Question 1

What is biological half-life?

Accepted Answer

Biological half-life refers to the time it takes for the concentration of a substance (like a peptide) in the body to reduce by half. For example, if a peptide has a half-life of 24 hours, 50% of the initial dose will remain active after one day.

Question 2

What is the half-life of semaglutide?

Accepted Answer

Semaglutide has a half-life of approximately 7 days (168 hours). This is why it is typically dosed once per week. After 4–5 weeks of weekly dosing, plasma levels approach steady state.

Question 3

How long does BPC-157 stay in your system?

Accepted Answer

BPC-157 has a short biological half-life of approximately 4–6 hours. It is largely eliminated within 24 hours. Twice-daily dosing is commonly used for more sustained plasma levels.

Question 4

What is the half-life of Ipamorelin?

Accepted Answer

Ipamorelin has a half-life of approximately 2 hours. It is typically dosed 1–3 times per day to stimulate GH pulses. PeptideGraph’s Half-Life Tracker can visualize these short decay curves over any timeframe.

Question 5

What is the half-life of CJC-1295 with DAC?

Accepted Answer

CJC-1295 with Drug Affinity Complex (DAC) has a half-life of approximately 7–8 days (168–192 hours), enabling once-weekly dosing for sustained GH elevation.

Question 6

What is the half-life of Testosterone Cypionate?

Accepted Answer

Testosterone Cypionate has a half-life of approximately 8 days (192 hours). PeptideGraph’s Half-Life Tracker can model TRT dosing schedules to visualize trough and peak serum levels.

Question 7

Why track multiple peptides?

Accepted Answer

Many research protocols involve the simultaneous use of multiple peptides. Tracking multiple peptides allows you to overlay decay curves on a single interactive chart, providing a comprehensive view of how different compounds interact pharmacokinetically.

Question 8

How do I use the Peptide Half-Life Tracker?

Accepted Answer

Input the dose, half-life, and dosing frequency of your peptides. The tracker will model plasma concentration curves, helping you understand peak serum levels, trough levels, and the time required to reach a steady state.

Question 9

What does steady-state mean for peptides?

Accepted Answer

Steady-state is reached when the rate of peptide intake equals the rate of elimination, resulting in a consistent plasma level. For most compounds it takes approximately 4–5 half-lives. For semaglutide with a 7-day half-life, steady state is reached after about 4–5 weeks of weekly dosing.