What You Need to Know About Magnesium


Magnesium is a mineral that you’ll often see being touted for its health benefits – whether it’s to do with muscle relaxation, sports performance, sleep cycles or disease prevention, so we’ve put together this article to help clarify the science surrounding magnesium!


Why do you need magnesium?

Every cell in your body contains magnesium, and needs it to function. Some of its main functions include:

  • Muscle contraction and relaxation: This is one of its most well-known roles.
  • Energy production: It is also involved in energy creation by helping to convert the food we eat into energy and it helps to create new proteins.
  • Gene repair & maintenance: it helps create and repair your DNA
  • Protein production: it helps create new proteins from amino acids
  • Bone development: invovled in the regulation of calcium and vitamin D

While further research is still needed, there is some emerging evidence linking magnesium to improving conditions such as PMS symptoms in women, preventing migraines, improving mood in people suffering with depression and improving sleep quality.


How much do you need?

How much magnesium you need varies depending in your age and gender.

Age (years) Boys – mg/day Girls – mg/day
1-3 80 80
4-8 130 130
9-13 240 240
14-18 410 360
19-30 400 310
31+ 420 320


To put this in perspective ¼ cup almonds provides you with around 100mg magnesium.


Could you be deficient?

Many Australians could benefit from boosting magnesium in their diets, as around 1/3rd of Aussies are not getting enough. It is relatively easy to become mildly deficient – too much stress, processed food, alcohol, or certain medications can lower your levels. However, dietary changes or supplements can restore your levels quickly. Here are some signs you may be deficient:

  • Unexplained appetite loss
  • Fatigue
  • Muscle weakness
  • Low energy
  • Unexplained weight loss

More serious signs of magnesium deficiency include convulsions, hyper-irritability and muscle spasms. If you are worried you might be deficient, seek the support of your doctor or Accredited Practising Dietitian.


What foods contain magnesium?

Magnesium is found in a variety of foods. It might surprise you that plant based food sources (e.g.grains, fruits and vegetables) typically have higher levels of compared to meats or dairy foods. Higher fibre foods also tend to contain higher levels. Some good sources include;

  • Seeds e.g. pumpkin, flax, sesame, sunflower
  • Nuts e.g. brazil, cashews, almonds, peanuts
  • Fatty fish e.g. mackerel, salmon, halibut
  • Leafy green vegetables e.g. spinach, collard greens, kale
  • Cooked potato
  • Avocado
  • Bananas
  • Tofu and soy products
  • Tahini
  • Wholegrains e.g. quinoa, buckwheat
  • Dark chocolate


Magnesium supplementation

When it comes to supplementation, we always have a food first approach. And like almost all nutrients, you can receive adequate levels through food alone, as long as you are eating a varied diet. Saying that, if you are deficient, then supplementation has proven effective in restoring levels. Keep in mind that taking magnesium supplementation provides no additional benefits to a person with already adequate levels.

There is a lot of research happening on magnesium and it’s role in various diseases, in sports performance and sleep cycle – but there is currently no strong evidence to suggest supplementing has a significant impact on sports performance.


How to boost magnesium in your diet

  • Add some leafy greens to your smoothies
  • Sprinkle some pumpkin seeds or nuts over your salad
  • Opt for avocado or tahini instead of margarine or butter
  • Swap some of the red meat or chicken in your diet for legumes or fish
  • Choose dark chocolate instead of milk or white
  • Consume more wholegrain foods (e.g. brown rice, oats, quinoa, buckwheat)


To Summarise

Magnesium is an extremely important mineral for the body due to its involvement in hundreds of biochemical processes. An overall balanced diet rich in whole foods should mean that you are meeting your requirements. Although supplements are readily available, they are generally not required unless you are deficient, and if so, should be taken under the supervision of a health care professional.


To learn about the science behind Iron and why it is so important, click here.

To learn more about the government guidelines for magnesium, click here.

This article was co-authored by Anna & Alex and Sarah Young, who is an intern at The Biting Truth who is currently Studying her Masters In Nutrition & Dietetics.



The post What You Need to Know About Magnesium appeared first on The Biting Truth.

Anna & Alex are the dietitians and nutrionists behind 'The Biting Truth'. The Biting Truth promotes individualised healthy eating and focuses on the consumption of readily available, seasonal and affordable ingredients. Anna and Alex believe that all foods form part of a balanced diet - that 'balance' varies from person to person, and their role is to help you get that balance right.

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