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02/20/2026

02/20/2026

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Cannabinoids can trigger cancer cell death and stop tumor growth.

Your body is already built to interact with cannabis.

It is called the endocannabinoid system. Inside you right now, there is a vast network of receptors regulating your sleep, appetite, memory, and immune system. Your body produces its own molecules, called endocannabinoids, to keep this system running. The reason the cannabis plant affects us is that its active compounds look strikingly similar to the ones we produce naturally. They fit into our receptors like a key in a lock.

And that lock might be the key to fighting cancer.

In laboratory studies, scientists have found that when cannabinoids bind to these receptors on the surface of cancer cells, extraordinary things can happen. The reaction can block the cell growth cycle, cut off the blood supply tumors need to survive, and even trigger "cell death," essentially commanding the cancer cell to commit su***de.

This mechanism is showing promise in early clinical trials. In a small study involving patients with glioblastoma, an aggressive brain tumor, researchers tested a cannabis-based medicine called Sativex alongside standard chemotherapy. The results were striking: 83 percent of patients using the cannabis therapy were alive after one year, compared to just 44 percent in the group taking a placebo.

However, experts urge caution. Cancer Research UK notes that while these results are exciting, a petri dish is not a person. The high concentrations of purified cannabinoids used in labs are very different from smoking or ingesting street cannabis, which contains unpredictable levels of compounds.

We are not at a cure yet. But by studying how these receptors work, scientists hope to turn the body's own system into a precision weapon against the disease.

Learn more:
"Cannabis, cannabinoids and cancer – the evidence so far." Cancer Research UK, 2022.