Histamine elimination ratio (HERO) ELISA
ID-Vit®
Folic acid in whole blood, direct MTP AssayThiol-Status (Sulfhydryl-Status Test), photometric
IDK®
Vitamin C, colorimetricIDK®
Serotonin (Serum, dried blood) ELISAIDK®
Serotonin (Stool) ELISAGABA (Stool) ELISA
GABA (Urine) ELISA
BCAA, colorimetric
IDK®
IDO activity ELISAIDK®
Kynurenine ELISAIDK®
Tryptophan (Stool) ELISAIDK®
Tryptophan (EDTA plasma, serum, dried blood) ELISAIDK®
Kynurenic Acid (KynA) ELISAIDK®
Quinolinic acid (QinA) ELISA