claudia_zurich said:

The useful checklist is about verifiability rather than presentation.

My experience ordering cross-border ordering internationally: I've ordered from an Australian compounder. Customs can be hit or miss.

Shipping time: 5-10 days
Customs clearance: was seized once, reshipped free
Quality: Janoshik tested at 97.6% purity

International ordering adds complexity but can save 60-80% compared to US prices. Research your country's import laws first.

Dr.ObesityLA said:

Right, and one flattering data point from a group buy is not consistency.

Bookmarking. The distinction being drawn above is the one nobody else makes.

claudia_zurich said:

The useful checklist is about verifiability rather than presentation.

I disagree that testing history is decisive. It tells you what a supplier did when they were being watched. Continuity of behaviour under stress — a late shipment, a failed test, a complaint — is more predictive than any run of good results.

One concrete data point for the thread. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.

Moderator note: good thread. Keeping it here rather than moving it, because the question is general enough to be useful.