Restless Legs Syndrome UK: The 2026 Evidence Guide to What Actually Helps

Restless legs syndrome, or RLS, is a neurological condition that creates an almost unbearable urge to move your legs, usually in the evening and always worse when you are trying to be still. Around 1 in 20 UK adults live with it, and most have gone years without a proper name for what they are feeling.

Two things have changed the guidance in the last few years. First, sleep specialists now agree the single most useful test in your GP appointment is a ferritin blood test, not a scan. Second, the drugs that used to be first-line, the dopamine agonists, are increasingly held back for later use because of a well-known problem called augmentation.

This UK guide walks through the four diagnostic criteria the NHS uses, why iron matters more than magnesium for RLS specifically, which supplements have real trial data, and when a GP conversation is the fastest route to relief.

Made in the UK · GMP certified

Magnesium Glycinate with Vitamin B6

60 vegan capsules · 1-month supply

• 300mg magnesium bisglycinate per daily serving, chelated for gentle absorption
• Added 5mg B6 to support normal nervous system function
• The bedtime magnesium form most often recommended by UK sleep clinicians

£9.95 £0.33 per day

Add to Cart

Vegan · 30-day returns · Free UK shipping

What Restless Legs Syndrome Actually Is

Restless legs syndrome, sometimes still called Willis-Ekbom disease, is a sensorimotor disorder of the nervous system. The urge to move is real and specific, and the sensations that go with it are usually described as crawling, tugging, itching, or a deep aching restlessness that sits inside the calf muscles rather than on the skin.

RLS is not a circulation problem or a muscle problem, even though it can feel like both. Neurologists think of it as a brain iron and dopamine story, with genetics loading the gun and stress, pregnancy, kidney disease or medication side effects pulling the trigger.

Around 1 in 20 UK adults meet the diagnostic criteria at some point, and roughly a third of those have symptoms bad enough that it is worth treating. Women are affected roughly twice as often as men, and pregnancy is a well-recognised trigger that usually resolves after birth.

The Four URGE Criteria the NHS Uses

Because RLS is a clinical diagnosis with no blood test that confirms it, the International Restless Legs Syndrome Study Group set out four essential criteria in 2014, and NHS GPs use these exact four questions to make the call. All four must be true.

Your GP will also want to rule out mimics, particularly peripheral neuropathy, night-time leg cramps, akathisia from certain antidepressants, and positional discomfort. That is why a proper diagnosis usually involves a medication review as well as a blood test.

Why Ferritin Matters More Than Magnesium for RLS

The single most useful test in an RLS work-up is serum ferritin, the marker of your body's iron stores. Even people with a normal full blood count can have low ferritin, and iron shortage in the brain is central to why RLS symptoms happen.

UK sleep clinicians target a ferritin level above 75 micrograms per litre for anyone with restless legs, higher than the standard "normal" range most labs use. If yours is below that number, correcting it can meaningfully reduce or even eliminate symptoms, and a 2019 Cochrane review confirmed iron therapy improves RLS in adults with low iron stores (Trotti et al., 2019, DOI: 10.1002/14651858.CD007834.pub3).

Because iron supplementation needs a lab result to guide it and can constipate or upset the stomach at the wrong dose, iron for RLS is a GP conversation rather than a shelf pick. That is why we do not push an iron supplement for restless legs on this page.

The Magnesium Role and How Much to Take

Magnesium is not a cure for RLS, but it is the one over-the-counter option with the most consistent anecdotal support and a plausible mechanism. It contributes to normal nerve and muscle function, and a bedtime dose has a calming effect that helps some people through the evening trigger window.

The form matters. Magnesium bisglycinate is the version UK sleep clinicians tend to recommend for restless legs because it is gentle on the stomach at the doses that matter for calming the nervous system in the evening. Magnesium citrate works too but is more likely to loosen the bowel, and oxide is poorly absorbed and largely unhelpful here.

Practical dose for RLS

Most people find 200 to 400mg of elemental magnesium, taken 30 to 60 minutes before bed, is the range worth trying. Two capsules of Supplements Wise Magnesium Glycinate with B6 deliver 300mg of magnesium and 5mg of B6, which sits neatly in that window.

Give it two to four weeks of consistent evening use before deciding whether it is doing anything. Our full magnesium form comparison and the best time to take magnesium guide break the choice down further.

B12 and the Neuropathy Overlap

Peripheral neuropathy from low vitamin B12 can mimic restless legs quite closely, and the two frequently coexist in vegetarians, vegans, adults over 60, people on metformin, and anyone on long-term stomach acid-blocking medication. Correcting a genuine B12 deficiency will not fix classic RLS on its own, but it removes a common confuser.

