How Long Does Cannabis Stay in Your System?

The length of time cannabis stays in your system depends on how often someone uses it, their metabolism, and the testing method. This post breaks down the key points in simple terms.

What Changes Detection Time
How often someone uses cannabis is one of the biggest factors in how long it can be detected.

More frequent or higher-dose use generally means longer detection times.

Common Testing Methods
Frequent users often test positive in urine for much longer than occasional users.

THC vape carts clears from blood faster than it does from urine.

Saliva tests typically detect cannabis for about 24–72 hours, with longer windows possible in frequent users
.

Hair tests can detect cannabis use for up to 90 days or more, because metabolites become trapped in growing hair over time
.

What People Should Know
Detection windows depend on the test type and how often someone uses cannabis.

Impairment and detection are not the same thing.

Common Questions
Question 1
It depends on the test type and frequency of use. Urine can range from 1–3 days to 30+ days, blood about 1–7 days, saliva 1–3 days, and hair up to 90 days or more
.

Question 2
Yes. Frequent or daily use leads to more buildup of THC metabolites, which extends detection time in urine, blood, saliva, and hair
.

Question 3
The body clears cannabis metabolites gradually over time.

Key Takeaway
Understanding these differences helps people set realistic expectations about cannabis testing.