Tuesday Tip: Magnesium and sleep

Tuesday Tip: Magnesium and sleep

There’s been lots of talk about the benefits of magnesium for improving sleep quality so what’s the evidence actually like?

Magnesium increases our gamma-aminobutyric acid (GABA) levels by binding to GABA receptors in the brain. GABA is the neurotransmitter responsible for quieting down nerve activity. When GABA levels are low, the brain feels like it is constantly switched on, which makes it very difficult to relax and can lead to increased stress and anxiety which can lead to poor sleep. Magnesium, in theory, helps you “wind down” and prepare for sleep.

Studies have shown a possible association between low magnesium and poor sleep but there are few studies actually testing the impact of increasing magnesium. Studies on insomnia found that on average people got to sleep 17.36 minutes quicker and had an increase in total sleep time of 16.06 minutes with increased magnesium intake. In terms of general sleep the results are less clear but they did find an association between higher magnesium intake and better sleep for those with very poor sleep but there wasn’t anything suggest that magnesium supplements help sleep in the average person. There is a lot of anecdotal evidence from people measuring their sleep who have found some level of improvement with magnetism supplements but these aren’t proper studies so need to be taken with a pinch of salt.

The standard recommendation is 300-400mg ~1hr before bed. You can get magnesium from dark leafy greens, nut, seeds, fish, bananas, oats and tofu etc. I’m a fan of a food-first approach but there may be a case for taking a supplement too. Most people don’t get enough magnesium from their diet and it may not be realistic to get it from food, in addition there is evidence that the acute dose of magnesium matters i.e. getting 300-400mg in one hit – hard to do from food alone. There are plenty of options of supplements but magnesium glycinate is recommended.

So in summary, whilst the evidence isn’t conclusive it could be worth increasing magnesium intake if you struggle with sleep as it’s relatively cheap and safe when used in appropriate amounts.

Happy Tuesday 🤗xx