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O2B Magnesium Complex 500mg

5.0 (5 reviews)

$ 29.90$ 59.90

O2B Magnesium Complex is a high potency supplement containing 500mg of elemental Magnesium. Magnesium is a significant all-rounder for the body, supporting the relaxation of smooth muscle and healthy muscle tone, sleep quality and insulin sensitivity. People who suffer from stress, cramps in the night or who exercise regularly tend to use up their body’s magnesium reserves quicker than others.

$ 29.90

2 in stock

$ 59.90

47 in stock

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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.

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, supporting the body through muscle tension, twitches and cramps, but also supporting the function and output of the most important smooth muscle in the body, the heart.

Key benefits:

  • Supports the Central Nervous System
  • Supports relaxation of smooth muscle & healthy muscle tone
  • Supports a relaxed sleep
  • Supports healthy blood pressure
  • Supports heart health and cardiac output
  • Supportive for insulin resistance and healthy blood sugar levels


Each capsule contains:

  • Total Elemental Magnesium 500mg
  • Magnesium oxide 690mg
  • Magnesium amino acid chelate 165mg
  • Magnesium bisglycinate 175mg
  • 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.


5 reviews for O2B Magnesium Complex 500mg

  1. Amazing product!

    Review by Rosalee

    I’ve really noticed a difference since I’ve been using this product, highly recommend it!

  2. Used for years

    Review by Leanne

    I first used this from NFS about 20 years ago, then O2B (same product)… I have found over the years that I need to take it 15 to 30mins before going to bed.

  3. I won't run out again!

    Review by Jane

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

  4. 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. Will be buying again!*

  5. Try It!

    Review by Karen

    Try it!

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Please note that under the NZ Dietary Supplements Regs 1985 we are not able to publish Testimonials that suggest that any of our natural supplements can diagnose, treat, cure, change or prevent any disease, disorder or chronic condition. Please be mindful of these restrictions when you leave your review, avoid the use of words like ‘treat, ‘cure’, ‘pain’, ‘fix’ or the names of specific conditions or diseases. We welcome recommendations and comments about our customer service, delivery, packaging or how much we care for you, naturally :-)
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