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Thompson's Organic Magnesium


  • 50 tablets

    RRP: NZ$25.20

    You save 20% (NZ$5.00)

  • 120 tablets

    RRP: NZ$44.20

    You save 31% (NZ$13.80)

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    Magnesium Complete


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Thompson's Organic Magnesium is a high potency Magnesium complex for the relief of cramps, nervous tension and the symptoms of PMS.

Magnesium is a 'master mineral' that coordinates the proper function of nerves, muscle, blood vessels and bones, with 70% of the body's magnesium stored in the bones and teeth. Processed foods, alcohol, the use of diuretics, liver or kidney disease, and the use of oral contraceptives can all deplete magnesium in the body and bones.

Because Magnesium is best absorbed in a 'bound' form, Thompson's Organic Magnesium Complete has been formulated to include a range of forms of magnesium that help the body absorb and use the mineral. Thompson's Magnesium Complete contains Magnesium aspartate, Magnesium orotate and Magnesium amino acid chelate. These organic forms are better absorbed and better utilised than inorganic forms, because they are presented to the body in a form which can be more readily and rapidly absorbed. Thompson’s Organic Magnesium Complete is, thus, a highly bioavailable form of Magnesium, in a base of the Magnesium-rich wholefoods, Kelp. It also contains Vitamin B6 and Vitamin D as cofactors involved in the absorption and utilisation of Magnesium.

Indications for use: 

  • Gallstones or kidney stones
  • Brittle or porous bones
  • Muscle cramping
  • Anxiety, depression and irritability
  • PMS symptoms, including breast tenderness, weight gain and cravings
  • Fatigue, including chronic fatigue.


Adults take one tablet a day (between meals), or as professionally prescribed.

Each Tablet Provides:


  • Pyridoxine Hydrochloride (Vitamin B6) 30mg
  • Cholecalciferol 2.5mcg (Equiv. Vitamin D 100 IU)


  • Magnesium Aspartate 100mg (Equiv. Magnesium 7.5 mg)
  • Magnesium Orotate 100mg (Equiv. Magnesium 6.4 mg)
  • Magnesium Amino Acid Chelate 805.5mg (Equiv. Magnesium 161 mg)
  • Magnesium-Rich Wholefoods:
  • Kelp (Equiv. Fucus vesiculosus herb dry) 25mg

No Added: Dairy, gluten, egg, nuts, shellfish, soy, wheat, yeast, artifical colouring, flavouring or preservatives.


There are a variety of health concerns that Thompson's products may be able to assist with, such as General Energy and Vitality, Healthy Aging, Stress Management and Children’s Health.

Junior Immunofort is a popular immune boosting formula that children love. It is packed full of vitamins, minerals and nutrients that may help support their overall health. 

Thompson's Grape Seed 19,000 tablets are rich with antioxidants like proanthocyanidins, which may protect cells from rogue free radical damage.

Thompson's is an established market leader in New Zealand, and now proudly exports its products internationally.

Your satisfaction is of paramount importance to us! If we can help in any way please contact us using the details below.


New Zealand Free Phone: 0800 148 148

Other Countries Phone: +64 3 524 8414

Live Chat: Between the hours of 9.30am – 4pm

You can also subscribe to the HealthPost email newsletter for all the latest news, health info and exclusive special offers. Find out more about our guarantee, payment options and delivery times, or view our FAQs page for frequently asked questions and answers.

We also highly recommend reading product reviews. They can be a great way of finding out that little bit extra about products you're interested in.

We publish all helpful customer reviews, including negative reviews - these are genuine!

Customer Reviews

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Items 1 to 10 of 39 total

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Sleep Well Review by

I seem to sleep very well taking Magnesium at night. Having a good sleep works well for a nice relaxing day the following day.

Good value product Review by

I have been taking Thompson's Organic Magnesium for years now, it is really effective for reducing muscle cramps. I have tried other brands but always come back to this one. It works and is cost effective, especially when buying 120 tablet jars.
I recommend this product to anyone who has a magnesium deficiency.

Tell the world Review by

I tell all my clients that exercise to take magnesium....anyone who needs a better sleep....restless legs....cramps...brilliant product!!!

Very good Review by

Excellent product. Been using it a long time. Dont feel nervous now.

No more twitchy legs! Review by

I have tried other brands. But Thompson's Organic Magnesium is the best for me. It works quickly and I only need one tablet compared to 2 or 3 for other brands.

Tablets are so large they stick in ... Review by

Tablets are so large they stick in my throat. Finally I binned them for fear of choking.

