Ashwagandha vs Magnesium: Which Is Better for Stress and Sleep?

Can you take ashwagandha and magnesium together?

Yes, for most healthy adults. Magnesium isn’t on the ashwagandha interaction lists from Memorial Sloan Kettering or the US National Center for Complementary and Integrative Health (NCCIH), and there’s no known interaction. No study has tested the pair together, so the evidence is for each one on its own.

Ashwagandha in the morning, magnesium at night: a timing plan

• Breakfast: ashwagandha with food, as an upset stomach is its most common side effect. Most trials split the dose between morning and evening; split your label dose rather than doubling it.
• Evening: magnesium, with your evening meal or before bed. Many people choose glycinate for the evening.
• Same time daily: no trial compared times of day. See when to take ashwagandha and the best time to take magnesium.

Taking them at the same time is fine too: no gap is needed.

Both can leave you drowsy

Drowsiness is a listed side effect of ashwagandha. Magnesium isn’t a sedative, but some people feel more ready to wind down after an evening dose (see does magnesium make you sleepy?). Together the effects may add up, so see how the pair affects you before driving, and take care with alcohol, other calming products or sedative medicines.

Who shouldn’t take them together

• Pregnant, trying to conceive or breastfeeding: avoid ashwagandha.
• Thyroid, liver or autoimmune conditions: avoid ashwagandha unless your doctor agrees.
• Regular medication, especially thyroid, sedative, anti-seizure, immunosuppressant, diabetes or blood pressure medicines: GP or pharmacist first.
• Surgery coming up: stop ashwagandha at least two weeks before.
• Kidney disease: no magnesium supplements unless your doctor advises them.

More in safety below, ashwagandha side effects and our ashwagandha UK safety review.

How to combine them sensibly

Start with magnesium, then add ashwagandha two to four weeks later, so you know which one causes any side effect. Stay at 400mg or less a day of supplemental magnesium and the 300 to 600mg of ashwagandha extract used in most trials. Check labels so you don’t double up: ashwagandha now turns up in gummies, sleep blends and CBD oils.

L-theanine is already in our Magnesium Glycinate Sleep Complex, so check before buying it separately. Melatonin is prescription-only in the UK: see melatonin in the UK. If you also take CBD, read taking CBD and ashwagandha together.

Which Evopure product fits your routine?

Taking both? Choose by time of day, not by a health goal (checked against our product pages, October 2026).

Product	Format	When people take it	What to know
Flow CBD Oil	Oil with ashwagandha and maca, 500mg or 1,000mg CBD	Morning, with breakfast	About 4 drops (500mg) or 2 drops (1,000mg) for 10mg CBD. Our only product with ashwagandha
Magnesium Glycinate Sleep Complex	Berry drink powder, 290mg magnesium a serving	Evening, stirred into water	No ashwagandha or CBD. Magnesium contributes to a reduction of tiredness and fatigue
Sleep CBD Oil	Oil with passion flower, 500mg or 1,000mg CBD	Evening, as the alternative to the magnesium drink	No ashwagandha. Same drops per 10mg as Flow; count CBD from both oils in your daily total

The FSA’s 10mg a day figure is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication.

Value: our bundle builder takes 5% off any two products, more as you add others. The 1,000mg Flow costs less per mg of CBD than the 500mg. Subscribe and Save lowers the price of every order, and you can skip, pause or cancel any time.

What you get with Evopure:

• Our CBD products: every batch third-party tested at ISO 17025 labs; request a batch report on our lab testing page.
• Our CBD is broad spectrum and THC free, on each batch report, and on the FSA public list, linked to validated applications.
• Made in the UK, vegan and alcohol-free.
• Tracked Royal Mail delivery, dispatched the same day if you order before 3pm Monday to Thursday (delivery details). Unopened, unused items can be returned within 14 days of delivery (returns policy).

They’re food supplements, not medicines. Ready to choose? Flow for the morning, the Magnesium Complex for the evening, or Sleep CBD Oil if you’d rather an evening oil.

