials were mostly in adults with HIV, at two to four times the compounded dose, and the approved label calls the drug weight-neutral. CJC-1295 has pharmacokinetic trials showing the shared GHRH chain raises growth hormone and IGF-1 in healthy adults with pulses preserved, no outcome trials at all, and no human study of the form actually compounded.

Neither has a trial in healthy adults showing better sleep, recovery or general body composition, neither has long-term safety data over years, and no study has compared them with each other. Prescribers describe sleep first, often within the first weeks, and body-composition changes over two to three months where diet and training are in place; response varies widely. Any provider claiming either is proven for sleep, recovery or general fat loss is overstating it.

Neither can be bought legitimately without a prescription. Sites selling them "for research use only" are not accountable for what is in the vial: identity, purity, sterility and concentration are untested. The prescription route:

1. Complete a free online intake covering your history, medications and what you want help with.
2. A physician licensed in your state reviews it, usually within 24 hours.
3. If it is appropriate, a PCAB-accredited, FDA-registered US 503A compounding pharmacy prepares it to that prescription. Lot test results are published at /quality/lab-results.
4. It ships refrigerated with your directions printed on the vial.
5. Your physician stays reachable for questions and side effects.

Pepti prescribes both in every state except Oklahoma, plus DC Step-by-step pages: how to get tesamorelin prescribed online and how to get CJC-1295 / Ipamorelin prescribed online.