Tesamorelin vs CJC-1295 vs Sermorelin

Tesamorelin, CJC-1295 and sermorelin come up together constantly because they belong to the same peptide family and all three do the same basic job: they signal the pituitary to release growth hormone. The differences are in how long each one acts, how it is engineered, and the research contexts they are best known for. This guide compares the three so you can see where each fits before you buy in Canada.

The common thread: GHRH analogues

All three are growth hormone releasing hormone analogues. GHRH is the body’s natural upstream signal that tells the pituitary gland to make growth hormone. Rather than introducing growth hormone directly, a GHRH analogue works one step earlier, prompting the body’s own production. Because they share this mechanism, the meaningful distinctions between them come down to stability, duration and pairing.

Sermorelin

Sermorelin is the closest of the three to native GHRH. It corresponds to the first 29 amino acids of the hormone, the segment responsible for its activity. It is short-acting, producing a brief pulse-shaped signal that mirrors the body’s own rhythm closely. Of the three, it is the most faithful copy of the natural molecule.

CJC-1295

CJC-1295 is an engineered GHRH analogue built for a more durable signal. The widely studied research form is CJC-1295 without DAC (No DAC), sometimes called Modified GRF 1-29, which clears quickly and produces a clean pulse. Its defining feature in practice is pairing: CJC-1295 is almost always studied alongside a growth hormone releasing peptide such as ipamorelin, because the two act on different receptors and complement each other. That combination is the format most Canadian buyers actually order.

Tesamorelin

Tesamorelin is a stabilised GHRH analogue engineered to resist rapid breakdown. It is best known in the research literature for work on visceral adipose tissue and HIV-associated lipodystrophy, a more specific application than the other two. If sermorelin is the faithful copy and CJC-1295 is the pairing partner, tesamorelin is the one with the most narrowly defined research history.

Side-by-side comparison

Which one fits your research?

If you want the truest analogue of natural GHRH, sermorelin is that molecule. If your interest is the widely used GHRH plus GHRP combination, CJC-1295 paired with ipamorelin is the standard format. If your focus is the specific visceral fat literature, tesamorelin is the compound tied to it. They are complementary reference points rather than direct rivals.

Quality first

Across all three, the checks are the same: identity and purity confirmed by HPLC and mass spectrometry, with a certificate of analysis for the exact lot. That per-lot COA is the most useful document to request before ordering.

Buying in Canada from LYFE Science

Of these three, LYFE Science stocks the widely ordered pairing: CJC-1295 (No DAC) + Ipamorelin, filed under our Signalling Research category. We are a Canadian supplier shipping coast to coast by Canada Post, flat $25 shipping and free over $150, with same-day dispatch on orders paid before noon Eastern and delivery to most of Canada in one to three business days. Packaging is neutral, we take Interac e-Transfer and crypto (BTC, ETH, SOL, USDC, USDT), and every lot ships with a COA. Read up first in our peptide guide or browse everything on the shop page.

Buy CJC-1295 + Ipamorelin in Canada