Why Magnesium Matters: Benefits, Functions, and Health

Key Takeaways

• Magnesium is an essential mineral involved in numerous functions throughout the body.

• It supports normal muscle and nerve function, energy production, and bone health.

• Magnesium is found in foods such as nuts, seeds, legumes, whole grains, and leafy green vegetables.

• Getting enough magnesium through a balanced diet is important for overall health.

• Magnesium supplements may be useful for some people when dietary intake is insufficient.

Magnesium is an essential mineral that supports hundreds of processes throughout the body, including energy production, muscle and nerve function, bone health, and blood glucose regulation. Getting enough magnesium is therefore important for maintaining normal body function and overall health.

Despite its importance, some people may not get enough magnesium from their diet. Understanding the benefits of magnesium, how much you need, and which foods provide it can help you make informed choices about your nutrition and supplementation.

In this guide, you'll learn:

• Why magnesium is important for the body

• What magnesium does for muscles and nerves

• How magnesium supports energy production

• Its role in bone and cardiovascular health

• Foods that provide magnesium

• How much magnesium adults need

• When a magnesium supplement may be appropriate

What Is Magnesium?

Magnesium is an essential mineral that the body needs to function properly. It is involved in numerous biochemical processes, including energy production, protein synthesis, muscle contraction, nerve signalling, and blood glucose regulation.

The body stores most of its magnesium in the bones and tissues, with a smaller amount circulating in the blood. Because the body does not produce magnesium on its own, it must be obtained through food and, when appropriate, supplements.

Magnesium is naturally found in a variety of foods, particularly nuts, seeds, legumes, whole grains, and leafy green vegetables. A varied and balanced diet can help provide the magnesium needed to support normal body function.

How Does Magnesium Support the Body?

Magnesium plays a role in many essential processes that help the body function normally. Its effects extend across several areas of health, from energy metabolism to muscle and nerve function.

Supports Energy Production

Magnesium is involved in the processes that convert food into energy. It is required for the production and use of ATP, the body's primary energy-carrying molecule.

Adequate magnesium intake therefore helps support normal energy metabolism and cellular function.

Supports Muscle Function

Magnesium contributes to normal muscle contraction and relaxation. It works alongside other electrolytes, including calcium and potassium, to help maintain proper muscle function.

Getting enough magnesium through the diet is therefore important for maintaining normal muscle performance.

Supports Nerve Function

Magnesium is also involved in normal nerve signalling. It helps regulate the movement of minerals across cell membranes and contributes to healthy communication between nerves and muscles.

Supports Bone Health

A significant amount of the body's magnesium is stored in bone. Magnesium contributes to normal bone structure and is involved in processes related to bone formation and mineral metabolism.

Maintaining adequate magnesium intake alongside other nutrients, including calcium and vitamin D, supports overall bone health.

Supports Blood Glucose Regulation

Magnesium is involved in carbohydrate metabolism and contributes to normal blood glucose regulation. Adequate magnesium intake is therefore part of a balanced nutritional approach to metabolic health.

Supports Cardiovascular Function

Magnesium contributes to normal muscle and nerve function, including the normal function of the heart. It also plays a role in maintaining normal electrolyte balance and blood vessel function.

What Foods Are Rich in Magnesium?

One of the best ways to maintain adequate magnesium intake is to include a variety of magnesium-rich foods in your diet. Plant-based foods such as nuts, seeds, legumes, whole grains, and leafy green vegetables are particularly good sources.

Nuts and Seeds

Nuts and seeds can provide substantial amounts of magnesium in relatively small servings. Good options include:

• Pumpkin seeds

• Chia seeds

• Almonds

• Cashews

• Peanuts

Legumes

Beans and other legumes provide magnesium alongside fibre and plant-based protein. Consider including:

• Black beans

• Kidney beans

• Chickpeas

• Lentils

• Soybeans

Whole Grains

Whole grains can contribute to daily magnesium intake while also providing fibre and other nutrients. Examples include:

• Brown rice

• Oats

• Quinoa

• Wholemeal bread

• Wholegrain cereals

Leafy Green Vegetables

Leafy greens contain magnesium because the mineral is part of the chlorophyll molecule found in plants. Useful options include:

• Spinach

• Swiss chard

• Kale

• Collard greens

Other Sources

Magnesium is also found in foods such as:

• Avocado

• Potatoes

• Bananas

• Dark chocolate

• Some dairy products

Eating a varied diet that includes several of these foods can help support adequate magnesium intake without relying solely on supplements.

How Much Magnesium Do You Need?

Magnesium requirements vary by age and sex. For most adults, recommended daily intakes are:

• Women: 310 to 320 mg per day

• Men: 400 to 420 mg per day

• Pregnancy: 350 to 360 mg per day

• Breastfeeding: 310 to 320 mg per day

These amounts include magnesium from both food and supplements.

Most people should aim to meet their magnesium needs through a varied, balanced diet. However, some people may have difficulty getting enough magnesium from food alone due to dietary restrictions, certain health conditions, or other factors.

What Happens If You Don't Get Enough Magnesium?

