x 0
Skip to main content

Blackmores Bio Magnesium


  • 50 tablets

    RRP: $17.50

    You save 30% ($5.30)

  • 100 tablets

    RRP: $30.20

    You save 30% ($9.10)

Blackmores Bio Magnesium may assist with the relief of muscular aches and pains, muscular cramps and spasms. It may also assist in the relief of symptoms of pre-menstrual syndrome such as weight gain, swelling of extremities, breast tenderness, abdominal bloating and mood changes.

 Features and benefits:

  • One tablet contains the recommended daily intake (RDI) for magnesium.

  • Combines magnesium with co-factors for improved absorption and utilisation.

How it works:

Magnesium is essential for many cellular functions, particularly those functions involved in energy production, and for the normal functioning of muscle and nerve tissue. Signs of low magnesium levels can include fatigue, mental confusion, irritability, muscle cramps, problems with nerve conduction and muscle contraction and predisposition to stress.

If the blood is low in magnesium it takes it from the muscles and without enough magnesium in muscles they stiffen up or contract. The result may be painful cramps, irritability, twitching or even tremors. Sufficient magnesium helps all muscles in the body to function optimally.

The other nutrients present in Bio Magnesium assist with the utilisation of magnesium in the body. Vitamin B6 is an important co-factor, working with magnesium in many enzyme systems in the body. Studies have shown that combining B6 and magnesium can help to reduce PMS symptoms.


Adults - take 1 to 2 tablets a day with meals, or as professionally prescribed.


This product contains Pyridoxine hydrochloride which may be dangerous when used in large amounts or for a long time.

Pyridoxine-induced peripheral neuropathy is most commonly reported with doses of 1gm or more daily, taken for 2 months to 3 years.

Magnesium may decrease the absorption and efficacy of some medications. If taking tetracycline or quinolone antibiotics separate doses by at least two hours.

Pyridoxine may decrease the efficacy of some medications. Consult your healthcare professional before use if taking phenytoin or phenobarbitone (anticonvulsant drugs), or think you may be.

Each Tablet Contains:

  • Magnesium oxide - heavy 440mg
  • Magnesium phosphate 175mg
  • (equiv to total magnesium 300mg)   
  • Calcium ascorbate 250mg
  • Vitamin B6 (Pyridoxine hydrochloride) 50mg
  • Vitamin D3 100IU
  • (Colecalciferol 2.5mcg)
  • Manganese amino acid chelate 40mg 
  • (Manganese 4mg) 


Using a blend of traditional knowledge and scientific research, Blackmores is one of Australia’s industry leading brands and has a strong market here in New Zealand as well. The Blackmores range covers many Health Concerns such as ‘Colds, Flus and Immunity’, ‘Sleep, Stress and the Mind’ and ‘Healthy Ageing’, as well as many other categories.

One of their most popular products is Executive B Stress Formula which could assist with coping with stress and nervous tension, while their Pregnancy & Breast-Feeding Gold formulation has essential vitamins, minerals and oils for pregnant or lactating mothers.

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


Australia Free Phone: 1800 040 156

Other Countries Phone: +64 3 265 9758

Live Chat: Between the hours of 7:30am – 8pm 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

Write Your Own Review

You're reviewing: Bio Magnesium

Log in or Register to Write a Review

8 Item(s)

per page
Helps me sleep Review by
  • star

I go through phases when my emotions or muscle tension keep me awake or wake me early. But if I take one of these before going to bed I always get a really good night's sleep and wake in the morning feeling relaxed and refreshed.

This did the trick Review by
  • star

I got exactly what I was hoping for from this product: I take it before bed and my muscles relax, so the quality of my sleep is much better.

Blackmores Bio Magnesium Review by
  • star

Very good reasonable price

With Blackmores Bio Magnesium I no ... Review by
  • star

With Blackmores Bio Magnesium I no longer have to walk the house at night trying to ease the pain. It is a fast, easy and cost effective solution to nightime cramps.

Brilliant, affordable and really he... Review by
  • star

Brilliant, affordable and really helps me sleep

Have been using this product for a ... Review by
  • star

Have been using this product for a while now and highly recommend it. I'm sleeping better and no longer twitch like I did before.

Great product, fair price. It deliv... Review by
  • star

Great product, fair price. It delivers what it promises for sure. Been helpful for me for muscle pain. Due to the other ingredients i.e calcium I feel it is more effective.

I have tried this product recently ... Review by
  • star

I have tried this product recently to reduce cramps at night and bingo - they work beautifully. I like the easy to swallow tablet and feel they support my irritability, muscle cramps and fatigue.

8 Item(s)

per page


  • 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.

Please wait...

  • Product successfully added to cart
You have in your Shopping Cart

Product successfully removed from cart

Checkout Continue Shopping

Please wait, processing your order...