green
Gold
tiger top
tiger top
Each test has a specific color tube.
GGT tests are for liver function, not drugs. So the answer is no. Then again...nothing says the doctor can't also order a THC screen at the same time as the GGT test.
EDTA tube or lavender tube
what color tube to draw HepB titer blood test
tiger
Purple tube.
Gray tube
It depends on the test - each test has a different type of test tube top.
A test tube with a red top is used for hcg testing.
need not