You’re tired. It’s finally time to sleep after a day full of obligations. You really need the sleep to manage getting up for the workout before work.
You lie down thinking now the body can rest.
But then it starts.
A crawling, almost electric feeling in the legs. You have to move them. Stretch, tense, change position. It pulls. Sometimes only in one leg, and you think it could at least be the same in both. Then maybe it wouldn’t feel as intense.
But as soon as you lie still, it comes back.
This is often called restless legs. And no, it’s not your imagination. It’s the body signaling that something in the nervous system is out of balance.
If you often get tingling sensations in your legs in the evening, it’s no surprise that your sleep suffers.
Let’s look at what might be behind it.
When dopamine and iron aren’t quite enough
In research on restless legs, dopamine, a neurotransmitter that helps the brain control movements, keeps coming up. When dopamine signals don’t work optimally, the body can feel more restless, especially at rest.
To produce dopamine, the body needs iron. Iron is involved in activating the enzyme that converts the amino acid tyrosine into dopamine. If iron stores are low, this process is less efficient.
And here it gets interesting.
You can have a "normal" blood value but still low iron stores. That’s why ferritin, which measures how much iron you actually have stored, is relevant in this context.
Many women of childbearing age have lower levels than they think. Not dramatically low, but sometimes enough to affect how the body functions.
That doesn't mean iron is the whole solution. But it is a part worth taking seriously.
Magnesium for restless legs – why levels matter
When a muscle contracts, calcium is involved and drives the process. For the muscle to relax, magnesium is needed.
If magnesium is low, muscles can become more irritable and have a harder time relaxing. Small signals can feel bigger than they really are.
Magnesium is also involved in how nerve impulses are sent and in the regulation of GABA, a calming neurotransmitter. It is the same system active when the body shifts from activity to rest in the evening.
If levels are not optimal, the transition to rest can feel more disrupted. And just as you lie down and everything becomes still, it often becomes more noticeable.
Why magnesium glycinate often works better in the evening
Not all forms of magnesium are the same.
Magnesium Glycinate is magnesium bound to the amino acid glycine. Glycine itself has a calming effect on the nervous system and is linked to sleep and recovery.
If your symptoms occur just as you lie down, that's why many choose this form. It is involved in the same signaling system active during the transition between wakefulness and sleep.
You might recognize yourself in:
- Crawling sensations that become more noticeable when you’re about to sleep
- Difficulty settling down even though you’re tired
- A body that feels tired but not relaxed
Magnesium glycinate is also generally gentler on the stomach than, for example, magnesium citrate, making it easier to take in the evening.
Don’t forget B6
Vitamin B6 is needed for the body to produce dopamine and GABA, two neurotransmitters relevant for restless legs.
If iron is low, dopamine production can be affected. But B6 is also needed in the conversion from amino acids to finished neurotransmitters. If one of the building blocks is missing, the process becomes less efficient.
That’s why magnesium is sometimes combined with B6 when symptoms are related to the nervous system.
If you recognize yourself
If the crawling sensations return and disturb your sleep, it might be worth:
Check your iron stores, especially ferritin.
It shows how much iron you actually have stored, not just what your blood levels look like that day.
Review your caffeine intake in the afternoon.
Caffeine affects dopamine and makes the nervous system more active. If your body is already irritable, it can be more noticeable when you lie down and everything goes quiet.
Try magnesium glycinate in the evening.
For example, 200–400 mg elemental magnesium within the recommended daily intake, a few hours before bedtime, and give it a few weeks.
Make sure you get enough B6 and iron.
Iron is found in liver, red meat, and blood pudding but also in legumes and pumpkin seeds. B6 is found in chicken, salmon, potatoes, and bananas. Supplements can be an option if levels are low.
A simple combination can be magnesium glycinate in the evening and, if iron stores are low, iron earlier in the day together with vitamin C for better absorption.
For me, magnesium glycinate and GABA in the evening were enough. When I gave my nervous system better conditions, the crawling sensations calmed down.
Restless legs is incredibly frustrating, I know (and you do too). But it’s also a concrete symptom.
And the great thing about that is when something is concrete, it’s also easier to do something about it.
