Migraine Supplements: A UK Evidence Guide to Preventing Attacks

If you live with migraine in the UK, you have almost certainly seen the same three supplements crop up in every article, forum post and pharmacy leaflet: magnesium, vitamin B2 (riboflavin) and coenzyme Q10. The reason is simple: these three are the only nutritional supplements with genuine clinical trial data behind them for migraine prevention. Most other supplements you will see promoted rely on marketing rather than published trials.

This guide walks through what the evidence actually shows, what UK bodies like The Migraine Trust and BASH (British Association for the Study of Headache) recommend, and how to build a sensible supplement stack alongside (never instead of) proper migraine care from your GP or neurologist.

What Actually Causes Migraines and Why Supplements Can Help

Migraine is not a bad headache. It is a neurological condition affecting roughly 10 million people in the UK, with the brain briefly losing its ability to regulate pain, sensory input and blood flow. Attacks can last anywhere from 4 to 72 hours and often bring nausea, vomiting and extreme sensitivity to light and sound alongside the head pain.

One of the most consistent findings in migraine research is that migraine brains have impaired mitochondrial energy production. Put simply, brain cells struggle to make and use energy efficiently, which lowers the threshold for an attack. Magnesium, riboflavin and CoQ10 all support this same energy pathway, which is why they show up together in almost every serious clinical trial.

Supplements will not cure migraine and they will not replace preventive medication for people who need it. What they can do, in a subset of sufferers, is reduce attack frequency and severity enough to noticeably change day to day life.

What UK Guidelines Say About Supplements for Migraine

The UK guidance picture is more nuanced than a simple yes or no. NICE (the National Institute for Health and Care Excellence) does not routinely recommend supplements as first line migraine prevention, focusing instead on medications like propranolol, topiramate and CGRP monoclonal antibodies.

The Migraine Trust, however, explicitly lists riboflavin, magnesium and CoQ10 as options worth discussing with your GP. BASH (British Association for the Study of Headache) takes a similar view, acknowledging riboflavin at 400mg daily as a potential treatment in its clinical guidelines. The American Academy of Neurology rates magnesium as Level B evidence, meaning "probably effective", which is the highest evidence grade given to any nutritional supplement for migraine.

The gap between NICE and the patient charities is largely a matter of how each body weighs the evidence. NICE demands prescription-grade RCT data, while The Migraine Trust and BASH accept the smaller but consistent nutraceutical trials given that these supplements are cheap, safe and unlikely to cause harm.

Magnesium: The Strongest Single-Supplement Evidence

Magnesium has the most robust clinical backing of any supplement for migraine prevention. Studies have consistently found that people with migraine, particularly menstrual and aura-type migraine, are more likely to have low magnesium levels in blood, saliva and cerebrospinal fluid than people without migraine.

The landmark UK-relevant trial is Peikert 1996, a randomised, double-blind, placebo-controlled study of 81 adults with migraine given 600mg oral magnesium daily for 12 weeks. Attack frequency dropped by 41.6% in the magnesium group compared to just 15.8% in the placebo group, with attack duration and intensity both meaningfully reduced.

What Form and Dose of Magnesium Works for Migraine

Form matters more than most people realise. Magnesium oxide, which is what many cheap supermarket supplements use, has poor absorption and often causes diarrhoea before you reach the migraine-relevant dose. Magnesium bisglycinate, malate and taurate absorb better and are far gentler on the stomach.

The Migraine Trust recommends 400 to 600mg of elemental magnesium daily, which is roughly double the standard NRV of 375mg. Most people cannot hit that dose from a single form without stomach issues, which is why complex formulas that blend two or three well-absorbed forms are the sensible choice for migraine prevention.

Our Triple Magnesium Complex combines bisglycinate, malate and taurate at 375mg elemental magnesium per 3-capsule serving, with 1.4mg of vitamin B6 to support absorption. Most migraine trial dosing sits between one and two servings per day, ramped up over 2 to 3 weeks to reduce any digestive adjustment.

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Riboflavin (Vitamin B2): The 400mg Protocol

Riboflavin is the most surprising supplement on the migraine evidence list because the effective dose is so much higher than typical B-vitamin doses. Standard B-complex products contain 1 to 5mg of riboflavin, but migraine trials use 400mg daily, roughly 300 times the reference nutrient intake.

The Boehnke 2004 open study, run at the Charite hospital in Berlin, gave 400mg riboflavin daily to 23 migraine patients for at least three months and found meaningful reductions in attack frequency and severity. The earlier Schoenen 1998 RCT (also 400mg for 3 months) found a 50% or greater reduction in attack frequency in 59% of patients on riboflavin vs 15% on placebo.

A note that trips a lot of people up on Reddit and TikTok: riboflavin turns your urine bright yellow at these doses. This is completely harmless, is a marker that you are absorbing the supplement, and fades once you reduce the dose. Do not assume something is wrong if this happens.

Coenzyme Q10: The Mitochondrial Angle

CoQ10 (ubiquinone) is the substance your mitochondria use to convert food into ATP, the fuel that powers every brain cell. Migraine brains show reduced mitochondrial efficiency, and levels of CoQ10 tend to be lower in people with migraine than in matched controls, which is the rationale for supplementing it.

