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 nothing has worked for your sleep, magnesium might.
Here are the 3 reasons why, and why the right form and dose changes everything.
$69.99
$56.00
Get 20% off your first order →
60-day money-back guarantee. No improvement? Full refund.
Full therapeutic doses
Three bioavailable forms
Third-party tested
GMP-certified USA facility
Next-day Auckland dispatch
Reason 1
Your brain struggles to switch off at night
Sleep starts in the brain. To fall asleep, your nervous system needs to shift into a calm state. That shift relies on GABA, your brain's natural calming signal.
Magnesium supports normal GABA activity. When magnesium is low, that calming signal struggles to come through, and the brain stays alert when it should be winding down.
This often shows up as:
- Racing thoughts at bedtime
- Feeling tired but wired
- Lying awake despite exhaustion
Reason 2
Your stress hormones stay elevated at night
Cortisol is your main stress hormone. It should naturally fall in the evening to allow sleep.
For many people, it doesn't. Magnesium plays a role in the body's normal stress response, and when levels are low, that evening wind-down is harder to reach. Your body sits in a low-level state of alertness long after the lights go out.
This can look like:
- Difficulty falling asleep
- Waking during the night
- Light, unrefreshing sleep
Reason 3
Your body stays tense when it should relax
Sleep is not only mental. It's physical.
Magnesium supports normal muscle and nerve relaxation. When levels are low, your body holds tension it should be releasing.
Low magnesium can contribute to:
- Muscle tightness at night
- Restlessness in bed
- Difficulty fully relaxing
Why the magnesium you tried didn't work
It almost certainly wasn't the magnesium. It was how it was made. Four corners get cut to hit a price, and each one quietly takes the result with it.
Failure 1
Cheap, poorly absorbed forms
Cheaper supplements use forms like magnesium oxide. It looks the same on a label, but your body absorbs less than 4% of it. The other 96% passes straight through.
What we doThree highly bioavailable forms: Magnesium Lysinate Glycinate Chelate, Magnesium Citrate, and DiMagnesium Malate. Each chosen for absorption and the specific job it does in the body.
Failure 2
Underdosed by design
Many supplements deliver a small fraction of what's needed to feel a difference. You take it for weeks, nothing happens, and you assume magnesium doesn't work for you.
What we do400mg of elemental magnesium per scoop. The full therapeutic dose. The amount your body actually needs to feel a difference. No half-measures.
Failure 3
Capsules can't fit a real dose
400mg of elemental magnesium does not physically fit in one capsule. To match it, you'd need to swallow around six capsules every night.
What we doPowder. One scoop, mixed into water before bed. Faster absorption, no handful of pills, and a ritual you'll actually keep up with. One scoop equals six capsules of work.
Failure 4
Cheap raw materials from overseas
Many supplements use raw ingredients sourced from China and packed in New Zealand. Heavy metal contamination thresholds are looser there, and testing standards don't always match what's required at the next stage.
What we doUSA-sourced raw materials. GMP-certified, FDA-regulated facility. Every batch third-party tested for purity and potency before it ships.
Three forms. Three jobs. One scoop.
Most supplements pick one form of magnesium. We use three so the full 400mg dose covers sleep, muscles, and the nervous system at the same time.
100mg
Elemental magnesium
Magnesium Lysinate Glycinate Chelate
CALM AND DEEP SLEEP
Albion-grade. Gentle on digestion. Crosses the blood-brain barrier to calm the nervous system, ease anxiety, and support deep sleep.
150mg
Elemental magnesium
Magnesium Citrate
MUSCLE RELAXATION
Highly bioavailable and well-tolerated. Helps muscles release tension, eases cramps, and supports the daily relaxation your body needs to recover.
150mg
Elemental magnesium
DiMagnesium Malate
ENERGY AND RECOVERY
Bound to malic acid, the molecule your cells use to produce energy. Supports steady daytime energy, muscle recovery, and physical performance.
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 don't feel anything when they take them.
Three forms. Full therapeutic dose. USA-sourced raw materials. 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.
The most reviewed magnesium in New Zealand
Available in 150+ stores nationwide
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.
What to expect with consistent nightly use
Magnesium does not force sleep. It removes the internal friction that makes sleep difficult. Here's the pattern most people report:
Nights 1 to 7
Evenings feel calmer
Less wired at bedtime. Most people feel a meaningful shift in sleep quality within 3 to 7 nights.
Weeks 2 to 3
Falling asleep gets easier
Drifting off comes faster and night waking starts to reduce as your magnesium levels rebuild.
Weeks 2 to 4
Full benefit builds
Sleep feels deeper and mornings feel more refreshed as restored magnesium levels do their job.
Save 20% on your first order
4.8/5 · 934 verified reviews
Biosphere Magnesium
60 servingsTherapeutic doseChelate, citrate and malate
$56.00$69.99Save $13.99
About $0.93 per night. Two months supply. NZD.
Choose flavour
- 400mg elemental magnesium per scoop
- USA-sourced magnesium forms, GMP certified, third-party tested
- Naturally flavoured. No fillers, no artificial sweeteners.
60-day money-back guarantee · Next-day Auckland dispatch
60-day money-back guarantee
The only risk is not trying it.
Take it for 60 nights. If you're not feeling deeper, calmer sleep, get every dollar back. No questions, no hoops to jump through. 64% of customers reorder within 90 days. We're that confident it works.
No questions askedNo need to return the tubRefund processed promptly
Frequently asked questions
How fast will I notice a difference?
Most people feel a meaningful shift in sleep quality within 3 to 7 nights. Falling asleep faster and waking less in the night usually come first. Full benefit builds over 2 to 4 weeks as your magnesium levels restore.
Will it make me drowsy in the morning?
No. Magnesium works with your body's natural sleep cycle, not against it. Unlike sedatives or sleep medications, there's no morning grog. Most customers report waking refreshed and alert.
Is it safe to take with my medications?
If you're on prescribed medication, particularly blood pressure medication, antidepressants, or sedatives, please consult your GP before adding any supplement. Many customers use Biosphere Magnesium alongside their medications with medical supervision.
Can I take it long-term?
Yes. Magnesium is non-habit forming and your body doesn't develop tolerance. 64% of our customers reorder within 90 days, taking it as part of their ongoing nightly routine.
What does it taste like?
Naturally flavoured, sweetened with monk fruit and stevia. No artificial sweeteners, no synthetic flavours. Most customers find it pleasant enough to actually look forward to as a nightly ritual.
Is it vegan and allergen-free?
Yes. Biosphere Magnesium is vegan, gluten-free and dairy-free, with no artificial colours, flavours, fillers, or binders.
Here's what you're getting
Everything you need. Nothing you don't.
$56.00$69.99Save $13.99
About $0.93 per night. NZD.
- 1 tub of Biosphere Magnesium · 60 servings
- 20% off your first order, applied at checkout
- Next-day Auckland dispatch on every order
- 60-day money-back guarantee, no questions asked
