A new study by Daniel G. Amen, a celebrity doctor, best-selling author and founder of Amen Clinics, has found that marijuana use and alcohol consumption accelerates brain aging by 0.6 years and 2.8 years respectively.
The study, which is thought to be the largest brain imaging study ever conducted, involved the analysis of no less than 62,454 SPECT (single photon emission computed tomography) scans taken from more than 30,000 people. The people scanned were aged between nine months and 105 years.

Its aim was to determine the factors that contribute most to the brain again. One of the findings in addition to the effects of alcohol and marijuana use that the study made was that brain disorders such as schizophrenia, ADD and bipolar disorder contribute significantly to brain deterioration.
Dr. Amen stated his belief that his findings on cannabis were particularly significant when put in the context of the global push to legalize the substance. He also added that it doesn’t appear to be as safe as the movement for it to be viewed as a harmless way to unwind would have you believe.

“Based on one of the largest brain imaging studies ever done, we can now track common disorders and behaviors that prematurely age the brain. Better treatment of these disorders can slow or even halt the process of brain aging. The cannabis abuse finding was especially important, as our culture is starting to see marijuana as an innocuous substance. This study should give us pause about it,” he added.
In the US alone, some eight states have legalized marijuana for recreational use, namely Washington, Oregon, California, Colorado, Nevada, Alaska, Maine, and Massachusetts, while a further 22 states have laws that allow for marijuana use by providing limited access to it under certain conditions.

