Sleeping on your right side is better for brain health, says scientists

Improve brain function & other health problems by sleeping on your right side

Side sleeping improves brain health, sleep & wellness tips
(Image credit: Andrea Piacquadio / Pexels)

The position you sleep in is completely unique to you. While some people like sleeping on their backs, most enjoy sleeping on their side, with various studies reporting that around 50% of UK adults favour side sleeping.

Regardless of the sleep position you choose, there are various pros and cons that come with them, from improved posture and digestion to more aches and pains in the neck and back area. The best and worst postures for sleep (opens in new tab) can have serious impacts on your sleep pattern, and your physical and mental health, so it’s important to make sure you have the best mattress (opens in new tab) and best pillows (opens in new tab) for your sleep position.

If you’re a side sleeper or are finding your current sleep posture uncomfortable, recent scientific research has shown that sleeping on your right side comes with many health benefits, including improved brain health. According to neuroscientist Tara Swart, M.D., pHD. (opens in new tab) who has conducted extensive research surrounding sleep hygiene, she found that the best position for brain health is sleeping on your side (opens in new tab), specifically on the right side of your body.

This is because sleeping on your right side “is more efficient for glymphatic cleansing, where your brain flushes out waste products overnight. Sleeping on your right side has been shown in research to best support this clean-up process.” By sleeping on your right side, you support your brain health and functions while you age. This not only helps make your days more productive but it can help protect you against further health problems down the line.

Tips for side sleepers

(Image credit: Pixabay / Pexels)

What are the benefits of sleeping on your side?

In our 5 tips for side sleepers (opens in new tab), we noted that sleeping on your side can help aid digestion, reduce acid reflux, minimise back pain and combat snoring and sleep apnoea by keeping your airways open. While choosing the right or left side doesn’t make a huge difference about how well or how long you sleep for, they can help you through various ages and stages of your life.

For example, in an article by the New York Post (opens in new tab), sleeping on your right side is said to help lower your risk of developing neurological diseases later in life, like dementia, Alzheimer’s or Parkinson’s. All of this is linked to the side sleeping position helping the brain clear our waste faster than if you were on your back or stomach.

Further to this, the Sleep Foundation (opens in new tab) has reported findings that sleeping on your right is better for your heart and people with heart failure have been encouraged to choose this side over the left, as the latter can cause discomfort.

On the other hand, the left side is also a good position for your health, especially for pregnant women. By sleeping on the left side, this helps improve blood flow to the mother and baby, and it reduces pressure on internal organs by keeping the uterus off the liver.

It’s been proven time and time again that sleeping on your side is the best position for comfort, support and health. For a well rested night’s sleep on your side, see our guide on how to find the best mattress for side sleepers (opens in new tab).

Bethan Girdler-Maslen
Acting Wellness Editor & Deals Writer

As T3's resident Shopping Expert and Deals Writer, Beth covers deals, discount codes, how to save money and seasonal holidays, including Black Friday, Cyber Monday, Amazon Prime Day, Boxing Day and Easter sales. Alongside her primary focus of deals, Beth is currently Acting Wellness Editor, covering all things sleep, yoga, relaxation and general wellbeing.


Having always been passionate about writing, she’s written for websites, newspapers and magazines on a variety of topics, from jewellery and culture, to food and telecoms. You can find her work across numerous sites, including Wedding Ideas Magazine, Health & Wellbeing, The Bristol Post, Fashion & Style Directory and more. In her spare time, Beth enjoys running, reading, baking and attempting DIY craft projects that will probably end in disaster!