NOW Foods Magnesium Oxide

Name: NOW Foods Magnesium Oxide
Brand: NOW Foods
SKU: 733739013101
Price: 12.99 GBP
Availability: InStock

Brands: NOW Foods

£12.99

If you want supplemental magnesium without a cupboard full of separate bottles, this powder option from NOW Foods is a sensible place to start.

Why people take it

Magnesium contributes to normal muscle function
Magnesium contributes to the reduction of tiredness and fatigue
Magnesium contributes to the normal function of the nervous system
Magnesium contributes to electrolyte balance

How to use

Take as directed on the pack, ideally with food and at the same time each day.

Good to know

Format: powder
Caffeine free

A food supplement, not a substitute for a varied diet and healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.

Quantity

Free Shipping on Orders of £40

Flexible and secure payment

Questions? Our UK team is here to help

Guarantee Safe & Secure Checkout

Categories : Caffeine-Free Supplements, Everyday Health Supplements, Magnesium Supplements, NOW Foods, Vitamins & Supplements

SKU: 733739013101

At a glance

£0.02

per daily dose

Moderate

evidence for magnesium oxide

Our honest take

Pure magnesium oxide powder. A quarter teaspoon (about 500 mg) gives 290 mg of magnesium (77% NRV), which is above the EFSA upper level of 250 mg a day from supplements, and it is hard to measure such a small scoop accurately. Oxide is the cheapest form per milligram, but less of it is absorbed and it is the form most likely to cause loose stools. For most people a capsule or tablet of citrate or glycinate is easier and kinder to the gut.

You want the cheapest possible source of magnesium and your stomach tolerates oxide
You are comfortable measuring small amounts of powder
You have a sensitive gut: oxide is the form most likely to cause diarrhoea
You want an exact dose without measuring: choose capsules or tablets
You have kidney disease or take antibiotics or bisphosphonates: check with your GP or pharmacist first

The science

Magnesium oxide· evidence: Moderate

Magnesium oxide is the cheapest and most concentrated form of magnesium: about 60% of its weight is magnesium, so a small tablet can carry a large dose. It does raise magnesium intake, but in small studies a smaller share of it is absorbed than from organic forms such as citrate or glycinate, and more of it stays in the gut, where it draws in water.

That makes oxide a reasonable budget choice if you simply want to top up intake and your stomach tolerates it. If you have found other magnesium upsets your stomach, oxide is usually the worst option. There is no good evidence that any form is better for sleep, stress or cramp, and these are not authorised claims.

Authorised health claim
Magnesium contributes to a reduction of tiredness and fatigue.
Magnesium contributes to electrolyte balance.
Magnesium contributes to normal energy-yielding metabolism.
Magnesium contributes to normal functioning of the nervous system.
Magnesium contributes to normal muscle function.
Magnesium contributes to normal protein synthesis.
Magnesium contributes to normal psychological function.
Magnesium contributes to the maintenance of normal bones.
Magnesium contributes to the maintenance of normal teeth.
Magnesium has a role in the process of cell division.

These claims apply only where the daily dose provides at least 15% of the NRV (56 mg of magnesium).

Typical dose: Usually 200–400 mg of elemental magnesium a day (NRV 375 mg).

Safety: Oxide is the form most likely to cause loose stools or diarrhoea, and it is used as a laxative at higher doses. EFSA sets an upper level of 250 mg a day of magnesium from supplements; the FSA advises up to 400 mg a day is unlikely to cause harm. Take a few hours apart from tetracycline or quinolone antibiotics and bisphosphonates. Speak to your GP first if you have kidney disease.

Research we looked at:
Firoz M, Graber M (2001). Bioavailability of US commercial magnesium preparations. Magnes Res 14(4):257–262.
Walker AF et al. (2003). Mg citrate found more bioavailable than other Mg preparations in a randomised, double-blind study. Magnes Res 16(3):183–191.
EFSA Scientific Committee on Food (2001). Opinion on the tolerable upper intake level of magnesium.

Ingredients & nutrition

Ingredients: magnesium oxide. Nothing else.

Per daily dose (1/4 level teaspoon, about 500 mg): magnesium 290 mg (77% NRV).

Pack: 227 g, about 454 daily doses. Vegan.

Always check the pack you receive, as manufacturers sometimes update recipes.

How to use

Mix 1/4 level teaspoon into at least 180 ml of cold water or clear liquid and take once a day with a meal. The powder can heat liquid on contact, so always mix it into cold liquid. Do not exceed the stated daily dose.

Price per dose & how it compares

Product	Size	Price	Per daily dose
This product	227 grams	£12.99	£0.02
NOW Foods Magnesium Citrate		from £10.07	£0.13
NOW Foods Magnesium Bisglycinate Powder		from £16.99	£0.22
OstroVit Magnesium Citrate		from £7.39	–

Cost per daily dose lets you compare packs of different sizes fairly.Worked out from our current prices.

Food supplements should not replace a varied, balanced diet and healthy lifestyle. General information, not medical advice. Speak to your GP or pharmacist first if you are pregnant or breastfeeding, have a medical condition or take medication.