The Sandor 2005 RCT is the classic trial: 42 migraine patients received 100mg CoQ10 three times daily (300mg total) or placebo for 3 months. Attack frequency dropped by 50% or more in 47.6% of the CoQ10 group vs 14.4% on placebo, with the effect starting around week 5 to 7. A 2021 review of six studies covering 371 people confirmed the frequency and duration benefit but noted CoQ10 did not reduce attack severity.

Our Co-Enzyme Q10 300mg with Vitamin B1 delivers the full trial-relevant dose in a single daily capsule, sparing the three-times-a-day dosing of the original Sandor protocol. The added B1 (thiamine) supports the same mitochondrial pathway CoQ10 works on, which is a small but sensible piece of formulation for people building a migraine stack.

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What About Combination Supplements (Mg + B2 + CoQ10)

Because all three supplements work on the same mitochondrial pathway, the natural next question is whether taking them together adds up. The Gaul 2015 trial is the most direct test of this: a proprietary supplement containing 600mg magnesium, 400mg riboflavin and 150mg CoQ10 given daily to 130 migraine patients over three months.

Migraine days per month dropped from 6.2 to 4.4 in the supplement group vs 6.2 to 5.2 on placebo, with pain intensity and burden of disease scores also improving. The result was not dramatic, but it was consistent, and the safety profile was excellent, which is why fixed-dose migraine combinations sold in the UK typically follow this three-ingredient formula.

You can absolutely build the same stack yourself with individual UK GMP-certified products, which is usually cheaper than the proprietary combinations. The most important thing is to give any stack at least 8 to 12 weeks at trial-relevant doses before deciding whether it works, since almost all migraine supplement effects show up gradually rather than overnight.

Ginger, Feverfew and Other Supplements You Will See Recommended

Beyond the big three, several other supplements pop up in migraine forums and pharmacy shelves. The evidence for these is weaker or has specific safety concerns, so they belong in a lower tier of your decision making.

Feverfew has small trials suggesting a modest benefit, but the AAN grade is Level B for a specific extract (MIG-99) that is hard to source in the UK. Generic feverfew capsules may not deliver the same effect. Supplements Wise does not currently stock feverfew.

Ginger has small studies showing a possible benefit for acute migraine attacks (not prevention), with 250mg to 500mg powdered root taken at the first sign of an attack. It is thought to work via similar anti-inflammatory pathways to sumatriptan, though the effect is far weaker.

Butterbur was previously recommended by the AAN but has been dropped from most guidelines because of hepatotoxicity concerns from unregulated products. Only PA-free (pyrrolizidine alkaloid-free) preparations should ever be considered, and even then most UK bodies now advise against it.

Omega-3 fish oils have mixed data, with some trials showing a small benefit for reducing migraine frequency but no consistent effect on severity. Most migraine specialists rank omega-3 as a nice-to-have rather than a core recommendation.

Melatonin has some evidence for reducing migraine frequency at 3mg daily, but is prescription-only in the UK for most adults, so this is not a route open to most home supplementers without a GP consultation.

Who Should Avoid These Supplements

Even safe supplements have people they are not suitable for. The most important groups to know about, and to talk to your GP before starting anything, are:

Kidney disease: high-dose magnesium (400mg+ daily) can accumulate and cause dangerous heart rhythm problems in people with reduced kidney function. Always check with your GP if you have any kidney condition.

Pregnancy: The Migraine Trust considers magnesium and riboflavin generally safe in pregnancy at typical doses, but CoQ10 is not recommended in pregnancy due to insufficient safety data. Speak to your midwife or GP before starting any supplement while pregnant or breastfeeding.

Blood-thinning medications: CoQ10 can interfere with warfarin and other blood thinners. High-dose magnesium can affect certain heart and blood-pressure medications. Bring the labels of anything you are taking to your GP or pharmacist for a compatibility check.

Children under 18: paediatric dosing is different, evidence is thinner and self-supplementation is not advised. Anyone under 18 with migraine should be assessed by a paediatric neurologist.

When to See Your GP or Neurologist

Supplements are not a substitute for medical care. There are specific migraine-related situations that need urgent or same-day GP review, and it is important to know what they look like.

Chronic migraine (15 or more headache days per month) is a specific diagnosis that qualifies for NHS neurology referral and access to prescription preventives like propranolol, topiramate, amitriptyline, Botox and CGRP monoclonal antibodies (erenumab, fremanezumab, galcanezumab). Supplements sit alongside these treatments, not instead of them.

How to Build a Sensible Migraine Supplement Stack

If you are new to migraine prevention supplements, the sensible order is to start with one supplement, wait 8 to 12 weeks, then decide whether to add the next. Piling all three on at once makes it impossible to know which is doing the work if you improve, and it maximises the chance of a stomach adjustment or other side effect.

Alongside supplements, the lifestyle changes with the best migraine evidence are hard to beat: consistent sleep timing, adequate hydration, regular meals, moderate aerobic exercise and limiting known triggers (typically alcohol, poor sleep, dehydration and hormonal shifts). No capsule outperforms fixing a chronic sleep debt or a five-cup coffee habit.

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Related reading: Coenzyme Q10 300mg UK Evidence Guide, Best Time to Take Magnesium, Magnesium Citrate vs Glycinate vs Complex, Perimenopause Supplements UK Evidence Guide, Magnesium for Sleep. For NHS guidance, see the NHS migraine page and The Migraine Trust supplements page.