Ashwagandha and magnesium glycinate

Glycinate is a popular form to pair with ashwagandha: it’s often taken in the evening and is usually gentle on the stomach. Glycinate and bisglycinate are the same compound (see magnesium glycinate vs bisglycinate).

Read the elemental magnesium, not the compound weight: 1,000mg of magnesium bisglycinate gives about 141mg of magnesium. Our Magnesium Glycinate Sleep Complex gives 290mg per serving from bisglycinate and citrate, with no ashwagandha, so it pairs with an ashwagandha product rather than doubling up.

Ashwagandha and magnesium for women

Women need 270mg of magnesium a day, and magnesium’s authorised claims apply to everyone. Ashwagandha trials in women are small and mostly about stress and sleep (see ashwagandha for women). Avoid ashwagandha if you’re pregnant, trying to conceive or breastfeeding, or have a thyroid condition. For magnesium by life stage, see magnesium for women and magnesium for menopause.

Ashwagandha vs magnesium at a glance

No trial has compared ashwagandha and magnesium head to head, so any “winner” is a judgement based on separate studies. The evidence for both is small, and neither is a treatment for anxiety, insomnia or any other condition.

Is ashwagandha better than magnesium?

It depends how much caution you need. Ashwagandha has more trials on stress and cortisol, but the certainty is low and its UK safety is under review. Magnesium has weaker evidence for stress and sleep, but it is a nutrient you need every day, with authorised health claims and a clear NHS amount from supplements that is unlikely to cause harm.

So for most people the order is simple: start with magnesium, especially if your diet is light on nuts, seeds, beans and greens. Consider ashwagandha later, if you are a healthy adult who isn’t pregnant, has no liver, thyroid or autoimmune condition, and has checked with a pharmacist about any medicines.

Ashwagandha: what the research shows

A 2022 review of 12 trials with about 1,000 people found ashwagandha reduced stress and anxiety scores compared with placebo, with the clearest effect for stress at 300 to 600mg a day. The authors rated the certainty as low, as many trials were small and results varied. A 2021 review of 5 trials found a small improvement in sleep, which was clearer in adults with insomnia, at 600mg a day or more, and over 8 weeks or longer.

On cortisol, the stress hormone, a 2026 review of 23 trials with about 1,700 people found ashwagandha lowered cortisol on average. A 2025 review of 7 trials found the same drop in cortisol, but no clear change in how stressed people said they felt.

For the full picture, see what ashwagandha does and how it works, the trial detail in ashwagandha for anxiety and ashwagandha for sleep.

Magnesium: what the research shows

A 2017 review of 18 studies found hints that magnesium helps people prone to anxiety, but rated the evidence as poor quality, and none of the studies used a proper measure of stress. A 2024 review of 15 trials found most reported an improvement in at least one sleep or anxiety measure, though the trials were small and used different doses and forms. It’s most likely to make a difference if your diet is low in magnesium.

What we can say with confidence is what the GB register allows: magnesium contributes to a reduction of tiredness and fatigue, to normal psychological function, to normal functioning of the nervous system and to normal muscle function. The NHS says adults need 300mg a day (men) or 270mg a day (women), and that 400mg or less a day from supplements is unlikely to cause any harm.

Magnesium comes in many forms, and they differ in how much magnesium they carry and how they sit with your stomach. See magnesium glycinate, magnesium for anxiety and magnesium for sleep. For a general buying guide to forms and brands, see the best magnesium supplement in the UK.

Ashwagandha or magnesium for sleep, stress, anxiety and energy

For sleep

Both have small, low-quality sleep evidence. The ashwagandha sleep effect was clearest in people with diagnosed insomnia taking at least 600mg a day for 8 weeks or more. The magnesium sleep trials were tiny and mostly in older adults. As a starting point, magnesium glycinate in the evening is the gentler, lower-risk choice, and it fits easily into a wind-down routine. See your GP if poor sleep has lasted for months.

