Highs and Hearts: What Cannabis Really Does to Your Body in the First 24 Hours — And the Surprising Science Behind It
0–10 Minutes: The First Rush Whether smoked or vaporized, cannabis begins exerting effects almost immediately. When inhaled, Δ9‑tetrahydrocannabinol (THC) — the primary psychoactive compound — passes quickly from the lungs into the bloodstream, circulating through the body and reaching the brain within minutes. One of the earliest physical responses is a noticeable increase in heart