"My husband has been taking AccuThink for almost 5 months. He has vascular brain issue where he tends to repeat questions. I have seen a reduction in his questions so I'll keep him on this product."
AccuThink
A delicious, doctor-formulated magnesium drink mix, designed for your brain. AccuThink uses MagTein®, the only magnesium proven to cross the blood-brain barrier - plus a gentle dose of Magnesium Citrate - to support focus, memory, and healthy sleep.
For Clarity, Calm and Memory 
Clinically Studied MagTein® 
Delicious Berry-Flavored Drink Mix Choose Options:
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1 Bottle
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3 Bottles
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6 Bottles
BEST VALUE
"My husband has been taking AccuThink for almost 5 months. He has vascular brain issue where he tends to repeat questions. I have seen a reduction in his questions so I'll keep him on this product."
"With AccuThink I have noticed I am less likely to forget words as I am talking to others. It was getting really embarrassing! Not just names of people but actual common words used in conversation. Or nouns…. “What’s it called again?”"
Diane Torrel
Verified Buyer
1-Year Money-Back Purchase Protection
Is Your Brain Starving For Magnesium?
Your brain runs on electrical signals: millions of them, firing through a vast network of neurons.
Those neurons rely on magnesium to transmit signals cleanly, repair daily wear and tear, and maintain the flexibility needed for learning, memory, and sleep regulation. And without enough magnesium, the connections start to fray.
You might feel it as brain fog… trouble focusing… a shorter fuse… a name or word you know you know, but can’t quite grab. Over time, your neural network starts to feel like an old extension cord - glitchy, slow, unreliable.
And the problem isn’t just deficiency. It’s delivery.
Most magnesium supplements - magnesium oxide, citrate, and glycinate - never reach your brain. They’re blocked by the blood-brain barrier, a filter that protects your brain from harmful compounds (but also keeps out many beneficial ones). So even if you’re supplementing, your brain may still be woefully deficient.
That’s when deeper issues emerge: restless sleep, diminished recall, and a creeping sense that your mental edge isn’t what it used to be.
It’s not age. It’s access.
To support cognitive clarity, long-term memory, and deep restorative sleep, your brain doesn’t just need more magnesium - it needs a form that’s proven to get in.
"AccuThink has been very important to me. It helps slow down my stressed racing thoughts when I'm trying to sleep. It also helps take away muscle spasms in my hands, feet, and legs. Those spasms make it very difficult to sleep. I ran out of AccuThink and majorly noticed the difference. Was so glad to get it back! I love this product!"
Diane Vincent
Verified Buyer
AccuThink
Patented Magnesium for the Brain
Most magnesium products flood your body with bulk forms that never reach your brain. AccuThink does the opposite: it uses a precise, bioavailable form that’s proven to cross the blood-brain barrier, and deliver measurable results.
Every scoop is packed with research-backed ingredients for focus, clarity, and deep, restorative sleep.
MagTein® Magnesium L-Threonate
- Increase overall cognitive function by 10.8%
- Improve executive function by 22.1%
- Boost working and episodic memory
- Improve sleep efficiency by 25%, while reducing nighttime waking and anxiety
This is the only magnesium compound that consistently crosses the blood-brain barrier to support memory, attention, and neural plasticity directly at the source.
Magnesium Citrate (80mg)
Natural Mixed Berry Flavor
MagTein® Magnesium L-Threonate
- Increase overall cognitive function by 10.8%
- Improve executive function by 22.1%
- Boost working and episodic memory
- Improve sleep efficiency by 25%, while reducing nighttime waking and anxiety
This is the only magnesium compound that consistently crosses the blood-brain barrier to support memory, attention, and neural plasticity directly at the source.
Magnesium Citrate (80mg)
Natural Mixed Berry Flavor
1-Year Money-Back Purchase Protection
"Very effective. I’ve been taking for a few months mainly for better sleep. But my wife has had insomnia for decades and no sleep aid worked, until I gave her this. Now we both take it for a deep restorative sleep."
Philip Cofer
Verified Buyer
How To Use It
For optimal brain benefits, use consistently. In clinical trials, participants experienced the most significant improvements in cognition and sleep after 8 to 12 weeks of daily use.
For more sleep support, pair Accuthink with our BioLuna sleep supplement. And for improved brain health, make sure to add VitaCell to your daily routine.
How To Use It
For optimal brain benefits, use consistently. In clinical trials, participants experienced the most significant improvements in cognition and sleep after 8 to 12 weeks of daily use.
