I'm 90% sure that a FBS(fasting glucose) is drawn into a SST(serum seperator tube) A.k.a. "tiger top".
FBS stands for Fasting Blood Sugar level and is drawn to Flox ( grey top) tube. It can also be collected into SST tube.
Blue
red top
lavender top tube
Red
gray
FBS stands for Fasting Blood Sugar level and is drawn to Flox ( grey top) tube. It can also be collected into SST tube.
a lavender top tube
Blue
no preparation required. tie the tourniquet on upper arm, and using the aseptic technique collect blood in grey top tube.
gray
red top
lavender top tube
Red
Sst tube ( tiger top) some facilities call it a gold top
gray
yes