The timing problem in TRT labs is underdiscussed relative to the absolute-value arguments. Someone on weekly cypionate can look like they’re at 1400 or 750 depending purely on draw day, which makes most “here are my labs” posts nearly unreadable without knowing draw timing relative to injection. Resources that actually address this: ExcelMale forums - the “when to draw labs” threads are the most practically useful thing online for this specific question. The discussions around E2 peaking before T on short esters are worth reading carefully, especially if you’re using E2 to guide AI decisions. Morgentaler’s clinical writing on symptomatic thresholds vs. absolute values. His argument that trough labs correlate better with quality of life than peak labs is relevant if you’re trying to connect the number to how you actually feel, not just whether your dose is “in range.” On pellet-to-injection transitions: the comparison problem here is underrated. Pellets give you near-steady-state levels. Someone who felt best at 1100-1300 on pellets isn’t targeting 1100-1300 on injections - they’re targeting a trough that approximates pellet steady-state, which is a different number entirely. The E2 piece specifically: peak E2 on cypionate/enanthate is roughly 24-48hrs post-injection. Drawing at trough gives a different T:E2 ratio than drawing at peak. That matters if you’re using ratio rather than absolute E2 to guide dosing decisions - which is the whole argument I posted about last week.