Magnesium: causes and symptoms of a magnesium deficiency

If you’re someone who keeps an eye on your health and wellbeing, you’ve probably heard about magnesium - but do you know how important it really is? Magnesium plays a crucial role in hundreds of processes in the body, yet magnesium deficiency is more common than many people realise. Because the symptoms can be subtle, low magnesium levels often go unnoticed. In this blog, we’ll explain what magnesium does, the causes of magnesium deficiency, how to recognise the signs, and what you can do to support healthy levels.

Table of Contents

• What is magnesium?

• Recognising the symptoms of magnesium deficiency

• Causes of low magnesium levels

• How to address and prevent a magnesium deficiency

• Taking control of your magnesium levels

• Frequently asked questions about magnesium deficiency

What is magnesium?

Magnesium is an essential mineral that your body needs to function properly. It supports over 300 biochemical reactions and plays a key role in:

• Muscle function and relaxation

• Nerve health

• Energy production

• Heart rhythm regulation

• Bone strength

Without enough magnesium, your muscles may struggle to relax properly, your nervous system can become overstimulated, and your energy levels may drop. In short, magnesium helps your body stay balanced and resilient (NIH, 2026). 

Recognising the symptoms of magnesium deficiency

Magnesium deficiency can show up in different ways. Some symptoms are mild at first, which makes them easy to overlook.

The most common symptoms of magnesium deficiency include:

• Muscle cramps or twitching

• Fatigue or low energy

• Sleep disturbances

• Headaches

• Restlessness or irritability

• Tingling sensations

• Difficulty concentrating

Yes - a magnesium deficiency can affect both your energy levels and your sleep. Magnesium helps regulate melatonin and supports muscle relaxation, both of which are essential for quality rest.

If you regularly experience several of these symptoms, it may be worth checking your magnesium levels (MedlinePlus, 2025).

Causes of low magnesium levels

There are several possible causes of magnesium deficiency.

1. Dietary factors

Modern diets often lack magnesium-rich foods such as leafy greens, nuts, seeds, and whole grains.

2. Stress

Chronic stress increases magnesium usage in the body, which can gradually lower levels.

3. Medical conditions

Digestive disorders such as Crohn’s disease or coeliac disease may impair magnesium absorption.

4. Medications

Certain medications - including diuretics, antibiotics, and proton pump inhibitors - can reduce magnesium levels.

5. Lifestyle habits

High caffeine or alcohol intake may increase magnesium loss.

Higher-risk groups include:

• Athletes

• Older adults

• People with digestive conditions

• Individuals with high stress levels

Sources: Cleveland Clinic, 2022; NIH, 2026

How to address and prevent a magnesium deficiency

If you suspect a magnesium tekort, there are safe ways to improve your intake.

Focus on magnesium-rich foods:

• Spinach and kale

• Almonds and cashews

• Pumpkin seeds

• Avocados

• Dark chocolate

• Whole grains

Supplements

Magnesium supplements can help - but should be taken carefully. Too much magnesium may cause digestive discomfort.

Always consult a healthcare professional before starting supplements, especially if you take medication.

Sources: GesundBund, 2022

Taking control of your magnesium levels

Being aware of the symptoms and causes of magnesium deficiency is an important step toward better health. If you recognise potential signs, testing your levels can provide clarity.

With at-home health testing from Homed-IQ, you can gain insight into your magnesium status from the comfort of your own home - empowering you to take proactive steps toward balance, better sleep, and sustained energy.

Monitoring your health doesn’t have to be complicated - it starts with awareness.

Frequently asked questions about magnesium deficiency

How can I test my magnesium levels at home?

You can check your magnesium levels using an at-home blood test, such as those provided by Homed-IQ. These tests typically involve a simple finger-prick sample that you send to a certified lab. Once analysed, you receive clear results and insights into whether your magnesium levels are within a healthy range.

Can lifestyle changes alone correct a magnesium deficiency?

In mild cases, yes. Improving your diet and reducing stress may be enough to restore healthy levels. However, if the deficiency is caused by medical conditions, medications, or long-term depletion, supplements or professional guidance may be necessary.

Testing can help determine the most appropriate approach.