diff --git a/xDripG5/Glucose.swift b/xDripG5/Glucose.swift
index 54f1b892..42fa33e2 100644
--- a/xDripG5/Glucose.swift
+++ b/xDripG5/Glucose.swift
@@ -58,7 +58,7 @@ public struct Glucose {
     }
 
     public var glucose: HKQuantity? {
-        guard state.hasReliableGlucose else {
+        guard state.hasReliableGlucose && glucoseMessage.glucose >= 40 else {
             return nil
         }