Yeh, you can tell if your gear is legit but it won't tell you if it is dosed correctly or not. If you go get bloods done and your FSH and LH are near zero with your test levels through the roof you know its legit. Whether or not its underdosed or not, only a lab would be able to tell you
no which is why some UG labs out there put EQ instead of primo in a bottle. or put dbol instead of var into a pill. its called cheating people and it happens all the time