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
New Zealand's most reviewed magnesium
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 Auckland dispatch
The pattern
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.
The mechanism
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.
Unprompted
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 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.
Save 20% · Off your first order
4.8/5 from 934 verified reviews
Biosphere Magnesium
400mg Therapeutic Dose
60 Servings
$56.00$69.99SAVE $13.99
About $0.93 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.
60-day money-back guarantee
Next-day Auckland dispatch
Full transparency
Every ingredient. Every dose. Nothing hidden.
Chelate, citrate and malate, each chosen for a specific job. No proprietary blends, no hidden fillers.
100mg
Elemental
from 1000mg chelate
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.
150mg
Elemental
from 1000mg citrate
Muscle relaxation
Magnesium Citrate
Highly bioavailable and well tolerated. Helps muscles release the tension a stressed body holds onto all day.
150mg
Elemental
from 750mg malate
Energy and recovery
DiMagnesium Malate
Bound to malic acid, the molecule your cells use to produce energy. Supports steady daytime energy and recovery.
Total elemental magnesium per scoop400mg
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
Before you buy
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.
Here's what you're getting
Everything you need. Nothing you don't.
$56.00$69.99SAVE $13.99
About $0.93 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