@jakedduck1 Hi Leonard,

I just noticed your post about your cousin's A1C fluctuating a great deal in just 3 1/2 weeks. As @howardm posted, A1C shows blood sugar levels over the past 3 months, therefore it seems highly unlikely that a doctor would test it again in 3 1/2 weeks. Here is an article from Mayo Clinic's website regarding the A1C test,
https://www.mayoclinic.org/tests-procedures/a1c-test/about/pac-20384643.

Here also is a quote from that article that you might find helpful: "The A1C test result reflects your average blood sugar level for the past two to three months. Specifically, the A1C test measures what percentage of your hemoglobin — a protein in red blood cells that carries oxygen — is coated with sugar (glycated). The higher your A1C level, the poorer your blood sugar control and the higher your risk of diabetes complications."

I'm wondering if your cousin had these A1C checks done at a doctor's office or hospital or if it represented some home testing? Also, wondering if your cousin has Type I or Type II diabetes?

These could all be factors in the fluctuating levels.