WHAT IS 11-OH-THC

11-Hydroxy-Δ9-THC (11-OH-THC) is the primary metabolite produced when the liver processes Δ9 THC. When you eat a cannabis edible, the THC passes through the digestive tract and into the liver via the portal vein. Liver enzymes (specifically CYP2C9 and CYP3A4) hydroxylate the molecule, adding a hydroxyl group at carbon 11. This produces 11-OH-THC.

The metabolite is more pharmacologically active than the parent Δ9 THC. 11-OH-THC binds CB1 receptors more strongly than Δ9 and produces more intense psychoactive effects. This is the explanation for why edibles feel stronger and longer-lasting than smoking the same milligram dose of Δ9.

Smoking and dabbing largely bypass first-pass liver metabolism. Inhaled THC enters the bloodstream through the lungs and reaches the brain before significant liver processing. Result: less 11-OH-THC produced, more direct Δ9 action.

WHY EDIBLES FEEL DIFFERENT

When you smoke 10mg of Δ9 THC, your bloodstream sees mostly Δ9 with some 11-OH-THC produced over time. Effects peak at 30-60 minutes, last 1-3 hours, and feel like classic THC.

When you eat 10mg of Δ9 THC, the liver converts much of it to 11-OH-THC before it reaches the brain. The bloodstream sees a mixed Δ9 + 11-OH-THC profile, with the metabolite often higher in concentration than the parent. Effects peak at 2-3 hours, last 4-8 hours, and feel more body-heavy and immersive than smoking.

This is why edibles are notorious for catching new users off-guard. A 10mg edible doesn’t feel like 10mg of smoking — it feels closer to 15-25mg of smoking, with 4-8 hour duration vs 1-3 hours.

PRACTICAL IMPLICATIONS

For new edible users: start at 2.5-5mg, wait 2 hours minimum before re-dosing. The "I don’t feel anything yet, let me take more" mistake produces hours-long over-intoxication.

For drug testing: 11-OH-THC is detected by all standard cannabis drug tests as part of the THC metabolite panel.

For experienced consumers seeking edible-style effects without commitment: micro-dosing 2.5mg edibles 90 minutes before a session lets you titrate the experience.