If your legs feel numb, pins-and-needles-y, or sensitive to light touch in addition to the evening urge to move, ask for a B12 test alongside the ferritin. The methylcobalamin form of B12 is the pre-activated one your body uses directly, and it is a sensible choice while you wait for the blood-test result.

Made in the UK · GMP certified

Vitamin B12 1mg Methylcobalamin

120 vegan capsules · 4-month supply

• 1000mcg pre-activated methylcobalamin, the form the body uses directly
• Supports normal nervous system and energy metabolism
• Useful for vegans, over 60s, and long-term metformin or PPI users

£9.95 £0.08 per day

Add to Cart

Vegan · 30-day returns · Free UK shipping

For a fuller symptom picture, our signs of B12 deficiency guide lists the eight symptoms UK GPs listen for.

Prescription Medications and Why the Guidelines Changed

For a long time, GPs and neurologists reached first for a class of drug called dopamine agonists, medications like pramipexole, ropinirole and rotigotine. They work quickly, and for many people they were transformative in the short term.

The problem is a phenomenon called augmentation. After months or years of daily use, symptoms often creep earlier into the day, become more intense, and start affecting the arms as well as the legs. In effect, the medication that was helping quietly starts to make the underlying condition worse.

Because of this, the 2021 Mayo Clinic Proceedings guidance and the American Academy of Sleep Medicine now recommend alpha-2-delta ligands like gabapentin enacarbil or pregabalin as first-line pharmacology for most adults with troublesome RLS, and hold dopamine agonists in reserve (Silber et al., 2021, DOI: 10.1016/j.mayocp.2020.12.026). UK specialists broadly follow the same shift.

Everyday Triggers to Cut Back On

A lot of the improvement people notice from working with an RLS clinic is not from a prescription pad, it is from spotting and removing everyday triggers that quietly amplify symptoms.

• Caffeine after midday. The half-life is long enough that a 3pm coffee is still in your system at 10pm.
• Evening alcohol. Fragments sleep architecture and is a well-documented RLS trigger.
• Certain antidepressants. SSRIs, SNRIs, mirtazapine and tricyclics can worsen RLS. Never stop these without a GP conversation, but flag it.
• Sedating antihistamines. Older night-time cold medicines and travel-sickness tablets containing promethazine or diphenhydramine can flare RLS.
• Cigarettes. Nicotine is a stimulant and disrupts the same evening window.

Blood-donation history and heavy periods are also relevant, because both deplete iron stores over time. If either applies to you, that is worth mentioning at the ferritin appointment.

Supplements Worth Trying, and Three to Skip

If iron is corrected and prescriptions are not yet needed, three supplements have enough of a signal to be worth a properly consistent trial.

The other side of the ledger is honest too. Three options that get promoted online for RLS do not really earn a place in a UK routine.

• Quinine tablets or tonic water. Old-school GP advice, but MHRA and NHS explicitly advise against quinine for RLS because of serious heart-rhythm risk.
• CBD oil. Popular online, but there is no meaningful randomised evidence for RLS specifically as of 2026.
• Melatonin for the restlessness itself. May help sleep onset but does nothing for the sensory urge to move, and some studies suggest it can even prolong it.

Sleep Hygiene That Actually Moves the Needle

Because RLS makes the evening the hardest part of the day, small changes to how the last two hours before bed are structured tend to have an outsized effect.

Aim for a consistent bedtime, ideally within a 30-minute window every night. Warm baths and progressive muscle relaxation both help, in part because they mimic the movement that quiets the urge and in part because they draw blood into the calves.

A gentle 15 to 20 minute walk after dinner is one of the highest-yield interventions on this whole list. It gives your legs the movement they are asking for at exactly the trigger window, without ramping up cortisol the way a late gym session would. Our sleep supplements guide and the muscle cramps guide both cover adjacent evening routines you can layer on.

When to See Your GP

Book a GP appointment about restless legs if symptoms happen most nights, if they are affecting your sleep, or if a partner has noticed you kicking or jerking in your sleep. Ask specifically for a ferritin, full blood count, B12, and vitamin D panel, plus a review of any medications that might be contributing.

Seek urgent GP attention if the sensations spread to the arms and torso within weeks, if there is any weakness in the legs, or if symptoms started suddenly during pregnancy, kidney disease or after a new medication. See NHS Inform's restless legs syndrome page and the charity RLS-UK for peer support and further reading.

Frequently Asked Questions