People who take cannabis have a lower blood flow to their brain, research has revealed.

Brain scans have been taken of 1,000 people who use the class-B drug as part of research published in the Journal of Alzheimer’s Disease. The study found that all the participants had issues with the blood flow to their brains with many having low levels in areas like the hippocampus, which is involved in memory.

The study looked at information from a total of 26,268 people in the United States in the 20-year period from 1995 to 2015. Images of their brains were taken by researchers from Amen Clinics while the participants took part in a number of concentrations tests.

Out of those involved in the project, 1,000 used cannabis and their results were compared to healthy people who do not use illegal substances. Each person who took cannabis had lower blood flow in their brain’s right hippocampus than the non-drug users.

Drug could impact on memory

It is thought this could mean that using cannabis interferes with people’s ability to remember things.

Dr Elisabeth Jorandby, one of the report’s authors, said the results were surprising.

She said: “As a physician who routinely sees marijuana users, what struck me was not only the global reduction in blood flow in the marijuana users’ brains, but that the hippocampus was the most affected region due to its role in memory and Alzheimer’s disease. This work suggests that marijuana use has damaging influences in the brain – particularly regions important in memory and learning and known to be affected by Alzheimer’s.”

If you are concerned someone you know may be using cannabis or another illegal substance, you may want to consider ordering a drugs test. AlphaBiolabs offers a home testing kit which can detect the presence of cannabis and a number of other substances in urine within five minutes.

For a detailed picture of someone’s drug use over a period of months, AlphaBiolabs also offers hair strand drug testing.