Full Spectrum CBD: How Long Will .3% THC Stay in My System?

Many CBD products contain trace amounts of THC, which leads people to ask themselves, ‘how long will it stay in my system?’ The answer to this question is not so straightforward, though. Several factors affect how long THC will stay in your systems, such as your metabolism, amount of body fat, and how frequently you partake in CBDs that contain THC. If you are subject to drug tests regularly or have an upcoming test, possibly for new employment, you may need to adjust your CBD regimen or switch products to ensure you do not test positive for THC. 

How much THC is in Full Spectrum CBD?

Federally, legal CBD products must be hemp-derived and contain .3% THC or less. At the state level, CBD regulations vary greatly, so you can find a wide range of CBD products that contain varying amounts of THC depending on where you are. However, most CBD products follow federal guidelines and contain .3% THC or less. 

There are three main types of CBD: full-spectrum CBD, broad-spectrum CBD, also called THC-free, and CBD isolate. While all three types pose significant health benefits, they vary significantly in THC content. 

CBD isolate products contain CBD and CBD alone. No other compounds or cannabinoids from the plant are used. 

In addition to CBD, full-spectrum CBD contains THC, CBN, CBC, CBG, other cannabinoids, and terpenes

THC-free or broad-spectrum CBD retains all the same compounds found in full-spectrum CBD except for THC. 

Can 0.3% THC Show Up in Drug Tests?

Drug tests are designed to detect specific illicit substances, THC included. Even if you only consume THC in full-spectrum CBD products, which can contain .3% THC or less, these trace amounts can show up in drug tests. THC can be detected in blood, hair, and urine tests for many days after ingestion. 

Does CBD Show Up in Drug Tests?

Currently, drug tests do not screen for CBD. However, as you now know, many CBD products contain minimal amounts of THC, which can be spotted on a drug test. As a result, CBDs could theoretically cause you to fail a drug test. Unless, of course, you only use THC-free CBDs. Nonetheless, always use CBDs purchased from a reliable source, like Saving Grace, and you can trust that their broad spectrum THC-free products are genuinely THC-free. 

How Long Does THC from Full Spectrum CBD Stay in Your System?

Since full spectrum CBD contains trace amounts of THC (.3%), the THC component of CBD could stay in your system – and be detected – for as many as 30 days. 

There are four commonly used types of drug tests: urine, blood, salivary, and hair follicle. How long CBD that contains THC stays in your system depends on what kind of drug test is being used. 

The most common drug test is a urine analysis. For example, THC can be detected in your urine for 3 to 30 days. This seems like a large window of time, but there are a few external factors, which we will discuss coming up, that contribute to this wide range. 

Typically, a salivary test can register THC for 24 to 72 hours. However, salivary drug tests for THC are relatively new and less commonly used. 

Blood tests have the shortest detection window and can only identify THC for approximately 4 hours. 

Hair follicle drug tests can detect THC in your system for as many as 90 days. However, while they are the most sensitive drug test for THC, they are not always reliable and are often quite expensive, so they are not commonly used.

What Factors Can Influence THC Detection in Drug Tests?

The amount of time .3% THC, or any amount of THC, stays in your system also varies considerably based on several influential external factors. 

THC Dosage and Frequency 

The amount of THC you ingest or apply and the frequency at which you do so can drastically affect how long it can be detected in your system by a drug test. The higher the dosage, the longer it will stay in your system. 

Similarly, the more you regularly use it, the longer it will stay in your system. THC has a cumulative effect on your body, so if you ingest it daily, it will remain in your system for longer than an infrequent or first-time user. 


For THC to leave your system, your body must metabolize it as quickly as possible. Therefore, if you have a faster metabolism, you can expect THC to leave your system faster than someone with a slower metabolism. 

Body Fat

THC is often stored in your body’s fat. This means THC can be expelled from the body faster for leaner individuals. In addition, men generally have less body fat than women, so they may be able to metabolize THC more quickly.  


Exercise does not directly help your body rid itself of THC at a faster rate. However, it may be able to increase your body’s metabolism, which breaks down fat where THC is often stored. This process could release a higher concentration into your testable system. 


Another factor that can raise THC concentration in your body is dehydration. If you are worried about whether or not you can successfully pass a drug test, making sure you are not dehydrated can, at the very least, help lower the concentration of THC in your urine or blood. 

Many people believe flushing your system with excessive amounts of water before a drug test can help you pass, but there is no concrete evidence that this tactic will have much effect. Instead, proper hydration is all that is needed.

Drug Tests and Using CBD

While plenty of factors can affect how long .3% THC stays in your system, the most important is time. Some people may metabolize THC faster than others. Still, if you are approaching a drug test, the only sure way to avoid failing is by giving yourself plenty of time without consuming any THC at all – even such a small amount as what is contained in CBD. 

Whether you need to pass a drug test or not, Saving Grace has a variety of reliable THC-free and full-spectrum CBD products that can accommodate your personal needs while bringing you many health benefits.


author avatar
Jack Studebaker

Leave a Reply

Your email address will not be published. Required fields are marked *