New Zealand's Health Supplements & Vitamins Specialists - Delivering to Australia for over 20 years
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Thompson's Ultra Marine Magnesium 550


60 tablets


RRP: $27.30

You save 47% ($12.80)


RRP: $27.30

You save 47% ($12.80)

Thompson's Ultra Marine Magnesium is a high potency formula providing 550mg of elemental Magnesium per tablet derived from a natural source.

Magnesium helps relieve spasms and muscle cramps caused by Magnesium deficiency. It plays an important role in muscule relaxation and helps maintain the structural integrity of bone.

Magnesium may also be beneficial during times of stress, may help support healthy heart function and helps relieve pre-menstrual symptoms.


Take one tablet daily (with food) or as professionally prescribed.

Each Tablet Provides:

Marine Magnesium 1.7g (1700mg)
Equiv to Magnesium 550mg

Tabletting aids


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.

Email: [email protected]

Australia Free Phone: 1800 040 156

Other Countries Phone: +64 3 265 9758

Live Chat: Between the hours of 7am – 3pm AEST

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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5 Item(s)

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Tablets are to small Review by

I can swallow these tablets whole without water easily.

To suggest they're too big is silly, crush them up if you can't swallow them!!

Solved size problem Review by

It was suggested to me to swallow these tablets with Yoghurt. I place tablet in 1 desert spoon of yoghurt, and slides down fine.

Too big Review by

These tablets are massive and very hard to swallow.

Tablets too large. Review by

These tablets are humongous and just looking at them sends my throat into a spam so unfortunately I cannot take them. Even cutting them in half doesn't do the trick.

Not for anyone who struggles with big tablets Review by

This is a great strength but I found great difficulty swallowing the huge tablets so have gone back to the capsule form

5 Item(s)

per page

Product Highlights

  • Helps relieve muscular cramps
  • Helps maintain bone health


  • TRUSTED NZ SUPPLIER To Australia for over 20 years
  • FREE DELIVERY Free Tracked Airmail Delivery within Australia When You Spend Over $79
  • 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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