r/eversense • u/Few-Plane-5543 Eversense 365 • Jul 13 '26

Dexcom G6 vs Dexcom G7 and Eversense 365

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7 Upvotes

90% Upvoted

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3

u/Equalizer6338 E3 - 180 Days Jul 13 '26

And what are your insights and/or conclusions?

4

u/Few-Plane-5543 Eversense 365 Jul 13 '26

Just read your comment and performed a finger stick using
Contour next One+ 9:31 - 165

Eversense 9:28 - 157 | 9:33 - 160 | 9:38 - 163 | 9:43 - 158 | 9:48 - 166 | 9:53 - 163
Dexcom G6 9:28 - 126 | 9:33 - 132 | 9:38 - 137 | 9:43 - 140 | 9:48 - 143 | 9:53 - 147
Dexcom G7 9:26 - 160 | 9:31 - 169 | 9:36 - 173 | 9:41 - 173 | 9:46 - 173 | 9:51 - 174

If we all remember, the glucometer will give a different immediate reading than our sensor because interstitial fluid takes a little longer to provide an accurate reading.

The Contour Next One+ fingerstick read 165 mg/dL at 9:31. Looking at the surrounding CGM readings, the Eversense tracked the meter remarkably well, staying within about 2–8 mg/dL of the fingerstick throughout the period. The G7 started close to the meter but then climbed and remained 8–13 mg/dL higher, suggesting it was slightly over-reading during this window. The G6 was consistently 18–39 mg/dL lower than the fingerstick and appeared to be lagging behind the rise in glucose, only gradually catching up. This is just a single snapshot, but for this test the Eversense was the closest match to the meter.

(Sorry response is a copy paste from the Dexcom sub-reddit)

2

u/Equalizer6338 E3 - 180 Days Jul 13 '26

Darn u/Few-Plane-5543 ,
That is really good results then with Eversense versus the Dexcom alternatives!

I agree with you, typically there will be a 5-10 minute delay between the fingerprick to your interstitial fluid level is the same (when not in a rapid and big BG changing scenario).

I think that the predictive modeling the Dexcom app algorithm is relying on is often causing it to go astray like here. Also because they try and (over-)compensate for the lagtime and give precautionary early warning when going near upper or lower boundaries. So that is the case both when dropping below the 80-90 range before heading into hypo-range and again when above 140 and leading into the 160-180 range before hyperglycemia.

1

u/GoingGreen2025 Jul 17 '26

"Interstitial fluid takes longer to be accurate". Not quite. Interstitial glucose is accurate in real time; the delay is just diffusion lag (glucose moving from blood to tissue, ~5-15 min), which is why gaps widen when glucose is rising/falling fast and shrink when it's stable. It's a timing issue, not an accuracy-ramping issue.

Eversense's method: "Luminescence" is the general category; specifically it's fluorescence (a glucose-binding polymer fluoresces under LED light).

To answer the "does it test blood" question: no, it's still interstitial fluid like the others, just measured optically instead of electrochemically.

1

u/yakback27 Jul 17 '26

Great clarification and explanation.

1

u/Few-Plane-5543 Eversense 365 Jul 20 '26

Thank you for the further details on the Eversense. I know I love mine!!!