Introduction
As medical cannabis use continues to expand across the United States, many patients are asking the same question: should I use Rick Simpson Oil (RSO) or Full Extract Cannabis Oil (FECO)?
Both are high-potency, full-spectrum cannabis oils known for helping with conditions such as cancer, chronic pain, neurological disorders, and inflammation. Yet, their extraction methods, safety profiles, and consistency set them apart.
In this guide, we compare RSO vs FECO to help you understand which option may be safer, more effective, and better suited to your needs in 2025.
What Is RSO?
Rick Simpson Oil (RSO) is a thick, tar-like cannabis extract made using solvents such as isopropyl alcohol or naphtha. It contains very high levels of THC (typically 70–90%), alongside CBD, minor cannabinoids, and natural terpenes.
RSO was originally developed by Rick Simpson himself as part of his personal approach to treating skin cancer. Today, it’s used widely to support:
- Cancer treatment recovery
- Chronic and neuropathic pain
- Appetite stimulation during chemotherapy
- Sleep improvement and anxiety management
However, because RSO is often homemade or produced using industrial solvents, safety and purity can vary greatly. That’s why sourcing from a lab-tested, verified supplier such as Rick Simpson Oil for Sale is essential.
What Is FECO?
Full Extract Cannabis Oil (FECO) is another full-spectrum cannabis concentrate, but it’s made using food-grade ethanol or CO₂ — both considered much safer solvents.
Unlike RSO, FECO is almost always lab-tested for potency and purity. It retains a complete cannabinoid and terpene profile, including THC, CBD, CBG, and CBC.
FECO is often used for:
- Cancer and chronic inflammatory diseases
- Epilepsy and seizure management
- Autoimmune and digestive disorders
- Anxiety, insomnia, and mood support
Because of its cleaner extraction and consistent results, FECO is more widely available in licensed U.S. dispensaries than RSO.
Key Differences Between RSO and FECO
| Feature | RSO | FECO |
|---|---|---|
| Solvent Used | Isopropyl alcohol, naphtha | Food-grade ethanol, CO₂ |
| Safety Profile | Variable — risk of residual solvents if untested | High — clean, food-safe solvents |
| Taste & Texture | Bitter, thick, tar-like | Smooth, mild, and easier to handle |
| Product Consistency | Often varies (especially homemade) | Standardized and lab-verified |
| Availability | Common in legacy markets and some dispensaries | Widely available in licensed dispensaries |
| Lab Testing | Optional (often missing from homemade batches) | Mandatory for legal dispensaries |
| Popular Uses | Cancer, chronic pain, palliative care | Cancer, epilepsy, inflammation, daily wellness |
Which Oil Is Safer to Use?
From a safety standpoint, FECO has a clear advantage.
- It’s extracted with food-grade ethanol or CO₂ — both non-toxic and clean.
- Licensed dispensaries must test FECO for solvents, pesticides, and potency.
- There’s little to no risk of chemical contamination when purchased from a certified source.
RSO can still be safe — but only when purchased from a verified, lab-tested manufacturer such as Rick Simpson Oil for Sale. Homemade versions using industrial solvents pose potential risks, especially for immunocompromised patients or long-term users.
If purity and medical consistency are your top priorities, FECO is the safer option.
Which Oil Is More Effective?
Both oils deliver full-spectrum cannabis therapy, but their effectiveness depends on the user’s health condition and tolerance.
- Cancer patients often prefer RSO because of its intensity and established use in the RSO Protocol.
- Neurological and autoimmune patients may lean toward FECO due to its purity and predictable microdosing.
- Chronic pain or insomnia patients can benefit from either, though RSO tends to be more potent.
In summary: RSO is raw and robust, while FECO is refined, safer, and easier to measure accurately.
Availability Across the U.S. (2025)
Both RSO and FECO are widely available wherever medical or adult-use cannabis is legal.
- FECO dominates dispensary shelves because of its regulated production and packaging.
- RSO, sometimes labeled as Phoenix Tears, remains popular among long-time cannabis users and holistic practitioners.
- Several dispensaries now stock both, allowing patients to choose based on medical advice and comfort.
Always check for Certificates of Analysis (COAs) and ensure you’re purchasing from a licensed, compliant source such as Rick Simpson Oil for Sale.
How to Choose Between RSO and FECO
If you’re trying to decide between the two, ask yourself:
- Do you need solvent-free, lab-verified purity? → Choose FECO.
- Are you following Rick Simpson’s 60g/90-day cancer protocol? → Choose RSO.
- Do you want consistent dosing and medical compliance? → Choose FECO.
- Are you on a budget and sourcing carefully? → RSO may be more cost-effective.
Whichever oil you select, always begin with a low dose, increase slowly, and consult a medical cannabis professional before making adjustments.
Final Thoughts: RSO or FECO — Which Should You Choose?
RSO and FECO are both powerful, full-spectrum cannabis extracts capable of providing real therapeutic relief.
- RSO is trusted by long-time patients and is ideal for intensive cancer protocols.
- FECO is preferred by clinics and dispensaries for its cleaner extraction and standardized results.
The best choice depends on your health goals, tolerance, and comfort with potency.
For verified RSO options, explore Rick Simpson Oil Capsules, RSO Gummies, and RSO Tinctures.
To learn more about cannabis oil research and safety standards, visit Project CBD.