Inadequate magnesium intake over time can affect normal body function. Early signs of magnesium deficiency may include:

• Loss of appetite

• Nausea

• Fatigue

• Weakness

More severe deficiency can contribute to muscle cramps, abnormal heart rhythms, and changes in calcium or potassium levels.

True magnesium deficiency is uncommon in otherwise healthy people, but the risk can be higher in certain situations. If you are concerned about your magnesium intake or symptoms, speak with a healthcare professional before taking high-dose supplements.

Should You Take a Magnesium Supplement?

For most people, food should be the primary source of magnesium. A balanced diet that includes nuts, seeds, legumes, whole grains, and leafy green vegetables can provide a substantial amount of the mineral.

However, a magnesium supplement may be appropriate when dietary intake is consistently low or when a healthcare professional recommends supplementation.

Magnesium supplements are available in several forms, including:

• Magnesium citrate

• Magnesium glycinate or bisglycinate

• Magnesium oxide

• Magnesium chloride

These forms differ in their absorption, elemental magnesium content, and potential effects on the digestive system. The best choice depends on your individual needs and how well you tolerate the specific form.

For more information about specific magnesium forms, see our guides on magnesium glycinate and Albion® TRAACS® magnesium.

It is also important to check the elemental magnesium amount on the supplement label rather than judging the dose solely by the total weight of the magnesium compound.

Magnesium Supplement Safety

More magnesium is not necessarily better. High amounts of magnesium from supplements can cause digestive side effects, particularly diarrhoea, nausea, and abdominal cramping.

The tolerable upper intake level for magnesium from supplements and medications is 350 mg per day for adults. This limit does not include magnesium naturally found in food.

People with kidney problems should be particularly cautious because the kidneys are responsible for removing excess magnesium from the body.

If you take medications or have an underlying health condition, speak with your healthcare provider or pharmacist before starting a magnesium supplement.

Magnesium and Different Life Stages

Magnesium needs can change throughout life. Children and teenagers have different requirements from adults, while pregnancy and breastfeeding can also affect daily magnesium needs.

Older adults may also be more likely to have inadequate magnesium intake because of changes in dietary habits, appetite, or nutrient absorption.

For this reason, magnesium intake should be considered as part of an individual's overall nutritional needs rather than as a one-size-fits-all recommendation.

Food First, Supplements When Appropriate

Whenever possible, prioritise magnesium-rich whole foods. Nuts, seeds, legumes, whole grains, and leafy green vegetables provide magnesium along with fibre, protein, vitamins, minerals, and other beneficial nutrients.

Supplements can be useful when dietary intake is insufficient or when recommended by a healthcare professional. However, they should complement a balanced diet rather than replace it.

Choosing the appropriate magnesium form and dose can also matter. If you are unsure which magnesium supplement is right for you, speak with a healthcare professional or pharmacist.

Frequently Asked Questions

What does magnesium do for the body?

Magnesium is involved in numerous biochemical processes. It supports normal muscle and nerve function, energy production, bone health, blood glucose regulation, and normal cardiovascular function.

What foods are high in magnesium?

Good sources include pumpkin seeds, chia seeds, almonds, cashews, beans, lentils, oats, quinoa, spinach, and other leafy green vegetables.

How much magnesium do adults need each day?

Adult men generally need 400 to 420 mg per day, while adult women generally need 310 to 320 mg per day. Requirements are higher during pregnancy.

Can you get enough magnesium from food?

Yes. Many people can meet their magnesium needs through a varied diet that includes nuts, seeds, legumes, whole grains, and leafy green vegetables.

What happens if you don't get enough magnesium?

Low magnesium intake may contribute to symptoms such as loss of appetite, nausea, fatigue, and weakness. More severe deficiency can affect muscle and heart function.

What is the best form of magnesium to take?

There is no single best form for everyone. Magnesium citrate, glycinate or bisglycinate, oxide, and chloride differ in absorption and digestive effects. The appropriate form depends on your individual needs and tolerance.

Is magnesium supplementation safe?

Magnesium supplements are generally well tolerated when used appropriately. However, high supplemental intakes can cause diarrhoea, nausea, and abdominal cramping. People with kidney problems should consult a healthcare professional before supplementing.

Final Thoughts

Magnesium is an essential mineral that supports many important functions throughout the body, including energy production, muscle and nerve function, bone health, and blood glucose regulation.

The best way to maintain adequate magnesium intake is through a varied, balanced diet that includes magnesium-rich foods such as nuts, seeds, legumes, whole grains, and leafy green vegetables. For people who may not get enough through their diet, a magnesium supplement may be appropriate when used correctly.

At Just Glow, we believe long-term wellness starts with balanced nutrition and evidence-based supplementation. Explore our carefully selected magnesium formulations to complement a healthy lifestyle and support your nutritional needs.

References

1. National Institutes of Health Office of Dietary Supplements. Magnesium Fact Sheet for Health Professionals.

2. National Institutes of Health Office of Dietary Supplements. Magnesium Fact Sheet for Consumers.

3. Institute of Medicine. Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride