Your body's stuck in stress mode.
Wired all evening, awake at 3am, wiped by afternoon. That's a cortisol pattern, not a sleep problem.
Full therapeutic doses
Bioavailable forms
Third-party tested
GMP-certified facility
Next-day NZ dispatch
You're not tired. You're tired and wired.
You did everything right. Off the screens, into bed at a reasonable hour, lights out.
And you're lying there wide awake. Body heavy and worn out. Mind going at full speed, running tomorrow's list, replaying today, refusing to switch off.
Or you drop off fine, then snap awake at 3am like someone flicked a light on. Wide awake for an hour, maybe two. Then the alarm goes and you're wrecked before the day has even started.
It isn't that you can't sleep. It's that your body won't power down.
Cortisol is meant to drop at night. Stress keeps it up.
Cortisol is your body's stress hormone. It peaks in the morning to get you going, then should fall away by evening so you can rest.
Under ongoing stress, that rhythm sticks. Cortisol stays high when it should be dropping, so you lie there exhausted but alert.
We're not going to tell you a scoop of magnesium switches cortisol off. What it does is support the nervous system that stress keeps on edge.
If you've tried magnesium before
Taken magnesium and felt nothing? Here's why.
Most people buy magnesium once, feel no difference, and decide it doesn't work for them. Usually it isn't the magnesium. It's the form and the dose.
Problem 1 · The form
Cheap forms barely absorb
The cheap magnesium on the supermarket shelf is often magnesium oxide. Your body absorbs less than 4% of it. The rest passes straight through. It's on the label, it just never gets into you.
Problem 2 · The dose
Underdosed by design
A capsule holds only so much, so a cheap formula gives you around 100mg of elemental magnesium, or less. The research showing real effects on sleep and stress used 300 to 400mg a day. At 100mg it was never going to do much.
Why it costs more
Built to work, not to a price.
The supplement industry runs on cheap forms, fractional doses, and good marketing. Most products are formulated to a price point, not to a result. That's why most people feel nothing when they take them.
Three forms. Full therapeutic dose. USA-sourced raw materials. GMP-certified, FDA-regulated facility. Third-party tested every batch. No fillers, no corner-cutting.
It costs more than a tub of magnesium oxide. It should. It's a different product.
Real comments. Real people.
64% of customers reorder within 90 days. Not on a subscription, not chased by an email. They just notice when they stop taking it.
Customer Reviews
Overall rating: 4.8 / 5 from 1620 reviews.
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
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 :)
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
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.
I've been taking Biosphere Nitric Oxide for just over 5 weeks now. Before I started my blood pressure was in the 140s/150s/ 90s. This month I have only had one spike and my daily readings are consistently lower with some now in the ideal or normal range. I am really pleased with this result so far.
Ive been taking these now for a little over a month an just love the way my skin feels, an how its helped me not getting any flu this winter . As a shift worker doing 12 hr shifts I think its really been a great help getting me thru the day. I highly recommend them.
This magnesium is almost magic, I have had hip pain for several years and 5 weeks in it had totally gone. Unfortunately its a little hard on my stomach so have had to cut down the dose to half, I can just feel my hip pain a little again with the half dose. I will try supplementing the half dose with Astaxanthin next order.
I was getting regular muscle cramps at night and in the 30 days I trialled Biosphere Magnesium I only got a cramp once or twice. Since then I tried another brand of magnesium but haven't had the same success. Mixes easily and the lemon-lime flavour I tried us pleasant to drink.
I’ve been taking Bio sphere Nitric Oxide for a couple of years now as part of my supplement protocols. I workout at the gym and also do a lot of breathwork and this compliments everything I do.
It tastes good, easy to use, and I've halved my blood pressure tablet. It seems to be working for me and I intend to remove the blood pressure tablet totally in a week or so. It's coming on holiday with me!
Take it with my morning decaf that has coconut milk - so I am taking 2 capsules with some fats. Recently had people commenting on how nice my skin is looking. I am 60yo and recovering from cancer treatment.
Really happy with the magnesium powder, mixes well, tastes great and is now part of my daily routine.
Perfect start to my day…great flavour and definitely an improvement showing in my blood pressure levels!
The lemon/lime Magnesium powder is delicious and refreshing. It certainly is helping reduce cramps and helps me get to sleep quickly and sleep for longer periods.
I take magnesium after the gym to help with cramp.
Onto my first jar and already have a back up ready to go. Tastes delicious . Even bought a new bottle to use .