A recent Gallup poll found that some 64% of Americans support the legalization of marijuana for recreational use, numbers that have never been seen before. The reason for this is believed to be the huge amount of researching pointing to marijuana being one of the least harmful drugs available. With that being said, this study appears to show that its effects on the brain might be more severe than previously thought.
BONUS - Listen to Dr. Amen speak about brain aging in his own words:
Images by Deposit Photos.
Can Probiotics Improve Mental Health? Research Says YES
Studies repeatedly show that probiotics can be a potentially effective treatment for several mental health issues. This is what is currently known on the topic.
Study Finds a Painless Way to Monitor Blood Sugar Levels
A new study found that continuous glucose monitors improve blood sugar control and quality of life in diabetes patients - pain-free.
Did You Know You're Intelligent If You Have These Traits?
There are certain signs of intelligence that are actually quite subtle. Here are 10 subtle signs that are hallmarks of intelligence.
Depression Can Be Eased By Taking a Hot Bath, Study Finds
A small study conducted at the University of Freiburg has found that taking a daily bath might be good for depression. Read more about the study here.
How Drinking Too Little Alcohol May Also Cause Dementia
A new study shows that drinking too much or too little alcohol can affect your chances of getting dementia. Read all about it here.
Forget Apples! It's an Egg a Day That Keeps the Doc Away...
According to new research, it could actually be an egg a day that keeps the doctor away.Find out more here!
The Viral Egg Poaching Hack That Actually Works
Poached eggs have a reputation for being tricky. The swirling water, the wispy whites floating everywhere, the timing - it's enough to put anyone off. But a simple trick that's been making the rounds online might just change all of that.
Uncover the Secrets of the Universe in These Documentaries
This list of riveting space documentaries will help you unlock the mysteries of the universe and beyond.
Meta Unveils New Glasses that May Change Sports Forever
META has revealed a new line of AI-powered smart glasses: Oakley Meta HSTN
New Study: Dopamine Does Way More Than We Thought!
How the brain's reward system physically rewires the motor cortex during skill learning — and what happens when that reward signal gets cut off.
4:26
Despite Looking Similar, Cats Are MORE Diverse Than Dogs!
Who's more diverse, cats or dogs? This video answers this question once and for all, the it might surprise you...
These Optical Illusions Will Shock Your Mind!
Optical illusions create miscommunication between our eyes and brain making, us see things that are not really there or not see things that are right in front of us. See for yourself.
3:07
The Speed of Light Visualized in a Magnificent Video
Have you got the patience? Watch, in scale, just how long it takes light to travel from Earth to Mars
1:08
Boston Dynamics New Robot Can Move Almost Like a Human
Watch the latest in robotics in this video.
2:06
Can Your Brain Get to Grips with These Weird Illusions?
I could have sworn what I was seeing in this video was real! But it wasn't. It was all just an illusion.
Space Looks Breathtaking in These Amazing Photographs
There are some absolutely stunning photographs of space out there today, You won't believe how incredible it is!
New Research Shows Eating Sweets Won't Make You Crave More
A groundbreaking new study challenges conventional wisdom, suggesting our preference for sweet tastes may be more stable than we think.
5:41
Witness the Leading New Electronic Devices of 2026
The experts at CNET and PCMag were on the floor, and they've got their favorites. Let's dive in.
Alzheimer's: What Recent Breakthroughs Have Taught Us
Now, you can discover 4 new studies that show how to do this in ways you haven’t heard of.
19:27
20 of the Most Infamous Tech Product Flops In History
Here's a look at some of the most infamous and biggest technology failures in recent history.
14 Times Nature Inspired Groundbreaking Technology
Let’s explore 14 remarkable examples of how nature has shaped modern technology.
11:02
Ever Wonder What Ancient Egyptian Sounded Like?
Researchers have used all the information we know to create what they think it may have sounded like.
Will We Ever Solve Our Universe's Most Complex Mysteries?
Here are 8 of the biggest unsolved mysteries from the world of physics.
5 Puzzling Mysteries That Science Finally Managed to Solve
These weird occurrences have puzzled humanity for decades, if not centuries. Finally, scientists solved them & the solutions are exciting...
9:13
Want to Travel Quickly Through Space? Try Using a Wormhole
If you want to know what a wormhole is and how it is supposed to work, then you've come to the right place!
13:41
The 5 Most Important Fossil Discoveries from Last Year
2024 saw some really amazing fossil discoveries!
There are Some Great Secrets Found in Mathematics...
Numbers hold some great secrets - they even tell us about life!
6:25
Do You Like the Smell of Rain? This Is Why
One of the best things about rain and thunderstorms is that clean fresh smell afterward. But what actually causes that distinct scent?
Chronically Late? What Science Has to Say About You
There are 8 positive things that science says about late people that we all need to know.
58:37
Science: Here's Everything We Know About Pluto
Join us as we unravel the mysteries of far off Pluto, 3.7 billion miles from our Sun.
5:06
The Only Manmade Object That Will Last Forever
This copper discus contains 116 images we launched into space for aliens to see
4:51
Watch These Chinese Robots Amaze the World
In this video, you're going to see just how far these robots can go, as they've been programmed with some truly amazing dance moves,
8 Important Inventions That Were a Complete Accident
It might be interesting for you to learn that some very important scientific innovations were born as a result of an accident.
5:39
Why Are Your Ears Ringing? The Causes Explained
Nearly 15% of the human population worldwide are plagued by this strange sensation, but most people don't know the causes behind ringing in the ears...
10:11
10 Smart Home Gadgets You Didn’t Know You Needed
If you’ve ever wanted a smarter, more efficient home, these 10 gadgets might be exactly what you need.
The Most Remarkable Medical Breakthroughs of 2024
Here’s a look at some breakthroughs in medical innovation this year.
4:57
Mjøstårnet - The World’s First Wooden Skyscraper
Mjøstårnet is an 18 story tall skyscraper towering over the Norwegian countryside. What makes it so special is that it's made entirely out of wood...
9 of the Greatest Unsolved Mysteries About the Universe!
The universe has been around for close to 14 billion years, but it still holds many mysteries that continue to perplex scientists. Here's 9 of them!
12:34
The World You See Doesn't Really Exist...
his video reveals how your brain constructs reality instead of simply perceiving it.
These Are the Miracles That Happen in Our Bodies Every Day
There is a lot that happens inside our bodies every single day. Did you know any of these facts?
25 Pics Showing How People in the Past Imagined the Future
Let’s see how the people of the past imagined the future and find out if their fun predictions came true with these 25 vintage pictures
This New Blood Pressure Drug Could Be a Game-Changer
Zilebesiran, an investigational drug that is showing profound success in late-stage clinical trials is offering hope for millions who struggle to keep their blood pressure in check.
8:48
Fascinating: What Around Us is Invisible?
The Invisible Things that Turn the World...
5:28
Just How Small is an Atom? - Fascinating!
Just how small are atoms? And what's inside them? The answers turn out to be astounding...
Has Modern Technology Changed Our Cognitive Abilities?
Modern digital technology is everywhere and it’s changing how we think, how we behave and even how we feel about things.
9:03
24 Unbelievable Abilities Your Body Has
The human body is a complex and endlessly fascinating machine, and it might be even more sophisticated than you know...
21:25
How Every Nuclear Power Got Its Atomics
This video will explain how each nation earned the complex and controversial title of nuclear power.
Earth Is So Incredible: I Was Stunned by These 50 Facts
Here's a post that will explain to you just what's truly, scientifically amazing about our planet Earth. I'm gobsmacked.
To enable your Ad-Free Subscription, please fill the fields below
Your subscription was successful, now you can enjoy an ad-free experience!! Note: To make sure you get no ads, please make sure to log in to your account. If you are logged in already, then refresh the page. The subscription can be cancelled at any time.