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Osavi Magnesium Citrate + B6 Powder
If you want vitamin B6 and supplemental magnesium without a cupboard full of separate bottles, this powder option from Osavi is a sensible place to start.
Why people take it
- Vitamin B6 contributes to normal protein and glycogen metabolism
- Vitamin B6 contributes to the regulation of hormonal activity
- Vitamin B6 contributes to the reduction of tiredness and fatigue
- Magnesium contributes to normal muscle function
- 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.
At a glance
£0.29
per daily dose
Moderate
evidence for magnesium
Our honest take
One 4 g scoop gives 400 mg of magnesium (107% of the daily reference intake) as Aquamin Mg magnesium citrate, plus 8 mg of vitamin B6. Magnesium citrate is a well-absorbed form, but 400 mg in one go is above the 250 mg a day from supplements that EFSA uses as its upper level, mainly because it can loosen stools, so many people will do better on half a scoop. The 8 mg of B6 is within the FSA's 10 mg advice, as long as you take nothing else with B6. The 250 g tub gives about 62 full scoops.
- You prefer a drink to swallowing capsules
- Your diet is low in magnesium-rich foods and you want a well-absorbed form
- You already take a B complex or multivitamin with B6
- You have kidney disease: check with your GP before taking magnesium
- You take antibiotics, bisphosphonates or thyroid medicine: ask your pharmacist about spacing the doses
The science
Magnesium· evidence: Moderate
Magnesium is an essential mineral found in green vegetables, nuts, seeds, wholegrains and beans. UK surveys show that some groups, particularly teenagers and some adults, eat less than the recommended amount. A supplement reliably raises intake, and people with a low intake or a diagnosed deficiency are the ones most likely to notice a difference. Most people eating a varied diet get enough from food.
Labels often show the weight of the whole compound (for example 1,000 mg of magnesium citrate), but only part of that is magnesium itself. What matters is the elemental magnesium per daily dose, compared with the NRV of 375 mg. Organic forms such as citrate, glycinate (bisglycinate), malate and taurate are generally absorbed a little better than oxide in small studies, but differences between them are modest and no form has been shown to be better for any particular use.
Magnesium is widely sold for sleep, stress and cramp. These are not authorised claims. Reviews have found the evidence for sleep is of low quality, and a Cochrane review found magnesium is unlikely to prevent ordinary muscle cramps in older adults.
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: Most supplements give 100–400 mg of elemental magnesium a day (NRV 375 mg). The NHS says adults need about 270–300 mg a day in total, mostly from food.
Safety: High doses loosen stools or cause diarrhoea, especially citrate and oxide. EFSA sets an upper level of 250 mg a day of magnesium from supplements, and the FSA advises that up to 400 mg a day from supplements is unlikely to cause harm. Magnesium can reduce absorption of some antibiotics (tetracyclines, quinolones) and osteoporosis drugs (bisphosphonates), so take them a few hours apart. Speak to your GP first if you have kidney disease.
Research we looked at:
NHS. Vitamins and minerals: others – magnesium. nhs.uk.
EFSA NDA Panel (2015). Scientific opinion on dietary reference values for magnesium. EFSA Journal 13(7):4186.
Expert Group on Vitamins and Minerals (2003). Safe upper levels for vitamins and minerals. Food Standards Agency.
Garrison SR et al. (2020). Magnesium for skeletal muscle cramps. Cochrane Database Syst Rev 9:CD009402.
Vitamin B6· evidence: Limited
Vitamin B6 (pyridoxine, or the active form pyridoxal-5-phosphate, P-5-P) helps the body use protein and make red blood cells and some brain chemicals. Adults need only about 1.2 to 1.4 mg a day, and most people in the UK get this easily from meat, fish, wholegrains, potatoes, bananas and fortified cereals. True deficiency is uncommon.
For people who are not deficient, there is little good evidence that extra B6 does anything useful. It is often combined with magnesium or zinc in sports products; the B6 in these is mostly there to carry the label claims.
The bigger issue with B6 is safety. Long-term high doses can damage the nerves in the hands and feet, and this has been reported at doses sold freely in shops.
Vitamin B6 contributes to normal cysteine synthesis. Vitamin B6 contributes to normal energy-yielding metabolism. Vitamin B6 contributes to normal functioning of the nervous system. Vitamin B6 contributes to normal homocysteine metabolism. Vitamin B6 contributes to normal protein and glycogen metabolism. Vitamin B6 contributes to normal psychological function. Vitamin B6 contributes to normal red blood cell formation. Vitamin B6 contributes to the normal function of the immune system. Vitamin B6 contributes to the reduction of tiredness and fatigue. Vitamin B6 contributes to the regulation of hormonal activity. (Applies where a daily dose gives at least 15% of the NRV, i.e. 0.21 mg.)
Typical dose: Adults need about 1.2 mg (women) to 1.4 mg (men) a day (NRV on labels: 1.4 mg). A supplement giving 1.4 to 10 mg is plenty.
Safety: The Food Standards Agency advises not taking more than 10 mg of vitamin B6 a day from supplements unless a doctor advises it. Taking more than this for a long time can cause loss of feeling in the arms and legs (peripheral neuropathy). Add up the B6 from all your supplements, including B complexes, magnesium/zinc products and multivitamins. Stop and see your GP if you notice tingling, numbness or burning in your hands or feet.
Research we looked at:
NHS. Vitamins and minerals: vitamin B6. nhs.uk/conditions/vitamins-and-minerals/vitamin-b
Expert Group on Vitamins and Minerals (2003). Safe Upper Levels for Vitamins and Minerals. Food Standards Agency.
EFSA NDA Panel. Scientific opinion on the tolerable upper intake level for vitamin B6. EFSA Journal 2023;21(5):8006.
Therapeutic Goods Administration (Australia) 2023. Safety review: vitamin B6 (pyridoxine) and peripheral neuropathy.
Ingredients & nutrition
Always check the pack you receive, as manufacturers sometimes update recipes.
How to use
Price per dose & how it compares
| Product | Size | Price | Per daily dose |
|---|---|---|---|
| This product | 250 grams | £17.99 | £0.29 |
| Osavi Magnesium Citrate + B6 | from £11.99 | £0.35 | |
| Essensey Magnesium + B6 | from £5.59 | – | |
| Olimp Nutrition Chela-Mag B6 Forte Sport Edition | from £18.99 | – |
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.
If you want vitamin B6 and supplemental magnesium without a cupboard full of separate bottles, this powder option from Osavi is a sensible place to start.
Why people take it
- Vitamin B6 contributes to normal protein and glycogen metabolism
- Vitamin B6 contributes to the regulation of hormonal activity
- Vitamin B6 contributes to the reduction of tiredness and fatigue
- Magnesium contributes to normal muscle function
- 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.
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