Pilot data merit more research
In an interview, corresponding author Prokopios Magiatis, PhD, noted that CLL is “the most commonly diagnosed adult leukemia in Western countries and is responsible for about one in four cases of all leukemias.” CLL remains incurable in most patients, and ways to delay disease progression are needed.
“Oleocanthal is the active ingredient of early harvest olive oil with proven anticancer activities in vitro and in vivo,” Dr. Magiatis explained. “For this reason, it was a unique challenge to investigate the anticancer activity of this compound for the first time in humans through the dietary consumption of specifically selected olive oil.” He expressed surprise at the beneficial effects of high-oleocanthal olive oil, not only to the white blood cells, but also to glucose levels.
“It seems that oleocanthal can activate mechanisms related to the apoptosis of cancer cells, and also mechanisms related to blood glucose regulation without affecting any normal cells of the body,” he said. “All anticancer drugs usually have severe side effects, however the administration of 25 mg of oleocanthal through the dietary consumption of olive oil did not present any harmful effects for at least 6 months of everyday use.
“The addition of naturally produced high-oleocanthal olive oil in the diet of early-stage CLL patients at a dose of three tablespoons per day [40 mL] is a practice that may lower the cancerous white blood cells of the patients without any risk,” said Dr. Magiatis. “High-oleocanthal early-harvest olive oil has been consumed for centuries, and may be the key of longevity of several Mediterranean populations.
“In our study, the number of the white blood cells returned back to the number it was one year before the initiation of the study; this clearly shows that it could be a significant factor for the delay of the progress of the disease,” he said.
The current trial was a pilot study in one hospital with only 22 patients for 6 months, said Dr. Magiatis. “We are currently preparing the expansion of the study to other hospitals and other countries, and we aim to include at least 100 patients for at least 1 year, to validate the already-obtained beneficial results.”
The clinical trial is supported by the nonprofit organization World Olive Center for Health, he added.
The current study received no outside funding. The researchers had no financial conflicts to disclose.