At home test control line

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What does the control line test for? Is it the same as an integrity check? Does a solid control line mean that my Creatinine level and SG were adequate?

Do they normally check for both Creatinine and SG? Or do they check for Creatinine first and then check for SG only if the Creatinine level is low? I am a little more confident about my Creatinine levels than my SG because I took some Creatine powder 24-48 hours before the test. But I drank a lot more water than Gatorade and I didnâ??t take any Rolaids or add salt.

The control line helps to check the integrity of the test. If the control line doesn't show up, the test has gone bad. This isn't to say that if the control line shows up the test is perfect. It can be faulty with a control line but that is very rare. If the control line doesn't show up though it is definitely bad.

They always check specific gravity and most if not all drug tests now check creatinine clearance.