RSO: Rick Simpson Oil – Quick 2025 Guide
Everything you need in under 3 minutes
What is RSO?
Rick Simpson Oil is a full-spectrum, ultra-high-THC cannabis extract (600–950 mg/g) made famous by Rick Simpson's claim that it cured his skin cancer in 2003. It's dark, thick, and sticky — usually sold in syringes.
Fast facts (2025)
- THC content: 60–95%+
- Best for: chronic pain, insomnia, appetite loss, nausea
- Forms: syringes, capsules, suppositories, edibles
- Average price: $30–60 per gram
- Legal: all medical + adult-use states, Canada, most of Europe
How to dose (beginners)
Start
½ rice-grain size at night only (~25–50 mg THC)
Hold
Wait 3–4 days before increasing dose
Increase
Double every 4 days only if comfortable
Most people settle at 100–300mg/day — not the full 1 g/day originally recommended.
90-day protocol (simplified)
Weeks 1–4: build tolerance slowly
Weeks 5–12: 300–600 mg/day average (many never go higher)
Maintenance: 1–3 rice grains per day
How to use
Sublingual
Fastest onset, 15-30 minutes
Swallow/capsules
Longest lasting, 4-8+ hours
Suppositories
Least psychoactive, high bioavailability
Topical
Localized relief, no high
Never vape or smoke RSO — too thick and contains residuals unsafe for inhalation
Storage
Refrigerate in syringe. Lasts 2–3 years. Warm before use by holding in your hand or placing in warm water.
Where to buy (2025 top brands)
Papa & Barkley • Mary's Medicinals • Wana • Select • Tilray
Quick FAQ
Same as FECO?
No — FECO is cleaner, smoother, medically preferred
Will I get high?
Extremely — THC versions are very psychoactive. Suppositories = almost none
Cures cancer?
No proof, but great for symptom management and palliative care