For stress and cortisol

This is where ashwagandha has the most trials, especially on cortisol levels. Magnesium has little cortisol data, but it does contribute to normal psychological function and to normal functioning of the nervous system. If stress is the main issue, the basics matter more than either supplement: see how to lower cortisol naturally.

For anxiety

Ashwagandha has more trials on anxiety scores and magnesium has fewer, weaker ones, but neither is a treatment for an anxiety disorder. If anxiety is affecting your work, sleep or relationships, speak to your GP, or refer yourself to NHS Talking Therapies. For the wider picture, see natural supplements for anxiety.

For energy and tiredness

Magnesium is the clear pick here, because it is the one with authorised claims: magnesium contributes to a reduction of tiredness and fatigue and to normal energy-yielding metabolism. Ashwagandha and maca have no authorised claims for energy. If you’re tired all the time, speak to your GP, as ongoing tiredness can have causes a supplement won’t fix.

Which should you choose? A quick checklist

Comparing adaptogens? See ashwagandha vs rhodiola and reishi vs ashwagandha.

Safety and who should avoid them

Ashwagandha

• Liver: there are published case reports of liver injury linked to ashwagandha supplements. In a case series from Iceland and the US, five people developed jaundice, nausea, tiredness and itching 2 to 12 weeks after starting; none had liver failure, and liver tests returned to normal within 1 to 5 months in those followed up. In a series of eight cases from India, three people with existing liver disease developed liver failure and died. Avoid it if you have a liver condition.
• Thyroid: ashwagandha can change thyroid hormone levels, and there are case reports of an overactive thyroid. Avoid it if you have a thyroid condition or take thyroid medicine, unless your doctor agrees.
• Autoimmune conditions: it may trigger or worsen autoimmune diseases, so avoid it if you have one or take immunosuppressants.
• Pregnancy and breastfeeding: avoid it. It may raise the risk of miscarriage at higher doses.
• Medicines: check with a pharmacist if you take sedatives (such as benzodiazepines), anticonvulsants, thyroid medicines, immunosuppressants, or diabetes or blood pressure medicines. Avoid it if you have hormone-sensitive prostate cancer, as it may raise testosterone.
• Common side effects: drowsiness, stomach upset and loose stools. More in ashwagandha side effects.

Magnesium

• Amount: 400mg or less a day from supplements is unlikely to cause harm; more than 400mg for a short time can cause diarrhoea.
• Kidneys: avoid supplements if you have kidney disease, unless your doctor advises them.
• Medicines: magnesium can reduce how well some antibiotics and osteoporosis medicines are absorbed, so ask a pharmacist about leaving a gap. More in magnesium side effects.

Our products are for adults (18+) only. We don’t recommend our products during pregnancy or breastfeeding.

What the FSA says about ashwagandha

As of October 2026, ashwagandha is legal to sell as a food supplement in the UK, but its safety is under review. The Food Standards Agency ran a call for evidence in 2024 and passed the responses to its Committee on Toxicity (COT). A risk assessment will follow, and the four UK nations will then decide on any future advice.

The COT discussed a third draft statement in September 2026. Its October update says the paper is being prepared for publication, so nothing final has been published yet. The FSA hasn’t published formal consumer advice either, but while the review continues it told Which? in June 2026 that it would advise people with pre-existing liver conditions and pregnant women to avoid ashwagandha supplements.

We’ll update this page when the COT statement is published. For the full timeline, read our ashwagandha UK safety review.

More guides

• L-theanine: doses and who should check first.
• Our reishi mushroom guide.
• For ashwagandha amounts by extract, see ashwagandha dosage: how much per day.
• What’s in Wild Nutrition magnesium.
• Magnesium glycinate vs citrate vs threonate.
• Some brands combine the two: see Wild Nutrition’s magnesium and ashwagandha for one example.
• Types of magnesium and what each is used for.
• If you’re also considering CBD, our guide to the best CBD oil for anxiety in the UK explains how people fit CBD, ashwagandha and magnesium into a day and evening routine.
• Shopping on the high street? See what’s in Home Bargains ashwagandha and magnesium.

For how quickly each one works, see how long ashwagandha takes to work.