Urine, Saliva and hair are the most common drug test used. These tests are performed as per the detection timing of the sample. Urine have the highest detection time than saliva. There are many other factors that can influence the THC level in our system.
- Body Fat
- Amount used
- Frequency of use
For each individual these factors vary greatly and there are no definitive guidelines to say that the results will be positive.
On a Urine Drug test, THC appears to have a positive impact when used for 2 to 5 hours. So the test is estimated based on the frequency of use but weight and body fat is not taken into account for marijuana user.
A person who have used marijuana for the first time will show up positive signs when used with in 1 to 6 days. In the case of a moderate user it will last for 7 to 13 days, for a frequent user the test will show positive results for 15+ days, when it comes to heavy user the positive signs will last for 30 or more days and for heavy pot smokers are reported to have positive signs for 45 to 90 days.
When it comes to saliva test THC will come positive within one hour of use but it may show up positive signs for the next 12 hours. On a hair test THC value will be shown for about 7 days but most of the hair drug test will show up positive signs for up to 90 days.
The most reliable way to find out THC in the system is to use drug by performing the test on yourself.
What they look for in the test?
These tests are done in order to find out just of the kind of metabolites of THC. Metabolites is basically a chemical produced when another chemical is taken by the body. This is also referred to as THC COOH. If you had taken marijuana just last night then also it will show up the positive impact in your body and read more here about how long does THC stay in your system. If its not in your urine then your hairs will tell the truth. If you had taken marijuana last night then it will show up the positive signs for up to 3 days or so.
There are some steps that you can use in order to lower up the amount of THC in your system.