I suffered from cramp for years but... Review by

I suffered from cramp for years but taking this product, I have absolutely none. It's given me a new lease on life & I advise anyone with the same problems to take it.

I have used this product to help wi... Review by

I have used this product to help with my fibromyalgia I was diagnosed several years ago with salicylate and sulphite intolerance this is the only product I have found to work for me it has made a positive impact on my pain level and sleeping pattern I also find your company a excellent one to deal with

This is the best brand of magnesium... Review by

This is the best brand of magnesium that I have tried. I have had positive results with other brands but Thompsons Organic Magnesium is the most effective. It helps with my anxiety / depression / mood, PMS and assists in a better sleep. Great stuff. I am now weaning off the anti depressants.

This is by far the best magnesium p... Review by

This is by far the best magnesium product. I have tried other brands but they do not have the same quality effect. Have been using for muscle cramps after exercise and also seems to help with improvement in a better quality of sleep.

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Product Highlights



    We Deliver Worldwide

    International orders are welcome and we offer you a choice of either Airmail or Courier delivery to best suit your needs.

    Airmail to all countries is via an untracked service.  All Courier delivery options are tracked, and tracking details will be emailed to you with your order dispatch confirmation.

    The exact delivery cost of your order will be clearly displayed for your approval during the checkout process. You can estimate the delivery cost of the goods in your cart at any stage by using our 'Postage Estimator' on the Shopping Cart Summary page.

    See our Delivery page for more information.

    International Delivery Charges (all prices in NZD)


    See also dedicated site:

    Airmail (4-10 working days)
    $5 per kg flat rate

    Courier (3-6 working days)
    $15 first kg plus $5 per additional kg

    China including Hong Kong and Macau

    EMS China (3-8 working days)
    $10 first kg plus $5 per additional kg

    Japan, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand and Vietnam

    Airmail (5-15 working days)
    $5 first kg plus $10 per additional kg

    Courier (3-8 working days)
    $10 first kg plus $5 per additional kg

    Rest of East Asia

    Airmail (5-15 working days)
    $15 first kg plus $5 per additional kg

    Courier (3-8 working days)
    $70 first kg plus $20 per additional kg

    USA, UK & Europe

    Airmail (5-15 working days)
    $15 first kg plus $15 per additional kg

    Courier (3-8 working days)
    $30 first kg plus $10 per additional kg (selected countries – see *)
    Or $70 first kg plus $20 per additional kg

    South Pacific

    Airmail (5-15 working days)
    $10 first kg plus $10 per additional kg

    Courier (3-8 working days)
    $20 first kg plus $5 per additional kg to Cook Islands, Samoa, Tonga and Vanuatu
    Or $70 first kg plus $10 per additional kg

    Rest of World

    Airmail (5-15 working days)
    $20 first kg plus $15 per additional kg

    Courier (3-8 working days)
    $30 first kg plus $10 per additional kg (selected countries – see *)
    Or $70 first kg plus $20 per additional kg

    * $30 first kg delivery to USA, UK, Europe and Rest of World is only available to:

    Austria, Belgium, Brazil, Canada, Costa Rica, Croatia, Czech Republic, Denmark, Ecuador, El Salvador, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Mexico, Netherlands, Norway, Poland, Portugal, Romania, Slovenia, Spain, Sweden, Switzerland, United Kingdom, Uruguay and USA.

    Customs / Import Regulations

    Customs and import regulations vary widely between countries. Some of the products we sell via this website are prohibited for importation into certain countries. Unfortunately, it's not possible for us to be aware of all of the regulations specific to any given country. Where we are aware of any particular import restrictions, we endeavour to make note of this on the product detail page.

    HealthPost Ltd accept no liability for the refund/replacement of any goods or any costs relating to, or arising from, the importation or confiscation of any goods by your countries Customs Office or other government body. Read more about our Customs / Import Regulations Policy.

  • FREE NZ DELIVERY When You Spend Over NZ$79, Or Just $4.50 Per Order
  • EARN BONUS Reward Points With Every Order learn more

    30 Days Hassle Free Return Service

    Your satisfaction is extremely important to us. Any problems will be addressed in a friendly and efficient manner, with your total satisfaction as our over-riding concern.

    Our Return Policy

    If you have changed your mind about a product and it is in re-saleable condition (unopened, with undamaged packaging) you can return it within 30 days of receipt for a full refund.

    For more info on returns, visit our Guarantee page.

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