Astaxanthin is vital for us all in this aging process. Every blessing we can get for all round health and optimal function is a bonus. We are grateful for the bioavailable source. Regards Steve and Fiona
If you wake up at night with leg cramps, your body is short of one specific thing.
It's magnesium. The right form, at a dose that actually works.
$69.99
$56.00 NZD
Save $13.99
20% off your first tub · $0.93 per night
60-day money-back guarantee ·Next-day Auckland dispatch
400mg therapeutic dose
Three magnesium forms
Third-party lab tested
GMP USA facility
150+ NZ stores
What you are dealing with
It is not just the cramp.
A sharp, stabbing pain in your calf or foot. You wake up in agony, stretch it out, and lie there waiting for it to come back.
Some nights it happens two or three times. You have stopped being surprised by it.
And it is not the only sign. People who get regular nighttime cramps usually notice a few other things too:
Restless legs in the evening that will not let you settle.
General muscle tightness that never quite releases.
Waking in the night even on nights without cramps.
These are not three separate problems. They share one root cause.
Why your body keeps doing this
It isn't something your body does. It's something your body is short of.
Muscles work on a two-signal system. Calcium tells them to contract. Magnesium tells them to release.
When magnesium levels drop, the release signal weakens. Your muscles contract but struggle to fully let go.
At night, this becomes a problem. Your circulation slows. Your muscles cool. You are not moving. A small trigger, turning over, pointing a foot, fires a contraction your muscle cannot release quickly enough.
That is the cramp.
Restless legs follow the same pattern. Nerves held in low-level tension. Muscles that cannot fully settle. Moving temporarily relieves it, but until the mineral balance is restored, it keeps coming back.
This is not age. It is not random.
It is a mineral balance problem, and it is correctable.
60-day money-back guarantee.No improvement, full refund.
We did not try to make the cheapest magnesium. We made the one most likely to reach your muscles.
Walk into any pharmacy and you will see a wall of magnesium products. Twenty different brands, all competing on price, all looking roughly the same. Most people pick one, try it for a few weeks, notice nothing, and assume magnesium is not for them.
The problem was never the magnesium. It was the product.
Many magnesium products use forms your body barely absorbs. They break down in your stomach, most of the magnesium passes straight through, and very little reaches the muscles and nerves that actually need it.
We took a different approach. Instead of trying to hit a price point, we asked one question: what would it take to give someone the best possible chance of actually noticing a difference?
The answer
Magnesium Citrate
Highly soluble. Rapid absorption. Targets muscle relaxation.Magnesium Malate
Gentle, sustained delivery. Supports cellular energy and recovery.Magnesium Glycinate Chelate
Crosses the blood-brain barrier. Reaches your nervous system directly.No artificial sweeteners, colours, or flavours. Because cutting corners on quality to save a few cents defeats the purpose of making a product that works.
400mg elemental magnesium per serve. Three bioavailable forms.
Not the cheapest. The one most likely to reach your muscles.
New Zealand's Most Reviewed Magnesium.
Customer Reviews
Overall rating: 4.8 / 5 from 1677 reviews.
I have tried many supplements over the years. Some I’ve stopped using because I didn’t notice a difference. I Will always aim to keep astaxanthin as part of my stack. I have noticed such an amazing change in my skin. My skin has always been good, but this has taken it to another level. I love this product! I particularly love the Biosphere brand as they use olive oil in the capsules, rather than seed oils. Really happy to support this NZ company.
Great product, I have been using it to help my eyes feel more comfortable ( post menopause) , they are definitely less scratchy than they were! I can’t wait to try the magnesium yet, it looks really good.
We both have the best sleep usimg this product. I am about to put in another order.
Lovely flavour and works really well.
