How Is RSO Made? Understanding the Process Behind Rick Simpson Oil

Why This Matters

For many people, RSO isn’t just another cannabis product—it represents a more concentrated and intentional way of working with the plant.

Caregivers often look into RSO when they want something more efficient or easier to administer than smoking or traditional edibles. Veterans may explore it while searching for ways to manage stress, sleep challenges, or discomfort from service-related experiences. Others may simply be trying to support quality of life in a more natural way.

Knowing how RSO is made gives you a closer look at the product in your hands. Where did the plant come from? How was the oil prepared? What does the batch report tell you? Those are useful questions when you're looking for quality and consistency.

There’s also a practical side. Concentrated oils behave differently than other forms of cannabis. They can feel more intense, last longer, and vary more widely between batches. Knowing the production process gives context to those differences, which can help people approach it more thoughtfully and safely.

At its heart, this topic is about informed choice—understanding what something is before deciding whether it fits into someone’s wellness approach.

What RSO Actually Is

RSO is a full-spectrum cannabis extract that results in a thick, tar-like oil. It’s typically very dark in color and highly concentrated compared to raw plant material.

Unlike products that isolate a single cannabinoid (like THC or CBD), RSO is generally made to keep a broader profile of the plant intact. That means it may contain cannabinoids, terpenes, fats, waxes, and other naturally occurring compounds.

People often describe it as “whole plant in a syringe,” which gives a simple mental picture of what it represents. Instead of breaking the plant down into isolated parts, the idea is to carry as much of it through the process as possible.

The Origins of RSO

The name “Rick Simpson Oil” comes from Rick Simpson, a Canadian cannabis advocate who popularized the idea of using a concentrated cannabis oil after his own experience exploring plant-based wellness approaches.

His original method focused on creating a strong extract using cannabis and a solvent-based process, with the goal of capturing a broad spectrum of plant compounds in a usable oil form.

While many variations now exist, the core idea remains the same: concentrate the plant into an oil while preserving as much of its natural chemical profile as possible.

Over time, different communities and producers have adapted the concept, using different solvents and refinement methods, but the name “RSO” has stayed widely used to describe this general style of full-spectrum extract.

The Core Idea Behind Making RSO

At a simple level, making RSO is about separation and concentration.

Cannabis flower contains a wide range of compounds inside its plant material. Some of those compounds are desirable in concentrated form, while others are not soluble in oil or are left behind.

The basic idea is:

1. Use a liquid (solvent) that can pull desirable compounds out of the plant material.
2. Separate the liquid from the solid plant matter.
3. Remove the solvent, leaving behind a concentrated oil.

What remains is a dense extract that carries many of the plant’s original compounds in a much smaller volume.

It’s less about “creating” something new and more about refining what’s already there.

Solvents Used in RSO Production

Solvents are an essential part of how RSO is made, because they act as the “carrier” that pulls compounds out of plant material.

Commonly discussed solvents in RSO-style extraction include:

• Food-grade ethanol – Often used because it can effectively dissolve a wide range of plant compounds and is considered more familiar in food and beverage contexts.
• Hydrocarbon solvents – Such as butane or similar compounds, used in other types of cannabis extraction methods (though not always associated directly with traditional RSO).
• Other alcohol-based solvents – In some approaches, different alcohol concentrations may be used depending on the desired outcome.

In all cases, the role of the solvent is temporary. It is not meant to remain in the final product. Instead, it is used to separate plant compounds and then removed during later stages of processing.

The choice of solvent can influence flavor, purity, and overall composition of the final oil.

From Plant to Oil: A General Overview

While methods vary, the transformation from cannabis flower to RSO generally follows a few broad stages:

First, plant material is prepared. This usually involves drying and breaking it down into smaller pieces so that the surface area is increased. More surface area allows the solvent to interact more effectively with the plant material.

Next, the plant material is combined with a solvent, which begins drawing out cannabinoids, terpenes, and other compounds into a liquid solution.

Once the compounds are extracted, the solid plant matter is removed, leaving behind a mixture that contains both the solvent and the extracted plant compounds.

The final stage involves carefully removing the solvent, leaving behind a thick, concentrated oil. What remains is the finished RSO.

Each stage influences the final result. Small differences in plant quality, timing, temperature control, and handling can all affect consistency and potency.

Why Full-Spectrum Extraction Matters

One of the defining characteristics of RSO is its full-spectrum nature.

Instead of isolating a single compound like THC or CBD, RSO aims to preserve a wider range of what the plant naturally contains. This includes minor cannabinoids and aromatic compounds known as terpenes.

Many people are drawn to full-spectrum extracts because they believe the combination of compounds works together in a more balanced way than isolated components alone.

At the same time, it’s important to understand that full-spectrum does not mean identical from batch to batch. The final composition can vary depending on the strain of cannabis used, growing conditions, and extraction method.

That variability is part of what makes RSO both interesting and sometimes unpredictable.

Safety, Purity, and Real-World Considerations

When people ask “How Is RSO Made?”, they’re often also asking, “Is it safe?”

The answer depends heavily on how it is produced.

Because RSO involves solvents and concentrated plant material, the quality of the final product is closely tied to proper handling and purification. Incomplete removal of solvents, inconsistent starting material, or poor processing conditions can all affect safety and consistency.

This is why RSO produced in regulated environments tends to be more standardized, while homemade or unregulated versions can vary significantly.

Another consideration is potency. RSO is highly concentrated compared to other cannabis forms, which means small amounts can feel much stronger than expected. This is one reason people are encouraged to approach it slowly and carefully, especially if they are new to concentrated oils.

Different Ways People Talk About Making RSO

In conversations about RSO, you’ll often hear different terms or variations:

Some people refer to alcohol-based extraction methods, especially using food-grade ethanol. Others talk more generally about solvent-based extraction, which can include different approaches depending on the producer or region.

There are also differences in refinement. Some versions of RSO are more filtered or clarified, while others remain closer to a raw, unrefined oil that retains more plant compounds.

Even though the methods may vary, the goal remains consistent: create a concentrated, full-spectrum cannabis oil that preserves as much of the plant’s original character as possible.