The CLIA kits specifically designed to measure oxidative stress are some of the most sensitive and easy to use products. The fluorescent glutathione kit allows both reduced and total GSH to be measured in the same sample in one well. It is the most sensitive GSH kit on the market. They allow to measure reduced GSH first followed by the total GSH.
For pharmaceutical companies and universities alike the kits for measuring both acetylcholinesterase and butyrylcholinesterase are popular and allow measurements of activity in a wide range of samples, including CSF samples.
Zoos and researchers working with rodents where getting samples can be a problem appreciate the kits for non-invasive monitoring of stress and reproductive function. The kits for cortisol, corticosterone, progesterone, and PGFM are all designed to allow measurement of these analytes in urine or fecal matter and have been extensively used.