I rely on 'Sleep' to help my sleep. Its a vial part of my evening ritual. I notice when I dont take it
Great for dry eyes. Best I've tried
Take this every night for restless legs and sleep . Alternate between the 2 flavours
Very good product but I did have to adapt it. I found taking it just before bed it would give me a hit of energy. So I no take it with dinner or just after around 7 and it gives my body time to process the ashwaganda. I still do have trouble sleeping but I do feel the nights I do sleep it’s a deeper sleep. I am going through a lot of stress and biological changes but I do feel it has helped just not as much as I hoped. The flavour is delicious and the customer service was awesome. I’m going to try the plain magnesium next time as I think ashwagandha not well suited to me
Great product - slept soundly :)
I’m loving this quality magnesium product from BioSphere as it has transformed the quality of my sleep.
I was sceptical but desperate when I started using Gut Support. After the first month, there hadn’t been a huge change, but I decided I was going to give it 2 months. Only a week into the second tub I noticed a definite change, and after not quite 2 months my system is so much calmer and more regular - the best it has been in nearly 6 years.
Nerve pain gone , deep sleeps after taking this . ! I am about to reorder , thanks guys 😍
This has been a game changer for me . It has eased pain and cramping at night . It promotes a feeling if calm and relaxation . I will never stop using this . Please buy it . I promise you won’t be sorry . Carolyn
Just love this product. I am on my third tin. I have been able to halve my blood pressure medication.
Sleep so much better and no more cramps
I won't need to ask for my money back. It works! The quality of my sleep has improved 10 fold.
Helps me stay asleep all night long
Prompt delivery and high quality. Noticed my eyesight not troubling me as much within a week.
It was a tough winter but this Biosphere Immune got us through.
I began taking this product 2 weeks ago to help with my sleep due to RLS and aching muscles due to injuries. Its great. I fall asleep well and sleep longer. I love the lemon lime flavour too!
Great quality astaxanthin and an easy addition to my daily supplement routine. I take it for its antioxidant, skin and general healthy-ageing benefits. Simple, well-dosed and no fuss. Very happy with it.
Awesome product!
Love it
Really like the flavour and taste, it encourages me to use it daily !
My husband and I have both been taking Biosphere Nitric Oxide, and we’ve been really happy with how we feel since starting it. We both feel so much better overall and have noticed a real difference in our general well-being and energy. It’s now become part of our daily routine, and based on our personal experience, we’re very pleased with it. It’s not often that we find a product that we both feel has made a noticeable difference, but this one has. We’ll definitely continue taking it!
Another one bites the dust! I’m really benefiting from taking this product every evening. I’m sleeping through the night, and waking refreshed. I would recommend this to anyone as a fuss free, easily digestible form of magnesium for settling your nervous system and allowing good sleep patterns.
Really like the Biosphere Magnesium. It's so helpful before and after hard physical work when I tend to get plagued with cramp. Alongside other salts & good hydration it's been great .Also very pleasant to drink. My wife also likes to use it at night for restless legs & to help relax. 😊
I love this product. I noticed an improvement in my skin. Looks and feels so much smoother.
I have systemic health issues and this is great for sleep, nerves and digestion (in a slow moving system). Great combination of types of magnesium. Easy to mix and take.
Great product. I take it every morning 🙂
Having parkinsons disease, exercise is very much my medication but has consequences the magnesium helps with the cramps and sleep quality which makes tomorrow better.
Love this product, after my first month I have far more mobility, energy and stamina, will be purchasing more...
I haven't gotten my very first bottle yet, but I will be ordering more. Capsules are easy to swallow, and makes it easy that need to take with food . Easy to remember with breakfast
It’s one of those things that you don’t you don’t know what you’ve got ‘til it’s gone! I was sleeping well and didn’t notice my gym recovery was good until I ran out of magnesium! Without it, my sleep is terrible and I’m sore for days after working out. Ordering more now!
On my second month of astaxanthin, not much change except a little more energy generally. Will give it a full three months.
I am so happy with my Astaxanthin . Can’t believe that it has worked so quick at pain relief . I have tried lots of other products in many years and I think this is the best thing I have tried . I have no pain and it so good . I hope this keeps up I have arthritis and and a few joint replacements so always in pain . Thank you
Awesome flavour magnesium for a massive day in the mountains!!!