For more sleep support, pair Accuthink with our BioLuna sleep supplement. And for improved brain health, make sure to add VitaCell to your daily routine.
Perfect For...
Sharper Memory and Recall
Calm Mood, and Stress Resilience
Deep, Restorative Sleep
What to Expect...
AccuThink is designed to restore brain magnesium levels, repairing the neural pathways that support clarity, memory, and restful sleep. With daily use, the benefits build gradually but meaningfully.
Day 7-10
Many users report clearer thinking, fewer “tip-of-the-tongue” moments, and an easier time winding down at night. Mood and mental energy begin to stabilize.
Day 30
Brain magnesium reaches therapeutic levels. Focus becomes more sustained, and memory recall improves, especially with names, appointments, and short-term details. Sleep is deeper, and you wake up more refreshed.
Day 60
Cognitive function continues to sharpen. You may feel more mentally resilient during stress, less reactive to distractions, and more articulate in conversation. Sleep efficiency is noticeably better.
Day 90
MagTein’s full clinical window. Many users report measurable improvements in executive function, short-term memory, and verbal fluency. Your brain simply feels more “on” and capable.
Beyond...
AccuThink becomes a key part of your cognitive routine - helping reinforce memory pathways, support neural plasticity, and maintain a calm, focused mind. It’s a simple daily ritual with compounding benefits for long-term brain health, sharper aging, and better sleep across every stage of life.
Try AccuThink With Confidence
Clinically Proven Magnesium for the Brain
AccuThink delivers MagTein®, the only form of magnesium shown in human studies to cross the blood-brain barrier and improve cognitive function, memory, and sleep. It’s backed by rigorous clinical data, and deliciously formulated for an experience you’ll enjoy, and results you can feel.
Made in The USA
AccuThink is manufactured at a CGMP facility, just outside of Salt Lake City, UT, using domestically and internationally sourced ingredients. Every batch is tested for consistency and purity, so you can rest assured that what’s on the label is what’s in the bottle.
1 Year of Purchase Protection
Whether you buy one bottle or many, one-time or subscription, you’re protected by our 1 year guarantee. Use up your entire order, and if you don’t love it, simply return your empty bottles for a full refund of your purchase price. We make it easy and hassle-free, over phone, email or our self-service website.
Quick Shipping
AccuThink orders are packed every afternoon, M-F, at our midwest warehouse, and sent out via USPS Priority Mail the following day. Most shipments arrive within 4 days of your order. Exact shipping estimates can be found on checkout.
Designed by Dr. Mark Rosenberg
AccuThink was inspired by Dr. Rosenberg’s anti-aging research, and vast experience with anti-aging compounds. It’s a one-of-a-kind formula, with unique ingredients, crafted by one of America’s top anti-aging experts.
Clinically Proven Magnesium for the Brain
AccuThink delivers MagTein®, the only form of magnesium shown in human studies to cross the blood-brain barrier and improve cognitive function, memory, and sleep. It’s backed by rigorous clinical data, and deliciously formulated for an experience you’ll enjoy, and results you can feel.
Made in The USA
AccuThink is manufactured at a CGMP facility, just outside of Salt Lake City, UT, using domestically and internationally sourced ingredients. Every batch is tested for consistency and purity, so you can rest assured that what’s on the label is what’s in the bottle.
1 Year of Purchase Protection
Whether you buy one bottle or many, one-time or subscription, you’re protected by our 1 year guarantee. Use up your entire order, and if you don’t love it, simply return your empty bottles for a full refund of your purchase price. We make it easy and hassle-free, over phone, email or our self-service website.
Quick Shipping
AccuThink orders are packed every afternoon, M-F, at our midwest warehouse, and sent out via USPS Priority Mail the following day. Most shipments arrive within 4 days of your order. Exact shipping estimates can be found on checkout.
Designed by Dr. Mark Rosenberg
AccuThink was inspired by Dr. Rosenberg’s anti-aging research, and vast experience with anti-aging compounds. It’s a one-of-a-kind formula, with unique ingredients, crafted by one of America’s top anti-aging experts.
Radiant Customers Around The World
Frequently
Asked Questions
It's a combination of three highly-bioavailable forms of magnesium. Key ingredients in AccuThink have been clinically proven to cross the blood-brain barrier, where they can help regulate neuronal activity. But it goes beyond the brain - magnesium is involved in over 600 different cellular processes, from DNA growth to muscle contraction!