Many of you had questions and comments about the show. Here, one of our Specialist Nurses, Sophie, answers some commonly asked questions.
Staying a healthy weight may also mean your prostate cancer is less likely to spread after surgery or radiotherapy. And if you’re having hormone therapy to treat your prostate cancer, your treatment may be less effective if you’re very overweight.
Q. Can cannabis help cure prostate cancer?
It’s important to remember that it’s illegal to grow or sell cannabis in the UK. It’s also illegal to have any cannabis-based products, unless a doctor has prescribed them for medicinal use. CBD oil is legal, but only if it contains extremely low levels of THC (less than 0.2%). However, there’s little evidence to suggest CBD oil benefits cancer patients and there are still a lot of unanswered questions.
At the moment, we don’t know if cannabis can help treat prostate cancer. Some studies have looked at the effect of chemicals in cannabis, called cannabinoids, on prostate cancer cells. There are two main cannabinoids that have been investigated – THC (tetrahydrocannabinol) and CBD (cannabidiol). The studies found that cannabinoids may stop prostate cancer cells from growing and dividing, cause prostate cancer cells to die, and stop prostate cancer cells from invading other tissues and spreading.
But these studies have only looked at prostate cancer cells grown in laboratories or in mice. There’s a long way to go in understanding whether there might be similar effects in patients. Cells can behave very differently in humans, so we need clinical trials in humans to see if cannabinoids could be used to treat prostate cancer. We also don’t yet understand the mechanism by which the cannabinoids prevent prostate cancer cells from growing or dividing either.
These patients include those who have localised prostate cancer where active surveillance is followed, those with biochemical recurrence after treatment, and patients with metastatic PCa. I have always wondered whether cannabis oil could indeed be a cure for prostate cancer. Unfortunately, I do not see in practice the desired beneficial effect and the PSA values continue to rise. To find some answers, I did a search in scientific literature.
In the 1990s, the endocannabinoid system (ESC) of the body was discovered by Raphael Mechoulam, an Israeli professor of medical chemistry. The endocannabinoid system, a central regulatory system, is the body’s largest receptor system and is important to maintain the homeostasis of the body.
Cannabis, a very easy plant to grow, has been used for centuries for its medicinal properties. The oldest known document about cannabis use originates from the Chinese emperor Shen Nung in 2727 B.C. It suggested that cannabis has a neuron-protective effect. The Egyptians used cannabis to treat glaucoma and as an anti-inflammatory agent (inflammation of the eyes, fever). Cannabis was even used in obstetrics (mixed with honey) and the mixture was applied in the vagina to “cool” the uterus. In the Old Testament, there is also an account of God instructing Moses to make a holy anointing olive oil-based “Kaneh Bosm.”
Use of cannabis in cancer
Cannabis contains more than 400 chemical components 80 of which contain cannabinoid components and 200 non-cannabinoids components. For medical purposes, cannabinoid substances such as THC (Delta-9-tertrahydrocannabinol), CBD (cannabidiol) and non-cannabinoid substances such as terpenoids and flavonoids are relevant.