Both flavours are nice and the powder mixes well. No longer getting night time cramps, so very happy with this. Will definitely be continuing with this product.
Awesome product.
60-day money-back guarantee
If you don't feel a difference, you get every dollar back. No forms. No questions asked. Just email us.
4.8/5 from 934 verified reviews
Biosphere Magnesium
60 ServingsTriple-Form400mg Therapeutic Dose
$69.99$56.0020% Off
About $0.93 per night. Two months supply.
Choose your flavour:
- No artificial colours, flavours, or sweeteners
- Third-party tested for purity and heavy metals
- GMP certified, FDA-regulated USA facility
60-day money-back guarantee
Next-day Auckland dispatch
MagnesiumBlueberry-Pomegranate
1
What to expect
What changes when your magnesium levels come back up.
Magnesium does not force muscles to relax. It restores the balance that makes relaxation possible. Results build with consistent nightly use.
Days 3 to 7
The cramps start to ease. They may still come, but less often and less severe. Some people find entire nights pass without waking. Your calves feel less tight in the morning.
Weeks 2 to 3
Cramps become occasional instead of nightly. You start sleeping through. Restless legs settle earlier in the evening. The background muscle tension starts to release.
Weeks 3 to 6
Cramps stop being a nightly event. Mornings feel different when sleep has not been interrupted. Your legs feel like they belong to you again.
No sedation. No side effects. No dependence.
Just muscles that can finally let go.
Why this keeps happening
Your body cannot make magnesium. It can only use it and lose it.
Most people assume they get enough from food. They do not. Modern life drains magnesium faster than most diets replace it.
STRESS
Burns through it with every stress response
COFFEE & TEA
The more you drink, the more your kidneys release
MEDICATIONS
Reflux tablets and blood pressure pills reduce absorption
AGE
The same diet that worked at 30 is not enough at 50.
ALCOHOL & SUGAR
Both accelerate the loss
MODERN FOOD
Decades of farming have depleted the soils
Most adults in their 40s, 50s, and 60s are dealing with several of these at once. The cramps are not the problem. They are the symptom of a shortage your body has been accumulating for years.
Your muscles are not failing. They are missing the mineral they need to release. That is specific. And it is fixable.
Our promise to you
60
Days money-back guarantee
No improvement. Full refund. No return required.
You have tried things before. We know.
The stretching. The bananas. The tonic water. Maybe even a magnesium product from the supermarket that did nothing.
You are right to be cautious about trying something new.
So do not take our word for it. Take our guarantee.
Try it for 60 days. If your cramps do not improve, you get every cent back.
No forms. No arguments. No return required.
You either notice the difference, or you do not pay for it.
64% of customers reorder within 90 days. That is when most people decide they are not willing to go back to how it was before.
Questions worth answering
Honestly, in plain English.
I have tried magnesium before and it did not help my cramps.
Many magnesium products use forms your body absorbs poorly, at doses too low to reach your muscles in meaningful amounts. If you tried one and felt no difference, the product most likely was not delivering enough usable magnesium where it was needed. Biosphere uses three forms specifically chosen for absorption, at a full 400mg elemental dose per serve. The form and the dose are the entire reason it works or it does not.
Will it help with restless legs as well as cramps?
Many customers report restless leg improvement alongside cramp reduction. The underlying cause is the same: muscles and nerves that cannot fully settle. Magnesium helps both.
Is it safe to take every night long-term?
Yes. All three forms of magnesium in this product are well researched and safe for ongoing daily use. Many customers have been taking it for over two years.
Is it safe alongside medications?
Magnesium is generally safe, but if you are taking prescription medications, it is worth a quick conversation with your GP before starting. This is especially true if you take anything for blood pressure, reflux, or kidney function.
You have adjusted. You have stretched. You have accepted.
Now try addressing the actual cause.
Your muscles are not doing this randomly. They are doing it because the mineral that tells them to release is not present at the level your body needs.
That is specific. And it is addressable.
$69.99
$56.00 NZD
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