Tesamorelin vs CJC-1295 as your GHRH half, does it actually matter which you pair with ipamorelin?

Posted by fasted_scientist in GH & Growth Peptides - 2 points, 6 comments.

Been looking at the tesamorelin + ipamorelin combo lately and I keep wondering if tesamorelin is genuinely better than CJC-1295 with DAC or without, or if people are just drawn to it because it has an actual FDA approval behind it (for HIV lipodystrophy, fair enough). The profile here says tesamorelin has a short half-life, around 26 to 38 minutes, which is quite different from CJC-1295 with DAC hanging around for days. That alone changes the pulse shape quite a bit.

I've only run CJC-1295 without DAC paired with ipamorelin myself, seemed decent for sleep and recovery but nothing dramatic. Could just be placebo on the sleep side, hard to say. Never tried tesamorelin so I can't compare firsthand.

The thing I keep pushing back on is the visceral fat claim. Tesamorelin's data on abdominal fat reduction looks solid in its specific population but I see people generalising that to healthy gym folks and I'm not convinced it transfers cleanly. Anyone here actually switched from CJC to tesamorelin and noticed a real difference? Especially on the body comp side. Keen to hear actual experiences rather than just the marketing angles.

Comments

• sleep_coastal: I’ve only run CJC‑1295 (no DAC) with ipamorelin for a few months. Sleep felt a bit deeper and recovery after lifting seemed smoother, but nothing that jumped out as a clear win over baseline, could easily be placebo or just better routine. The short half‑life of tesamorelin means a sharper GH spike versus the flatter, longer tail you get with CJC‑1295 + DAC, so the pulse shape really does differ. I’d be curious to see IGF‑1 levels side‑by‑side; that tells you more about actual GH exposure than
• labrat_vik: Yeah the sharper spike from tesamorelin does feel different – I noticed I fell asleep faster and woke up less groggy when I ran it with ipamorelin for six weeks, but my IGF‑1 came back only a tad higher than with CJC‑1295 no DAC. Visceral fat loss was modest, nothing like the HIV study numbers. Just my own take.
• labrat_vik: The IGF-1 point is the real crux of it, subjective "sleep felt deeper" is hard to separate from just being in a better routine. I ran CJC-1295 without DAC plus ipamorelin for about three months and had the same kinda mild recovery bump, could've been anything. Never got bloods drawn during it though, which bugs me now. Would love to see someone actually compare IGF-1 between the two at equivalent doses.
• fasted_scientist: Cheers for that, yeah the three month run without bloods is exactly the trap I fell into too. Mild recovery bump could've been anything, spot on. The IGF-1 comparison at equivalent doses is what we actually need but I reckon the dosing equivalence itself is tricky given the half-life difference. Tesamorelin's shorter half-life probably needs more frequent dosing to match CJC w/o DAC, so "equivalent" gets fuzzy fast. Anyone seen anyone actually attempt this with proper bloods?
• fasted_scientist: Cheers for that, that's exactly the kind of comparison I was after. The IGF-1 being only a tad higher pretty much lines up with what I'd expect from the half-life difference alone, sharper spike but not necessarily more total GH output over 24 hours. The sleep thing is interesting though, did you pin tesamorelin right before bed or earlier in the day? Wondering if timing mattered for the less groggy mornings.
• fasted_scientist: Ngl I totally agree that IGF‑1 would give a clearer picture than just how we feel – have you ever actually pulled blood for that on either stack? The sharper spike from tesamorelin’s short half‑life should show up there if it’s truly different. Also the visceral fat data stays pretty locked to the HIV lipodystrophy group, so extrapolating to healthy folks feels a stretch. Any studies you’ve seen comparing IGF‑1 changes between the two?

Community discussion - research and educational context only. Not medical advice.