The Quick Answer: It All Depends on Your Consumption
Lots of people ask us: how long does cannabis stay in my system? The fact is THC can be found for anywhere between a few hours to more than 30 days, based on how you use it, how often you use it, and which lab test is used.
Want to know more? Keep reading for clear numbers by product type and test method.
Key Factors that Shape the Timeline
To know your personal window, start with these five points:
- How you use cannabis: smoking a joint clears faster than eating a strong gummy.
- Dose: higher milligrams add time.
- How often you use: daily use builds up in body fat, so THC hangs around longer.
- Body and lifestyle: water, exercise, and body fat change clearance speed.
- Type of test: urine catches use the longest, blood the shortest.
Detection Times at a Glance
Want to know how detection times can vary by ingestion type? Here are the basics.
For flower that is smoked or vaped, THC shows up in urine for one to seven days if you are an occasional user, and up to 30 days if you use every day. A blood test finds it for roughly two to twelve hours. Saliva tests see it for about a day, while hair tests can look back around 90 days.
For THC gummies and other edibles, expect a longer window because the body turns THC into a stronger metabolite that hides in fat. Urine stays positive for three to ten days after a single snack and up to 45 days with heavy use. Blood shows it for four to 24 hours, saliva for up to two days, and hair again for roughly 90 days. Learn more about how long edibles stay in your system.
For concentrates and dabs, the high potency means numbers like edibles. Urine may stay hot for three to ten days if you dab now and then, and up to 45 days with daily sessions. Blood holds it for four to 24 hours, saliva up to three days, and hair up to 90 days.
For topicals such as THC creams**, **the compound does not reach the bloodstream in meaningful levels. Routine urine, blood, or saliva panels seldom flag them, and hair tests rarely matter unless a very sensitive method is used.
These figures come from lab guides issued by the Substance Abuse and Mental Health Services Administration (SAMHSA) together with peer-reviewed trials on THC metabolism.
Flower: Fast In, Fast Out
Smoking or vaping sends THC to the blood in seconds. It also drops fast:
- Urine: casual use clears in about one week.
- Blood: most THC is gone in 12 hours.
- Saliva: plan for a 24‑hour window.
Link this back to our pre rolls selection if you want to enjoy flower while staying mindful of testing dates.
How Long Do Edibles Stay in Your System?
Edibles like our THC gummies move through the gut then the liver, changing THC into the stronger 11‑hydroxy form. That form sticks to fat, so the window is longer:
- Urine: 3–10 days for a single dose, up to 45 days with daily use.
- Blood: 4–24 hours.
- Saliva: up to 48 hours.
Tip: keep an eye on dose in milligrams. A single 5 mg gummy clears faster than a 50 mg gummy flight.
Concentrates and Dabs Pack More THC
Our concentrates lineup includes live resin, rosin, and wax that can top 80 % THC. High potency means more time to clear:
- Urine: expect 10+ days even for a casual dab.
- Blood: 4–24 hours.
- Saliva: up to 72 hours.
If you need an even faster fade, lower‑strength vape carts may help.
Topicals and Tinctures
- Topicals: THC creams stay mostly in the skin, so a basic urine test is unlikely to show use.
- Tinctures: absorbed under the tongue, timing sits between flower and edibles—usually 2–7 days in urine.
Types of Tests in Nevada
Las Vegas jobs often use urine immunoassay first. A lab then runs GC‑MS for proof. Blood tests show only very recent use and cost more, so they are rare.
Saliva tests are growing in roadside checks. Hair tests are common for federal posts and can see back 90 days.
Smart Habits to Clear THC Sooner
While there’s not lots of confirmed evidence for habits that clear THC from your system faster, here are some tips that may help:
- Drink plenty of water, but skip extreme “detox drinks.”
- Eat fiber‑rich food to help fat metabolism.
- Sweat often—light jogging or hot yoga works.
- Get solid sleep; the liver clears THC while you rest.
These steps can trim a day or two, yet nothing resets the clock overnight.
Las Vegas Law: Quick Facts
THC remains a Schedule I substance under federal law, yet in Nevada adults 21+ can buy and use cannabis. State rules bar firing staff for off‑hours use unless it hurts safety. Still, some jobs test. Read the Nevada Revised Statutes, Chapter 613for full text. For more details on employer marijuana testing in Nevada, check our guide.
Common Questions Answered
How long does cannabis stay in your urine if you only took one puff?One puff of low‑THC flower can pass in 1–3 days for most adults.
Does second‑hand smoke count?A 2023 study in Drug and Alcohol Dependence showed no positive urine screens in a ventilated space after one hour with five active smokers.
Will CBD throw a positive?Pure CBD will not, but full‑spectrum oil can have trace THC. Check labels.
Does drinking coffee help?No. Caffeine has no effect on THC breakdown.
Why Body Fat Matters
THC is fat‑soluble. Think of it like dye that soaks into a sponge. People with higher body fat can hold THC traces longer than leaner folks. In one clinical trial, users with body fat above 25 % took about 4 extra days to drop below the standard 50 ng/mL urine level compared to users under 15 %.
Weight changes can also free stored THC, which is why sudden dieting may lead to a surprise positive. Understanding how THCA compares to THC can also help you understand metabolization processes.
How Test Cutoff Levels Change the Story
A standard workplace screen uses a 50 ng/mL cutoff in urine. Parole tests may drop to 20 ng/mL, while some home kits read at 100 ng/mL. Lower cutoffs catch use for longer. Always ask your tester which level they use so you have an accurate plan.
Quick Myth Busters
There are lots of myths around clearing out THC from drug tests. Here are some facts about those myths.
- “Cranberry juice flushes THC.” False. It hydrates you, that’s all.
- “A sauna halves detection time.” Not backed by data. Sweat helps a little but not that much.
- “Hair bleach erases THC.” Labs test inside the shaft, past surface damage.
Stay clear of risky hacks. Stalling or rescheduling is safer than unproven tricks.
See Us in Person
If you have more questions, drop by our dispensary near the Strip or swing down to our Henderson shop. Our guides can walk you through [products that fit both fun and peace of mind](https://greennv.com/how-and-where-to-buy-cannabis-in-las