Question on Marijuana Tests?

Question

For a research thing, i need to know if marijuana stays in your blood system longer than it does in your urine?

Answer 1

Liam O, are you sure you're talking about marijuana?

I'd always heard it stays in your system closer to 30 days...longer if you have a lot of body fat.  

Yes, it does stay in your blood longer...either that or blood drug testing is more sensitive...

Answer 2

It does by about 12 hrs. Average to clear system is 48 to 72 hrs.