What week for blood test to see if Test is legit

What week is it okay to check my Test levels to see if my gear is working? I'm pinning 600mgs a week for 12 weeks. I just started my second week.

You'll know now if you got pre-cycle blood work. If not, you'd be somewhere around ~ 3000ng/dl mid-cycle.

Im going to do a tren cycle with test e, but the test at trt dose levels. Would it be possible to tell if the test e is legit at such a low dose? Id need to know by week 4 when I start the tren. Im afraid of starting tren and the test is bunk or underdosed.

the only way I can see you finding if it's legit or not would be to run the tren from the beginning, as it will shut you down. if your test e is bunk, your test levels will tank.
I understand that's not what you're wanting to do....but running a TRT dose merely replaces natural testosterone production and brings total T levels to around what is "normal"

I personally would suggest getting test prop and pinning 200mg, then get bloodwork two days later. it's good to go if your test levels are above range. At that point, you could feel comfortable starting the tren.

IMO, the best route is to find a source and lab you trust...as to not have to worry about these issues.