IGF-1 test timing — when to draw

Morning fasted, 8-12 hours after last dose. IGF-1 doesn't spike with each pulse — it integrates over days — so draw timing within a day matters less than people think, but consistency between draws matters a lot.

Agree. Keep your draw conditions identical every time — same lab, same time of day, same fasted state, same days post-dose. Trend is the data, not any single number.

So: Tuesday 8am, fasted, after Monday pre-bed dose + Tuesday AM dose skipped. Repeat conditions next draw. Got it.

nah tbh the "consistency matters more than timing" thing is kinda half true. yeah IGF-1 has a longer half life and integrates over time, but if you're drawing 2 hours post-dose vs 12 hours post-dose you're gonna see different numbers. the integration argument works if you're talking about drawing in the morning vs afternoon on the same day, but it breaks down if you're inconsistent about proximity to your last injection. I'd say fasted, same time of day is the move, but acting like 8 hours vs 12 hours post-dose doesn't matter is cope. you want to catch it when it's plateaued out, not on the way up.