# HbA1c: do the latest BG samples count for more? **URL:** \ **Category:** Treatment\ **Tags:** a1c\ **Created:** [October 16, 2018, 11:08pm UTC](https://forum.fudiabetes.org/t/hba1c-do-the-latest-bg-samples-count-for-more/5237 "2018-10-16T23:08:23Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![Eric](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/eric/32/9209_2.png) [@Eric](https://forum.fudiabetes.org/u/Eric)\ **Post date:** [October 16, 2018, 5:17am UTC](https://forum.fudiabetes.org/t/hba1c-do-the-latest-bg-samples-count-for-more/5237/5 "2018-10-16T05:17:27Z")
> [@How Glycemic Variability impacts HbA1c](https://forum.fudiabetes.org/t/how-glycemic-variability-impacts-hba1c/5223/14): > > I would be surprised to find a study stating this conclusion: Michel, you are correct. The most recent BG has a greater impact on A1C. Indeed, dead RBC’s have no affect on the A1C reading, as they are removed from the body. And certainly a greater number of RBC’s from 2 months ago will be dead than the newer RBC’s. This link clarifies it: > **[The A1C Test & Diabetes - NIDDK](https://www.niddk.nih.gov/health-information/diagnostic-tests/a1c-test?dkrd=%2Fhealth-information%2Fdiabetes%2Foverview%2Ftests-diagnosis%2Fa1c-test)** > > Learn what the A1C test is, how it works and is used to diagnose and monitor type 2 diabetes and prediabetes, when it doesn’t work, and how A1C relates to eAG. > **Will the A1C test show short-term changes in blood glucose levels?** > > Large changes in your blood glucose levels over the past month will show up in your A1C test result, but the A1C test doesn’t show sudden, temporary increases or decreases in blood glucose levels. **Even though A1C results represent a long-term average, blood glucose levels within the past 30 days have a greater effect on the A1C reading than those in previous months.** --- _[View the full topic](https://forum.fudiabetes.org/t/hba1c-do-the-latest-bg-samples-count-for-more/5237)._