Figure 3
From: Methane breath tests and blood sugar tests in children with suspected carbohydrate malabsorption

Parallel blood sugar testing and hydrogen breath test (HBT) in children with suspected carbohydrate malabsorption. Time course analysis of blood sugar levels in children with suspected fructose (a,b) and lactose (c,d) malabsorption. A positive HBT (H2 positive) was defined by an increase of H2 ≥ 20 ppm at 30/60/90/120 /150/180 min after administering fructose/lactose. Patients with an elevated H2/CH4 baseline value (0 min: H2 > 20 ppm/CH4 ≥ 10 ppm) were excluded. Blood sugar levels were measured before administering the test sugar solution (0 min, “baseline”) and at 15/30/45/60 min. Shown are the total blood sugar values (a,c) or the blood sugar delta values (b,d). Error bars indicate the standard error of the mean.