CJC-1295 No DAC vs DAC: The Difference Explained

If you have looked at CJC-1295, you have run into two versions: No DAC and DAC. They share the same core peptide but behave very differently, and picking the wrong one for your protocol can throw off your results. This guide explains what DAC actually is, how the two forms differ, and how to buy CJC-1295 (No DAC) in Canada.

Same peptide, one key modification

CJC-1295 is a growth hormone releasing hormone (GHRH) analogue. The difference between the two forms comes down to a single addition:

• DAC stands for Drug Affinity Complex, a modification that lets the peptide bind to albumin in the blood. That binding dramatically extends its half-life, so it stays active for a long time.
• No DAC, often called modified GRF (or CJC-1295 without DAC), leaves that complex off. Without it, the peptide has a much shorter half-life and clears quickly.

So the core molecule is the same. DAC is the switch that turns a short-acting peptide into a long-acting one.

How the two forms compare

Why the half-life difference matters

The half-life is the whole story here. The No DAC form produces a short, pulse-like GHRH signal, which is why it is the version researchers usually pair with Ipamorelin: the two short-acting peptides line up well together. The DAC form, by contrast, keeps the GHRH signal elevated over a much longer window, which is a different research question entirely. Neither is better in the abstract; they model different things.

Which one fits your work

• Studying pulsatile signalling, or pairing with Ipamorelin? No DAC is the standard choice.
• Interested in sustained, long-duration activity? DAC is the form built for that.

Why No DAC is the common choice

In practice, the No DAC form is the one you will see most often, largely because it is the natural partner for Ipamorelin in combination research. Its short action profile complements Ipamorelin’s selective ghrelin receptor activity, and the two are frequently supplied together as a blend. If you want to understand that pairing in depth, read our guide to the CJC-1295 and Ipamorelin blend.

Buy CJC-1295 (No DAC) in Canada

At LYFE Science we carry CJC-1295 (No DAC) with Ipamorelin in our signalling research category. Every lot is verified by HPLC and mass spectrometry, with a COA available per lot, so you can confirm identity and purity before you begin.

We are a Canadian supplier and ship Canada-wide by Canada Post: flat $25, free over $150, in neutral packaging. Orders paid before noon Eastern ship the same day, with delivery to most of Canada in one to three business days. Pay by Interac e-Transfer or crypto (BTC, ETH, SOL, USDC, USDT).

Common points of confusion

A few things trip people up with CJC-1295. First, the names: modified GRF, CJC-1295 without DAC, and CJC-1295 No DAC all refer to the same short-acting form, so do not assume different labels mean different compounds. Second, the core sequence is identical between the two versions; the only structural difference is the Drug Affinity Complex, so the two forms are not separate peptides but the same peptide with and without one modification. Third, longer half-life is not automatically an advantage. A short signal is exactly what some protocols call for, which is why the No DAC form remains so widely used. Knowing these three points saves a lot of second-guessing when you are comparing product listings.

The short answer

DAC extends the half-life; No DAC does not. Choose No DAC for short, pulse-like signalling and pairing with Ipamorelin, and DAC for sustained activity. For most combination research, No DAC is the form you want.

Buy CJC-1295 (No DAC) in Canada