skip to Main Content
Free shipping in New Zealand   |
  Freephone  0800 880 868

O2B Magnesium Complex 500mg

$ 29.90$ 59.90

5.0 (4 reviews)

O2B Magnesium Complex delivers a full 500mg of elemental magnesium in an easy to swallow 1-a-day capsule to provide relief from cramps, restless legs, and assist with relaxation and sleep. It is a great way of ensuring you get your recommended daily intake of this vital mineral to help keep operating at your best.

Out of stock$ 29.90

Out of stock

$ 59.90

20 in stock

View cartCheckout


O2B Magnesium Complex contains a very high level of this essential mineral that is used by every cell in the body. Some common signs of Magnesium deficiency include; weakness, muscle twitching or cramps, cramping during menstruation, insomnia and disrupted sleep, fatigue, irritability and decreased appetite, restless legs when trying to relax and irregular cardiac rhythm. As blood vessels contract excessively when Magnesium is deficient, supplementation is recommended for migraines, high blood pressure and asthma.

Support for:

  • Muscle tension & cramps
  • Restless sleep & Insomnia
  • Fatigue & low energy levels
  • Restless legs
  • Irregular heart beat
  • Asthma
  • Hypertension
  • Migraines

Key benefits:

  • Helps calm the Central Nervous System
  • Relaxes smooth muscle & supports healthy muscle tone
  • Cramp relief
  • Supports a relaxed sleep
  • Lowers blood pressure
  • Regulates heart rhythm & support cardiac output
  • Supportive for insulin resistance & helps to balance blood sugar levels

Magnesium participates in over 300 enzyme based reactions in the body, from glucose conversion, to production of fatty acids and proteins. Approximately half the total magnesium in the body is found intracellularly in soft tissue, and the other half is present in bone. With muscles containing nearly 30% of all Magnesium found in the body, Magnesium is vital for muscle relaxation and bone growth and repair. It helps smooth muscles to relax, relieving muscle tension, twitches and cramps, but also in regulating the output of the most important smooth muscle in the body, the heart.


Each capsule contains:

  • Total Elemental Magnesium 500mg
  • Magnesium oxide 690mg
  • Magnesium amino acid chelate 165mg
  • Magnesium succinate 150mg
  • Magnesium aspartate 135mg
  • May contain encapsulating aids


Yeast, corn, wheat, artificial flavours or preservatives.


Take 1 capsule in the evening with food for enhanced absorption or as directed by your health care professional.


Always read the label. Take only as directed. Not to be taken during pregnancy or during breast feeding.



If taking Tetracycline or Quinolene antibiotics separate doses by at least 2 hours.

Magnesium may reduce absorption and efficacy of these medications. If taking prescription medication or if in doubt, consult your health care professional.


4 reviews for O2B Magnesium Complex 500mg

  1. Try It!

    Review by Karen

    O2B’s Magnesium has completely fixed my increasingly debilitating SVT! Try it! *

  2. It Works

    Review by Wendy

    I’d been recommended by my doctor to get a magnesium supplement with multiple forms of magnesium in it (to maximise absorption as the different forms apparently are absorbed differently) and decided to try O2B Healthy’s version. To be honest, I wasn’t sure it was doing anything at all. I’d been using magnesium oil daily for at least 2 years, etc., but still had muscle pain and foot cramps. I’d heard it can take years to recover from a chronic deficiency. Anyway, the capsules were taken in addition to using mag. oil. When I ran out of the bottle of capsules I decided not to replace it – as I wasn’t sure it was doing anything. However, I’ll say that I was surprised to discover that I have had a marked increase in cramping since running out and using magnesium oil only. I had thought that the reduction in cramping might have been due to my body having achieved a better balance of magnesium – but it seems that it was at least in part due to taking these capsules. Will be buying again!*

  3. I won't run out again!

    Review by Jane

    I ran out two weeks ago and since stopping I have felt bloated and restless sleep. I can see from my Fitbit sleep tracker how my sleep patterns have changed. I won’t run out again! *

  4. Used for years

    Review by Leanne

    I first used this from NFS about 20 years ago, then O2B (same product) to stop Restless legs Syndrome. I had tried others but this was the only one that means completely none of the muscle twitches, spasms etc. I have found over the years that I need to take it 15 to 30mins before going to bed.

Leave a customer review

Your email address will not be published. Required fields are marked *

You may also like…

Back To Top