Rick Simpson Oil is one of the most potent cannabis products available, but it’s not technically the strongest by raw THC percentage. A typical RSO syringe contains 60% to 80% THC, which translates to roughly 600 to 800 mg of THC in a single gram. That’s far more concentrated than cannabis flower, but cannabis distillates can reach 90% to 99% purity. So why do so many people experience RSO as the most powerful option? The answer has less to do with THC percentage and more to do with what else is in the oil.
RSO vs. Distillate: Why THC Percentage Isn’t Everything
If you’re comparing products purely by THC content, distillates win. These refined oils isolate a single cannabinoid and strip away nearly everything else, including terpenes, flavonoids, and minor cannabinoids. The result is a clean, potent product that can test above 95% THC.
RSO takes the opposite approach. It’s a full-spectrum extract, meaning it retains the full chemical profile of the cannabis plant. That includes not just THC but also CBD, dozens of minor cannabinoids, terpenes, and flavonoids. The trade-off is a lower THC percentage on the label, but users frequently report that RSO hits harder and produces more well-rounded effects than a distillate with a higher number.
This is where the concept known as the “entourage effect” comes in. The idea is that cannabis compounds work together synergistically, producing a stronger or more therapeutic outcome than any single compound on its own. Terpenes, for example, may improve how easily THC crosses into the brain. CBD can slow the liver’s breakdown of THC, potentially keeping it active in your system longer. While the exact mechanisms are still being studied and clinical proof at the receptor level is limited, the theory is widely cited to explain why full-spectrum products like RSO often feel more potent than their THC numbers suggest.
How RSO Compares to Other Cannabis Products
To put RSO’s potency in context, here’s how common cannabis products stack up:
- Cannabis flower: Typically 15% to 30% THC. You’d need to consume several grams of high-quality flower to match the THC in a single gram of RSO.
- Standard edibles: Usually dosed at 5 to 10 mg of THC per serving. One gram of RSO contains 600 to 800 mg, equivalent to 60 to 160 standard edible doses.
- THC distillate: Higher THC concentration (90% to 99%) but lacks the supporting compounds. Often used in vape cartridges or as an ingredient in edibles.
- THC isolate: Pure crystalline THC at 99%+. The highest possible concentration, but a single-compound product with no entourage compounds.
RSO occupies a unique space. It’s not the highest in THC percentage, but it delivers an unusually large dose of THC alongside a complex mix of other active compounds. For many users, that combination produces the strongest subjective experience of any cannabis product they’ve tried.
Why RSO Feels So Strong When Eaten
RSO is almost always consumed orally, either swallowed directly, placed on food, or held under the tongue. This matters because oral THC is processed differently than inhaled THC. When you swallow THC, your liver converts it into a metabolite called 11-hydroxy-THC, which crosses into the brain more efficiently and produces notably stronger psychoactive effects than THC absorbed through the lungs.
Placing RSO under the tongue (sublingual use) sends some of the THC directly into the bloodstream through the mucous membranes, with effects starting within minutes. Swallowing it means waiting 30 minutes to 2 hours for onset, depending on your metabolism and whether you’ve eaten recently, but the effects last significantly longer and often feel more intense. Many people who use RSO for sustained relief prefer swallowing it for exactly this reason: slower onset, but deeper and more prolonged effects.
The Rick Simpson Protocol
The original RSO protocol, developed by Rick Simpson for his own use, calls for consuming 60 grams of THC-rich oil over a 90-day period. Users start with a very small dose, often the size of a grain of rice, and gradually increase to around 1 gram per day. At 60% to 80% THC, this means ingesting 600 to 800 mg of THC daily at the peak of the protocol.
For perspective, a standard recreational edible dose is 5 to 10 mg. The full protocol’s daily target is roughly 60 to 160 times that amount. This is an extraordinarily high dose by any standard, and it’s why RSO has a reputation for being the strongest cannabis product, even if distillates technically contain more THC per gram. Very few people consume distillate in the quantities that the RSO protocol calls for.
Anyone considering these doses should understand that tolerance builds rapidly at this level. Most people who follow the protocol report intense psychoactive effects in the first weeks that gradually diminish as their tolerance catches up. Starting low and increasing slowly is not optional with RSO. Jumping to a large dose without building tolerance can produce overwhelming effects that last for hours.
Purity and What to Watch For
RSO is traditionally made using ethanol or isopropyl alcohol as a solvent to strip cannabinoids from the plant material. The solvent is then evaporated off, leaving behind the thick, dark oil. Both ethanol and isopropyl alcohol are classified as low-toxicity solvents, with regulatory limits allowing up to 5,000 parts per million of residual solvent in finished products.
Commercially produced RSO sold through licensed dispensaries is typically lab-tested for residual solvents, pesticides, and cannabinoid content. Homemade RSO, which is still common given the product’s DIY origins, carries more risk because there’s no testing to confirm the solvent was fully removed or that the starting material was clean. If you’re buying RSO, look for products with a certificate of analysis showing both cannabinoid potency and residual solvent levels.
The dark color and thick consistency of RSO can also vary between batches. This is normal for a full-spectrum extract. Unlike the golden clarity of a distillate, RSO’s appearance reflects the plant waxes, chlorophyll, and other compounds that remain in the final product.
So Is RSO the Strongest?
By pure THC concentration, no. Distillates and isolates contain more THC per gram. But “strongest” depends on what you mean. RSO delivers a massive THC dose in a format that’s eaten rather than smoked, activating the more potent liver metabolite. It retains a full spectrum of cannabis compounds that may amplify THC’s effects. And the traditional dosing protocol pushes consumption to levels that dwarf typical edible use. In terms of the overall experience, RSO is consistently one of the most powerful cannabis products most people will encounter.