What are the best vitamins for the Restless Legs Syndrome?
Restless legs iron defficiency
Iron is considered the single most important metabolic factor in the Restless Legs Syndrome (RLS). It is not just about having enough iron in the blood; it is about how much iron actually reaches the brain. Even if a person is not clinically anaemic, low-to-normal iron levels can trigger RLS symptoms in the brain. If your ferritin is below 75µg/L, iron supplementation (oral or IV) may resolve the RLS symptoms without the need for lifelong medication. Oral Iron is often prescribed with Vitamin C to increase absorption. Intravenous (IV) iron is used if oral iron is not tolerated or if ferritin levels remain low despite oral supplementation.
Iron is a critical cofactor for an enzyme called tyrosine hydroxylase, which the brain needs to produce dopamine. If the brain doesn’t have enough iron, dopamine signalling becomes unstable. This leads to the "urge to move" and the involuntary "creepy crawling" sensations that define the condition.
Hepcidin is a hormone that regulates iron absorption. Its levels naturally rise in the evening and at night. When hepcidin is high (evening), it blocks iron from entering the bloodstream. This may be one reason why RLS symptoms typically peak at night. The brain is essentially "starved" of a fresh iron supply right when it needs it most.
Consult a doctor for a ferritin test before starting iron supplements. Too much iron can be harmful.
Does Magnesium help restless legs?
Magnesium is one "natural" remedy suggested for RLS. While many people report significant relief, the scientific evidence supporting its use is more anecdotal than clinical. Magnesium is a mineral that plays a role in neuromuscular transmission and muscle relaxation. Most medical reviews suggest that magnesium is likely only effective for RLS if you already have a magnesium deficiency.
Magnesium Glycinate (magnesium bound with glycine, an amino acid) tablets are widely considered the best option for RLS and sleep related issues and it’s less likely to cause a laxative effect.
Magnesium Citrate is very common and generally more affordable than magnesium glycinate. It is absorbed better than cheaper forms like magnesium oxide. It can have a mild laxative effect. If you have a sensitive stomach, this might cause digestive upset before you reach a high enough dose to help your legs.
When comparing magnesium products, keep elemental magnesium in your mind. Check the back label for the "elemental" amount. For example, a 1,000mg tablet of magnesium glycinate might only contain 100mg of actual elemental magnesium. Most RLS guidelines suggest starting with 200mg to 400mg of elemental magnesium. Some tablets include Vitamin B6 (often as P5P), which can assist in transporting magnesium into the cells. In your pharmacy look for "High Strength" or "Night" formulas. Specifically choose those labelled as "Magnesium Glycinate" or "Bisglycinate" rather than generic "Magnesium."
If you are also taking iron supplements for your RLS, do not take them at the same time as your magnesium. Magnesium can interfere with iron absorption. It is often recommended to take iron in the morning (with Vitamin C) and magnesium in the evening.
Dissolving magnesium sulfate (Epsom salts) in a warm bath before bed is a popular remedy. The warmth of the water combined with the magnesium may help soothe the legs.
Some RLS sufferers apply magnesium oil directly to their calves. While scientific proof that magnesium is absorbed through the skin is limited, many find the massage and cooling sensation helpful for "overriding" the RLS crawling feeling.
Should I take Vitamin B12 for restless legs syndrome (RLS)?
While RLS is linked to iron deficiency, research indicates that Vitamin B12 may also play a substantive role in nerve health and can be a contributing factor to the condition.
Vitamin B12 is essential for maintaining the myelin sheath, which is the protective coating around nerves. When B12 levels are low, nerve signals can misfire or "leak," leading to the characteristic crawling, tingling, or burning sensations associated with RLS. A B12 deficiency can cause peripheral neuropathy (damage to the nerves in the feet and/or hands), which often presents symptoms identical to RLS. In some cases, RLS may even be the first and only sign of a B12 deficiency.
B12 is involved in the metabolic processes that produce dopamine. Since RLS is believed to be caused by an imbalance of brain dopamine a deficiency in B12 potentially lead to RLS symptoms.
Because B12 and iron studies provide different pieces of the puzzle, they are often tested together when investigating RLS. Correcting a B12 deficiency has been shown in clinical case studies to significantly reduce or even resolve RLS symptoms, particularly in patients who do not respond to standard RLS medications like dopamine agonists.
What does Vitamin D do for the Restless Legs Syndrome (RLS)?
Recent clinical research has highlighted a significant link between Vitamin D levels and the severity of RLS. Several studies have shown that patients with RLS often have significantly lower serum Vitamin D levels. Furthermore, some clinical trials have demonstrated that Vitamin D supplementation can lead to a decrease in the RLS severity scale scores. While iron remains the most studied factor, Vitamin D is increasingly recognized as a key player in neurological health.
Vitamin D is involved in the development and function of neurons that produce dopamine. Since RLS is primarily understood as a dysfunction in the brain's dopamine pathways, a Vitamin D deficiency may impair the brain's ability to regulate muscle movement.
Vitamin D serves as a "neuroprotector" helping to shield dopaminergic neurons from damage or oxidative stress. Chronic inflammation is often linked to RLS. Vitamin D has anti-inflammatory properties that may help calm the systemic irritation that can exacerbate leg sensations.
In many cases, Vitamin D deficiency and iron deficiency (ferritin) occur simultaneously. However, even when iron levels are normal, low Vitamin D may independently trigger or worsen RLS symptoms.
Should I take Vitamin C for the Restless Legs Syndrome (RLS)?
Vitamin C (ascorbic acid) is rarely the primary focus in managing RLS. However, it acts as a critical "supporting actor" primarily through its relationship with iron, dopamine and its role in the brain.
The most significant link between Vitamin C and RLS is its ability to enhance the absorption of non-heme iron (the type of iron found in plants and supplements). Vitamin C helps convert iron into a chemical form that is more easily absorbed by the small intestine. Doctors almost universally recommend taking oral iron supplements alongside 100mg to 250mg of Vitamin C (or a glass of orange juice) on an empty stomach to maximize the amount of iron that actually reaches the bloodstream and, ultimately, the brain.
Since iron deficiency is one of the leading metabolic cause of RLS, taking an iron supplement without Vitamin C can significantly reduce its effectiveness. Taking Vitamin C and iron supplements together can help raise ferritin levels more quickly.
Should I take Folate for restless legs syndrome
The evidence for Folate (vitamin B9) contribution to the Restless Legs Syndrome (RLS) in more anecdotal than clinical. There are no double blind, randomised, placebo controlled trials on folate. What research there is suggests a potential link between folate deficiency and RLS.
Folate is critical for proper nerve impulse conduction and muscle contraction. Some research suggests folate may also play a role in the production of dopamine, a neurotransmitter that helps regulate muscle movement and is often implicated in RLS.
The association between low folate levels and RLS is particularly noted in pregnant women. Pregnancy is a period where both RLS risk and nutritional demands increase, and some studies have found that folic acid supplementation may help improve symptoms in this group.
RLS is a complex condition. Before starting folic acid supplementation, it is important to speak with your doctor. They can perform blood tests to determine if you actually have a deficiency or if your RLS is related to other causes, such as iron levels, kidney issues, or other underlying conditions.
Because RLS is often multifactorial, doctors typically look at a range of factors, including iron stores (ferritin), magnesium, current medications and lifestyle factors like caffeine and alcohol intake, which are also known to impact symptoms. Folate may be low on the list of risk factors for RLS.
Last reviewed 20/07/2026