Understand the study
CJC-1295 With DAC: What Does a Long Half-Life Tell Us?
Understand the hormone measurements before making claims about muscle or recovery.
Why does DAC belong in the name?
The studied CJC-1295 was designed to bind albumin, a protein in blood. This design helps explain why the researchers expected a longer time course. DAC identifies that albumin-binding feature. A material described as “without DAC” cannot inherit the same half-life merely because the first part of the name looks similar.
What did the researchers measure?
Two randomized studies lasted 28 and 49 days in healthy adults. They measured CJC-1295 in the body and changes in growth hormone, or GH, and IGF-I. These blood measurements show a biological response. They are not measurements of stronger muscles, faster injury recovery or longer life. [1]
- 01DAC identity
- 02Blood concentration
- 03GH / IGF-I response
What changes were reported?
After a single study administration, average GH concentrations rose two- to tenfold for at least six days; IGF-I rose 1.5- to threefold for nine to eleven days. Estimated CJC-1295 half-life was 5.8–8.1 days. These ranges summarize study observations rather than a timetable for using catalog material. [1]
Half-life is not “how long it works”
Half-life describes how long a measured amount or concentration takes to fall by half under the relevant model. Imagine a simplified amount falling from 100 units to 50: that is one half-life, not complete disappearance. A compound’s concentration and a downstream hormone response are different measurements and need not share one clock.
What did the companion study add?
A companion publication examined the pattern of GH release during prolonged stimulation. GH can be released in pulses rather than at a constant rate. That is a question about the timing of hormone secretion. It does not turn the original blood results into proof of a physical-performance benefit. [2]
What should a material inquiry say?
Use the full name “CJC-1295 with DAC” and describe the experimental requirement. The product page below helps avoid selecting a differently named form. Ask which identity information and analytical records can be provided. Short volunteer studies cannot supply long-term safety evidence for a separate research batch.
Explore the research topic
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View productImages illustrate the catalog. Related products are further reading, not claims of equal effects or interchangeability.
Original research and reading notes
Study amounts and preparations identify experimental conditions, not recommended use. AI-assisted research explanation; sources checked 11 October 2026. NHD catalog materials are for research, development and manufacturing, not human or veterinary use.