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200+ verified 5-star reviews

Magtein® (Magnesium L-threonate) for Sleep

Magtein® (Magnesium L-threonate) for Sleep

Magtein® (magnesium L-threonate) is clinically shown to raise magnesium levels in the brain, supporting calm, deeper sleep, and next-day clarity.

  • Crosses the blood-brain barrier
  • Most effective way to absorb magnesium
  • Calms the nervous system (GABA support)
  • Improves sleep quality + mental clarity
  • Backed by human clinical research
$44.00
15-night supply (only $2.64 / night)
View full details

Not seeing improvements to your sleep, simply email us and we will refund you immediately. No hassle. No need to return the product either.

Anyone over the age of 18 who is not currently pregnant or breastfeeding. Sleepwhale is suitable for a variety of diets and lifestyles.

Magtein (trademark symbol) Magnesium L-Threonate is the only proven magnesium to cross the blood-brain barrier. It bears efficacy, safety, and maintains the best standards out of all the magnesiums we tested. It is the gold standard for sleep and next day cognitive function.

Many magnesium powders and capsules break down during digestion, limiting how much your body actually absorbs. Our encapsulated liposomal delivery protects the magnesium through digestion for enhanced absorption and a gentler experience on the stomach.

Magnesium L-Threonate supports you through the night

Boost sleep quality

Supports balanced sleep cycles

Improve deep and REM sleep

Improve deep and REM sleep

Magnesium L-Threonate supports you through the next day

No grogginess Wake up refreshed

Brain health & cognition

Energy & mood

Memory & Focus

Why Magtein® works when other magnesium doesn’t

Magtein® is magnesium bound to L-threonate, a compound shown to increase brain magnesium levels, where sleep and stress regulation actually happen.

Magtein®

magnesium l-threonate

It’s currently the only form shown in research to increase magnesium levels inside the brain. Higher brain magnesium levels improve neural plasticity, stress response, calm, and cognitive function.

Liposomal Delivery

magnesium l-threonate

Most magnesium powders or capsules lose potency during digestion.

Liposomal delivery protects magnesium through digestion and is gentler on the stomach than standard forms

Magtein® works in harmony with our sleep drops

Magtein® helps quiet the mind at night, while our sleep drops support deeper sleep, so you wake up clear, rested, and ready.

Calm the mind

Calms racing thoughts

  • Helps quiet the nervous system
  • Makes it easier to wind down at night

Better sleep quality

Deeper, more restorative sleep

  • Supports deep and REM sleep
  • Fewer nighttime wake-ups

Next-day clarity and learning

Feel the difference tomorrow

  • Wake up refreshed, not groggy
  • Better focus, mood, and memory

Improved wake-sleep cycle

Retrain your body to sleep and wake more naturally

  • Supports circadian rhythm timing
  • More predictable sleep and wake times
  • Wake feeling rested instead of wired or drained

Sleepwhale delivers deep sleep and next day clarity in one time use packets

We tested every type of magnesium and magnesium l-threonate stood out as the best for sleep and next day clarity. We also tested different ways to take it and landed on liposomal delivery for maximum bioavilability and effectiveness.

Why a packet? A packet is the most effective way to do liposomal delivery because it can’t be a liquid or a powder.

5 star rating

200+ verified 5-star reviews

ZZZ
5 star rating

200+ verified 5-star reviews

"Sleepwhale has been a game changer for me. Not only has it transformed my post workout recovery, but it’s also become my secret weapon for maintaining focus at work"

"Forget melatonin, this natural sleep remedy is the bomb. Woke up feeling ready to conquer the day."

"10/10 and my new favorite sleep hack for when I travel and try to beat jetlag. I wake up refreshed and ready for the adventure."

“Not only did it induce a lovely calming effect, but it also allowed me to wake up feeling refreshed, relaxed, and replenished.

“Works great, use it every night and have felt an increase in quality of sleep.

Frequently Asked Questions

How does your blend help me sleep?

We handpicked ingredients that are purposely made to relax and soothe the mind and body, aiding us into falling asleep quicker. Many of these ingredients bind to receptors in the brain that help us "turn off the lights" while others do the same type of work throughout other parts of the body. Once asleep, we have targeted specific parts of the sleep cycle to maximize our recovery so we can have high quality, restorative sleep.

How quickly does it take to feel the effect?

Because we use a water-soluble formula instead of oil-based (aka every other product), you should feel the effects within 10-15 minutes. Depending on your diet, how close you eat before bed time, you can expect this estimated figure to change and be a bit longer.

What is the serving size and how do I know how much to take?

One serving is 1mL. We recommend to follow directions provided in your shipment - start slowly and work your way up :)

Can I take this every night?

Yes. It is specifically formulated for daily consumption so you can be at your best every day. Our science-backed, all-natural ingredients are specifically chosen to safely support your nighttime routine and goals.

Will this help me fall asleep and stay asleep?

Yes. Our formulation is designed with this in mind, allowing your mind and body to ease into a restful sleep and more importantly, stay asleep throughout the 4 stages of sleep to allow you to recover your mind and body.

What makes you different?

You’ll notice our ingredients are branded and not generic, unlike most of the market. These branded ingredients are backed by millions of dollars in R&D and are known as the best in their respective category. Some even have clinical studies behind them. We deserve to have the best of the best.

Our formula is created to support all 4 stages of the sleep cycle with an emphasis in optimizing the 2 most critical stages of sleep: deep and REM.

Why do you not use melatonin?

By introducing a synthetic hormone that our body naturally produces, we run the risk of disrupting our circadian rhythm (sleep-wake cycle) and waking up groggy. This is not the formula for success.

Will this make me groggy?

No. Our carefully selected ingredients work in harmony to create a smooth and restful sleep that leaves you waking up refreshed. We’re so confident we offer a 30 night risk-free trial.

Have a question that’s not answered here? Please reach out here.

Sleep deep, sleep well.

A good day starts with good sleep.