My husband is slowly reducing his blood pressure medication by using Nitric Oxide. Blood pressure is finally reducing
Been taking Astaxanthin for about 6 weeks now and definitely notice my eye and skin health is better, also seem to have a bit more energy.
A nightly routine, super power sleep when I take the magnesium - such a distinctly better sleep than nights I don’t take it.
I’ve recently changed to Biosphere Magnesium and will be reordering. It is so easy to take and adjust the amount as needed. I particularly like the Mango Pineapple flavour and take it just before bed to stop leg cramps.
Great product
I have this in the morning. Great tasting and refreshing. Great start to the day
I have found this the only product, after many years of finding something to help my sleep. My sleep for past 13 years been erratic due to menopause and hectic life. I have used this for a month now with only a couple of bad nights sleep. I sleep through until 5.00am. Hallelujah. Thank you Biosphere. Great product. Also just started using your hydrate supplement. I'll see how that goes over next month too.
I've been forgetting to wear my prescription glasses, it's been 3 months. My hair is a little darker, my nails are stronger and my skin has a summery glow. Hoping for some relief to my joints....
Easy to take and Good value for money!
The longer I take these the better I have been feeling
I started using astaxanthin on 13 May 2026. I live with chronic inflammation that often leads to headaches and migraines, and since beginning the supplement I’ve noticed a meaningful shift. My baseline inflammation feels lower, and the frequency and intensity of my headaches and migraines have reduced. Another unexpected change has been with my eye floaters. They used to be a daily nuisance, but over the past weeks they’ve improved noticeably. This is simply my personal experience and not a medical conclusion. Yet the changes have been significant enough for me to share.
Biosphere Magnesium
Less than $0.94 per night. Two months supply.
Choose your flavour
- Three forms your body absorbs, at a dose you'll actually feel
- GMP-certified, third-party tested every batch
- Naturally flavoured. No fillers, no artificial sweeteners.
Full transparency
Every ingredient. Every dose. Nothing hidden.
Three chelated forms, each chosen for a specific job. No proprietary blends, no hidden fillers.
Calm and deep sleep
Magnesium Lysinate Glycinate Chelate
Albion-grade and gentle on digestion. Crosses the blood-brain barrier to calm the nervous system and support deep sleep. This is the form doing the heavy lifting on a wired-at-night pattern.
Muscle relaxation
Magnesium Citrate
Highly bioavailable and well tolerated. Helps muscles release the tension a stressed body holds onto all day.
Energy and recovery
DiMagnesium Malate
Bound to malic acid, the molecule your cells use to produce energy. Supports steady daytime energy and recovery.
The only risk is not trying it.
Take it for 60 nights. If you're not sleeping deeper and feeling calmer, get every dollar back. Just email us.
- No questions asked
- No need to return the tub
- Refunded to your original payment method
Questions people ask.
I've taken magnesium before and felt nothing. Why is this different?
Almost always the form and the dose. Many products use cheap, poorly absorbed forms at 100mg per serve or less. Biosphere uses three bioavailable forms at 400mg per serve. That combination is what actually produces a result.
I'm already taking magnesium. Will I notice switching?
Most people who switch notice a difference within the first week. Going from a poorly absorbed form at 100mg to three bioavailable forms at 400mg, your body feels it quickly. 64% of customers reorder within 90 days.
Will it make me groggy in the morning?
No. Magnesium works with your body's own wind-down, not against it. Unlike sedatives, there's no morning fog. Most people report waking clearer, not heavier.
Why powder and not capsules?
It absorbs faster. Dissolved in water it's ready to work, where a capsule has to break down first. It's also the only way to fit a full therapeutic dose into a single serve. And it's a nice drink: it tastes good, it gets a glass of water into you before bed, and that makes it easy to keep up.
When should I take it?
Most people take it in the evening, 30 to 60 minutes before bed, mixed into water. That's when a calming mineral does the most for a wired nervous system. It still works whenever you take it.
Is it safe with my medications?
Magnesium at this dose is safe for most adults. If you're on prescription medication, particularly blood pressure medication, antidepressants, or sedatives, check with your GP or pharmacist before starting.
What if it doesn't work for me?
You're covered by our 60-day money-back guarantee. Give it a real go. If you don't feel a difference, email us for a full refund. No forms, no questions.
Everything you need. Nothing you don't.
Less than $0.94 per night. Two months supply.
- 1 tub of Biosphere Magnesium · 60 servings · 400mg triple-form
- 20% off your first order, applied automatically
- Next-day Auckland dispatch on every order
- 60-day money-back guarantee, no questions asked