CJC-1295 with DAC vs IGF-1 LR3

CJC-1295 with DAC

Dosed once weekly at 1 to 2 mg, which is how it is overwhelmingly run in practice: the albumin binding makes the weekly total the meaningful quantity, and splitting it across the week buys nothing. A GHRH (1-29) analogue carrying a Drug Affinity Complex maleimide that binds serum albumin, which is the ONLY reason it differs from the no-DAC version: the terminal half-life runs roughly 6 to 8 days instead of minutes, so a single dose produces a sustained rise in GH and IGF-1 rather than a discrete pulse. Phase 1 human dosing studies used single subcutaneous doses of about 30 to 250 mcg/kg. Development was discontinued and it is NOT approved by any regulator; consumer supply is research-chemical grade. Because exposure is continuous rather than pulsatile, it is the less physiologic of the two CJC-1295 forms and carries more of the water-retention and glucose signal.

IGF-1 LR3

A modified insulin-like growth factor 1: an arginine substitution at position 3 plus a 13-residue N-terminal extension sharply reduce binding to the IGF binding proteins, so more of the peptide stays free and active than native IGF-1 would. It is a growth factor that acts directly on the IGF-1 receptor, NOT a growth hormone secretagogue — it does not ask the pituitary for anything, it bypasses that axis entirely. That distinction is why it sits under "other" rather than with ipamorelin or GHRP-2, and it is also why the risk profile is different: secretagogues are self-limited by pituitary feedback, this is not. Its legitimate life is as a cell-culture supplement and a research reagent; recombinant IGF-1 itself (mecasermin) is an approved medicine for severe primary IGF-1 deficiency, but the LR3 analogue is not approved for anything in humans and has no controlled human dosing trials behind it. Everything below is bodybuilding practice, not clinical evidence, and no reliable human pharmacokinetics exist for this analogue, which is why no half-life is listed. Dosing is genuinely in the tens of micrograms — roughly 20-100 mcg per day, not milligrams — which is why vials are sold at 1 mg rather than the 10 mg typical elsewhere on this site: a single 1 mg vial is many weeks of use. Reconstitute and measure carefully, because a decimal error here is an insulin-shock-scale mistake rather than a wasted dose.