Manual LactoFAN
2
23 of 30
H
2
breath test protocols with LactoFAN
2
Substance, Test Type
Dosage
Interval Length
Criterion
Diagnosis
[ g / kg ] maximum [ g ]
[ min ]
[ min ]
Lactose
Malabsorption
1
25
30
180
HOB
≥
20
ppm H
2
malabsorption
Fructose
Malabsorption
1
25
30
180
HOB
≥
15
ppm H
2
malabsorption
Sorbitol
Malabsorption
0.5
12.5
30
180
HOB
≥
15
ppm H
2
malabsorption
Glucose
Bacterial Overgrowth
1
50
20
120
HOB
≥
15
ppm H
2
overgrowth
Lactulose Bacterial Overgrowth
0.5
10
20
120
HOB
≥
20
ppm H
2
overgrowth
Lactulose Intestinal Transit Time
0.5
10
10
300
Rise (min. 20
ppm
) later than
90 min
delayed
Sucrose
Malabsorption
2
50
30
180
HOB ≥ 15 ppm H2
malabsorption
D-Xylose Malabsorption
2
25
30
180
HOB ≥ 15 ppm H2
malabsorption
Starch
Malabsorption
2
100
30
420
HOB ≥ 20 ppm H2
malabsorption
HOB = Hydrogen Over Basal value [ppm]
