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Organic Care of California BLOG

 Here is a few Blogs written by the owners Chaz & Shantel Cornellier about the industry and things they have experienced or learned while owning a cannabis delivery service in Chico, Ca in 2017 under Prop 215 and then moving to Sacramento to own a State Liscensed Delivery, C9-0000003-LIC, immediately in 2018. It has been a crazy ride and Chaz loves to explain what the market is doing and how he sees the company doing in the near future.

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Blog / / FSO vs. RSO in Cannabis: Understanding the Differences and Applications

FSO vs. RSO in Cannabis: Understanding the Differences and Applications

Marijuana has been used for various medicinal and recreational purposes for centuries. As our understanding of its components has deepened, we've developed new ways to extract and utilize its therapeutic potential. Two popular cannabis extracts, Full-Spectrum Oil (FSO) and Rick Simpson Oil (RSO), have gained significant attention in recent years. In this blog, we will delve into the distinctions between FSO and RSO and explore their respective uses in the world of cannabis.

Full-Spectrum Oil (FSO)

Full-Spectrum Oil, often abbreviated as FSO, is a cannabis extract that captures the full range of cannabinoids, terpenes, and other beneficial compounds found in the cannabis plant. Unlike some other extraction methods, FSO is designed to preserve the natural synergy of these compounds, commonly referred to as the "entourage effect."

Extraction Process

The process of creating FSO involves carefully extracting the entire spectrum of compounds from the cannabis plant. This is usually done using a solvent, such as ethanol or CO2, which separates the cannabinoids, terpenes, and other active molecules from the plant material. The result is a highly concentrated oil that retains the full array of compounds present in the original plant.


FSO is a complex mixture of various cannabinoids, including THC (tetrahydrocannabinol), CBD (cannabidiol), CBG (cannabigerol), and many others. It also contains a diverse range of terpenes, which are responsible for the unique aroma and flavor of different cannabis strains.

 Uses of Full-Spectrum Oil (FSO)

 Medicinal Applications
One of the primary uses of FSO is for medicinal purposes. The entourage effect, resulting from the diverse composition of cannabinoids and terpenes, is believed to enhance the therapeutic benefits of cannabis. Some common medical uses of FSO include:
Pain management: FSO is often used to alleviate chronic pain, including neuropathic pain and inflammation.
Anxiety and depression: Certain FSO formulations are designed to provide relief from symptoms of anxiety and depression.
Epilepsy: FSO high in CBD has been used to reduce the frequency and severity of seizures in individuals with epilepsy.
Cancer treatment: While not a cure, FSO is used as a complementary therapy to help manage the side effects of cancer treatments, such as chemotherapy-induced nausea and pain.

Recreational Use

FSO is also used recreationally, particularly by those who seek a more balanced and nuanced cannabis experience. It offers a wider range of effects compared to isolated cannabinoids, making it a preferred choice for some recreational users.

Rick Simpson Oil (RSO)

Rick Simpson Oil, commonly known as RSO, is a highly concentrated cannabis extract named after its creator, Rick Simpson. RSO is renowned for its high THC content and its simplicity in terms of production.

Extraction Process

RSO is typically made using a simple solvent extraction method that involves soaking cannabis plant material in a solvent (often isopropyl alcohol) to dissolve the cannabinoids and other active compounds. The resulting liquid is then filtered and evaporated to produce a thick, tar-like oil.


RSO is exceptionally high in THC, often containing well over 90% THC. It lacks the diversity of cannabinoids and terpenes found in FSO, as it is primarily focused on extracting THC.

Uses of Rick Simpson Oil (RSO)

Medicinal Applications
RSO gained notoriety for its supposed cancer-curing properties, as advocated by Rick Simpson himself. However, it's crucial to note that these claims are not scientifically validated, and RSO is not a proven cancer cure. Nevertheless, some individuals use RSO for various medical purposes:
Pain relief: RSO may be used to manage severe pain, particularly in cases where other treatments have failed.
Sleep disorders: Some individuals find RSO helpful for improving sleep quality and addressing insomnia.
Anxiety and stress: The high THC content in RSO can provide a potent relaxation effect for those seeking relief from anxiety and stress.

Recreational Use

Due to its high THC content, RSO is not commonly used for recreational purposes by casual users. It is usually reserved for individuals with a high tolerance for THC who seek intense psychoactive experiences.

Comparing FSO and RSO

 THC vs. CBD Dominance
One of the most significant differences between FSO and RSO is their cannabinoid profiles. FSO typically contains a more balanced ratio of THC to CBD and other cannabinoids. In contrast, RSO is predominantly THC-centric, with minimal CBD content. This distinction has important implications for their effects and applications.

Entourage Effect

FSO is designed to harness the entourage effect, where the interaction of multiple cannabinoids and terpenes enhances their therapeutic potential. RSO, on the other hand, lacks this diversity and may not offer the same multifaceted benefits.

 Dosage and Potency

Due to its high THC concentration, RSO is extremely potent. Users must exercise caution when dosing to avoid overwhelming psychoactive effects. FSO, with its balanced cannabinoid profile, offers more flexibility in dosing and is generally considered less intense in terms of psychoactivity.

Finding the Right Extract for You

Consultation with a Healthcare Professional
Before using any cannabis extract, it is essential to consult with a healthcare professional, especially if you are considering it for medicinal purposes. A healthcare provider can offer guidance on the most suitable extract and dosage for your specific needs.
Personal Preferences and Tolerance
Your personal preferences and tolerance to THC and other cannabinoids should also play a significant role in your decision. If you are new to cannabis or have a low tolerance, FSO may be a more appropriate choice due to its balanced composition and milder effects. In contrast, individuals with a higher THC tolerance may find RSO more suitable for their needs.


In the world of cannabis, Full-Spectrum Oil (FSO) and Rick Simpson Oil (RSO) represent two distinct approaches to cannabis extraction, each with its own set of characteristics and applications. FSO captures the full spectrum of cannabinoids and terpenes, offering a more balanced and versatile experience, while RSO is high in THC and is often associated with its purported cancer-curing properties. Ultimately, the choice between FSO and RSO should be based on individual needs, preferences, and guidance from healthcare professionals. Regardless of your choice, it is crucial to use cannabis extracts responsibly and in compliance with local laws to maximize their potential benefits while minimizing potential risks.