FSO vs RSO Explained: Can You Smoke RSO and How These Oils Work

TL;DR: Same Plant, Different Punch

FSO and RSO are both highly potent cannabis oils, but they are not the same thing. When comparing FSO vs RSO, full-spectrum oil refers to a broader category of extracts, while Rick Simpson oil is a specific formulation known for very high THC levels and oral use. If you are wondering, “Can you smoke RSO?” the technical answer is yes, but it is generally not recommended due to how it is made and how intense the effects can be.

What Is Full-Spectrum Oil

Full-spectrum oil, commonly called FSO, is a cannabis extract that contains a wide range of naturally occurring compounds from the plant. When making FSO, weed is extracted using solvents that pull cannabinoids, terpenes, and flavonoids into a concentrated oil while preserving the plant’s natural profile. Because FSO refers to a category rather than a single formula, THC and CBD levels can vary depending on the strain and extraction method. 

In dispensary settings, FSO weed is often used as a shorthand term for cannabis derived full-spectrum oil products rather than a reference to the extraction process itself. The final product can range from THC-dominant to more balanced formulations, depending on how it is produced and labeled.

What Is Rick Simpson Oil

Rick Simpson Oil, or RSO, is a specific type of cannabis oil named after a Canadian medical marijuana activist. It became widely known for its use among medical patients seeking strong effects from very small doses.

RSO is typically made using an alcohol based extraction process at higher temperatures. This results in a dark, thick oil that often contains extremely high levels of THC. Because of this potency, RSO is usually consumed orally or applied topically rather than inhaled.

FSO vs RSO Key Differences

When looking at FSO vs RSO, the most important distinction comes down to scope, processing, and expected effects.

  • Category versus specific product: full-spectrum oil is a broad category that describes how an extract is made, while Rick Simpson Oil refers to a specific traditional formulation with a defined history and use case.
  • Extraction approach: Rick Simpson Oil is typically produced using alcohol-based extraction at higher temperatures, while FSOs may be made using varied methods that can preserve more aromatic compounds.
  • Potency range: Rick Simpson Oil is usually very high in THC, while FSOs can range from THC-dominant to more balanced cannabinoid profiles depending on the source material.

RSO often falls under the full-spectrum umbrella, but not every full-spectrum oil meets the criteria to be considered true Rick Simpson Oil. These differences matter when choosing an oil based on tolerance level, intended use, and desired effects.

How to Use FSO and RSO

Both full-spectrum oil and Rick Simpson Oil can be consumed in several ways, but they should always be approached with caution due to their strength. Many people choose sublingual dosing by placing a small amount under the tongue using a syringe, while others prefer mixing the oil into food or beverages.

Some users also apply these oils topically to targeted areas, including muscles and joints, depending on personal preference and experience. Anecdotally, some people report applying a small amount of oil to the belly button during menstrual cramps as part of their routine, though individual results can vary. Because of the intensity of both FSO and RSO, new users should start with very small amounts and increase slowly over time to avoid uncomfortable effects.

Can You Smoke RSO or FSO?

The question, “Can you smoke RSO?” comes up often, especially among experienced cannabis consumers. While it is technically possible to smoke RSO, it is not the method it was designed for and can produce harsh smoke and overwhelming effects.

Some people add a small amount of oil to flower in a joint or bowl, but this approach carries risks due to potency and thickness. FSO products that do not contain added carrier oils are sometimes used similarly, though inhalation is still not the intended or safest option. Choosing lab-tested products and reviewing available Certificates of Analysis can help consumers better understand potency and safety.

How Much Should You Take?

Dosing is one of the most important factors when using cannabis oils. Because both products are highly concentrated, a common starting point is an amount about the size of a grain of rice.

As tolerance and experience increase, dosing can be adjusted gradually. Taking time to understand how your body responds helps ensure a more comfortable and predictable experience.

  1. Start with the smallest measurable amount
  2. Wait several hours before increasing
  3. Track how you feel after each dose
  4. Adjust slowly over multiple sessions
Frequently Asked Questions About FSO & RSO
Is RSO stronger than FSO?

In most cases, RSO is stronger because it is typically made from high-THC cannabis strains and undergoes minimal refinement.

What does FSHO vs RSO mean?

The term FSHO vs RSO usually compares full-spectrum hash oil to Rick Simpson Oil, with the main differences being refinement level and terpene retention.

Is full-spectrum oil beginner-friendly?

Because FSO is highly concentrated, it may feel overwhelming for beginners unless it is carefully dosed and used with guidance.

Know Your Oil: Smart Choices Make Better Sessions

FSO and RSO both offer powerful effects and unique benefits when used responsibly. Understanding how these oils are made and how they differ helps you choose the option that best fits your needs and tolerance level.

Do you prefer FSO or RSO? Can you tell the difference when consuming? Hit me up on social media, and let’s spark up a conversation about it!

By Canna Randa

Canna Randa has been a cannabis evangelist for as long as she can remember. She grew up with a hippie/biker dad and plant-loving mom and always knew the extraordinary benefits of using marijuana medically and recreationally. When cannabis became legal in Illinois, Canna Randa rejoiced and promptly became an EarthMed medical patient. Besides the sticky icky, Canna Randa loves to travel, as well as being outside, meditating, doing energy work on her chakras, and spending time with her family.

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