china if in doubt check this out.

For those of you who have not done your homework.

This is the genuine SI YI BIOTECH website.

http://en.siyi.cc/newEbiz1/EbizPortalFG/portal/html/index.html

If you dont think China is going to be big, check out this website and make your own decisions.

Make sure you click on the English tab in the top right hand corner.

Heres a extract.

Introduction to Siyi Biotech¡¯s product
Ai Rui Te 4-in-1 Saliva Drug Screen Device
It is a disposable in-vitro drug of abuse qualitative detection device. The technology is colloidal gold immunoassay. When human saliva sample enters the membrane of the device the device shows if drug of abuse exists in the sample in a short time

4-in-1
The Product can detect 4 categories of drugs of abuse in 1 load of sample. The 4 categories refer to Methamphetamine, Cocaine, Morphine, and Marijuana.¡£

Colloidal Gold
Colloidal gold is a suspension of gold in water, which shows the character of colloid. The particle size in the colloid is 1 ¨C 100 nm, and absorbent wavelength is 520 nm.

Saliva
Saliva is the colorless liquid secreted from saliva glands. The secretion of saliva is a parasympathical response to physiological, chemical and mental stimulations.
Almost all the substances in the body exist in saliva. Like the blood, saliva contains bacteria, virus, antibodies, drugs, growth factors, and various proteins.