Taking the question as asked, rather than the general version of it. HbA1c reflects roughly three months of average glycaemia weighted toward the most recent weeks, which is why repeating it at six weeks tells you very little. The improvement on this class comes from two directions — direct glucose-dependent insulin secretion and glucagon suppression, plus the indirect effect of weight loss on insulin sensitivity — and the second continues after the first has plateaued.

JessicaH_TX said:

HbA1c reflects roughly three months of average glycaemia weighted toward the most recent weeks, which is why repeating it at six weeks tells you very…

Agreed, with the caveat that HbA1c is unreliable in anaemia, haemoglobinopathies and recent blood loss, all of which are commoner than people assume. If it disagrees with fasting glucose or a CGM, that is worth chasing.

FDA_TrackerJim said:

Living somewhere the domestic route does not exist, which makes most of the advice on this board inapplicable to me.

This matches mine closely enough to be worth saying so out loud. Posting only so the count is not one.

Adding the clinical framing, because it changes how the question reads.

My experience ordering cross-border ordering internationally: I've ordered from a UK pharmacy. Customs can be hit or miss.

Shipping time: 7-14 days
Customs clearance: smooth, no issues
Quality: Janoshik tested at 98.3% purity

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