For the longest time, I couldn’t work out why I constantly felt “off.”

I’d wake up in the middle of the night for no reason. My mind would race even when I was exhausted. My muscles felt tight, I’d crave sugar in the afternoons, and some days I felt anxious even when nothing stressful was happening.

Like many women in their 40s dealing with perimenopause, insulin resistance, and the everyday chaos of family life, I assumed it was just hormones.

But the more I learned, the more one tiny mineral kept showing up again and again…

Magnesium.

While magnesium isn’t a miracle cure, getting enough of it can make a real difference for many people, especially when it comes to sleep, muscle function, and overall wellbeing.

Why Magnesium Deficiency Is So Easy to Miss

Here’s something that surprised me.

Only around 0.3% of your body’s magnesium is actually found in your blood.

The vast majority is stored inside your bones and cells.

That means a standard blood magnesium test doesn’t always reflect your body’s total magnesium stores. If you’ve ever been told your magnesium is “normal” but still experience symptoms that make you wonder, it’s worth discussing with your healthcare provider whether further assessment is appropriate.

Why So Many of Us End Up Low in Magnesium

Modern life isn’t exactly magnesium-friendly.

Several everyday factors may reduce magnesium levels or increase your body’s need for it, including:

Chronic stress
Diets high in sugar
Too much caffeine
Regular alcohol intake
Insulin resistance
Certain digestive issues that affect absorption
Low vitamin D
Some medications

In fact, many commonly prescribed medications can interfere with magnesium levels, which is another reason it’s worth talking to your doctor or pharmacist if you’re concerned.

9 Signs You Might Not Be Getting Enough Magnesium

Everyone experiences magnesium deficiency differently, but these are some commonly reported symptoms associated with low magnesium levels:

1. Feeling anxious for no obvious reason

If your nervous system constantly feels “switched on,” magnesium may play a role. It’s involved in supporting normal nerve function and relaxation.

2. Waking up around 2 or 3 AM

If you regularly wake in the early hours and struggle to get back to sleep, low magnesium is one possible factor among many that can affect sleep quality.

3. Eye twitching

That annoying little eyelid twitch that seems to come from nowhere? Muscle twitches can sometimes occur when magnesium intake is inadequate.

4. Heart pounding after meals

Some people notice palpitations or a racing heartbeat after eating. While there are many possible causes that should be medically evaluated, magnesium supports normal muscle and heart function.

5. Mental exhaustion

Ever feel completely drained after just thinking all day?

Magnesium is involved in hundreds of biochemical reactions in the body, including those related to energy production.

6. Muscle tightness or unexplained tension

Magnesium helps muscles relax after they contract. Without enough, your body can feel stiff and tight.

7. Constant sugar cravings

This one really surprised me.

When I was craving chocolate every afternoon, I thought it was just a lack of willpower. While cravings have many causes, some people notice improvements when their magnesium intake is optimized.

8. Wired but exhausted

You’re exhausted…

…but your brain refuses to switch off.

Sound familiar?

9. Feeling heavy and sluggish

Low energy, aching muscles, and feeling like your body is moving through mud can have many causes, and inadequate magnesium intake may be one contributing factor.

Some people with low magnesium also experience restless legs, especially in the evening.

Not All Magnesium Supplements Are Equal

This was another lesson I learned the hard way.

I grabbed the cheapest magnesium supplement at the supermarket, took it faithfully…

…and spent more time running to the bathroom than actually feeling better.

Magnesium Oxide

This is one of the most common forms you’ll find on store shelves.

Unfortunately, it’s absorbed relatively poorly compared with other forms and is more likely to cause digestive upset in some people.

Magnesium Glycinate

This has become my personal favorite.

Magnesium glycinate combines magnesium with the amino acid glycine and is generally well absorbed. Many people prefer it in the evening because they find it gentle on the stomach and associate it with helping them wind down before bed.

When Should You Take Magnesium?

Many people choose to take magnesium later in the day or before bed.

If you’re taking higher amounts, it’s often recommended to divide the dose rather than taking it all at once. Always follow the dosage instructions on the product label and speak with your healthcare provider about what’s appropriate for you, especially if you have kidney disease or take prescription medications.

Foods Rich in Magnesium

While supplements can be useful for some people, I always try to focus on food first.

Some magnesium-rich foods include:

Pumpkin seeds
Almonds
Spinach
Dark leafy greens
Avocados
Dark chocolate (the good excuse we all needed!)
Cashews
Black beans

My Take

Learning about magnesium completely changed how I looked at my health.

No, it wasn’t the only thing that helped me. Healing has been about improving my diet, managing insulin resistance, prioritizing sleep, moving my body with Pilates and yoga, and reducing stress where I can.

But magnesium became one small piece of the puzzle that I wish I’d understood years earlier.

If you’re constantly feeling exhausted, anxious, waking during the night, or dealing with stubborn muscle tension, it might be worth chatting with your healthcare provider about whether you’re getting enough magnesium.

Sometimes the smallest nutrients can make the biggest difference.

Have you tried magnesium? I’d love to hear what your experience has been in the comments.

Disclaimer: This article is for educational purposes only and isn’t medical advice. Symptoms such as chest tightness, heart palpitations, severe anxiety, or persistent fatigue can have many causes and should be assessed by a qualified healthcare professional.

magnesium glycinate supplements, magnesium-rich foods, bedtime wellness” collection (herbal tea, sleep mask, red light lamp.