FitNeuro | Ultra-Premium Cognitive Support with Magtein® Magnesium L-Threonate

Name: FitNeuro
Brand: Fitties
SKU: BRN-NEUR-C90
Price: 49.00 USD
Availability: InStock

Most magnesium never reaches your brain. Magtein is the only form that does.

$49.00

30 servings | $1.63/serving

*

Magtein magnesium L-threonate, the only magnesium known to reach your brain
Supports cognitive health, memory, and healthy synapse function
Supports a healthy stress response, better sleep, and a balanced mood
Three quality forms of magnesium for brain and body, not the cheap oxide most brands use

FitNeuro is a cognitive support formula built on Magtein magnesium L-threonate, the only magnesium shown to cross the blood-brain barrier, plus two highly absorbable forms for whole-body magnesium.

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Magnesium That Reaches Your Brain
Most magnesium can’t reach your brain. Magtein is the patented L-threonate form, developed at MIT to do exactly that.
Not the Cheap Stuff
Skip the magnesium oxide your body treats like a laxative. FitNeuro uses three forms it can actually absorb.
Built for Your Synapses
Magnesium supports the synapses your brain uses to learn and remember. FitNeuro gets more of it where it counts.
More Than Memory
It also supports a healthy stress response, better sleep, and a steady mood, the base a sharp brain runs on.

Fit female athlete holding bottle of Fitties FitNeuro

Most Magnesium Is the Cheap Kind.

Your brain runs on magnesium, but getting it there is harder than the supplement aisle lets on. Conventional magnesium, even the decent forms, doesn’t meaningfully raise the magnesium level inside your brain. Magnesium L-threonate was engineered specifically to solve that, crossing into the brain and supporting the synaptic connections behind memory and learning. FitNeuro leads with Magtein, the patented, research-backed version, then rounds it out with two highly absorbable forms so the rest of your body, where nearly half of us run low, isn’t left behind.

Who FitNeuro Is For

Built for people who want magnesium that actually does something for their brain.

Who It’s For:
Anyone serious about brain health and cognition who wants magnesium that reaches the brain
People who also want magnesium’s support for stress, sleep, mood, and overall health
Who It’s Not For:
Anyone who just wants basic magnesium for cramps, since this is a premium brain formula
People expecting an instant jolt, since brain magnesium builds with consistent use

What’s Inside

Three forms of magnesium, each chosen for a reason. No cheap oxide making up the weight.

Magtein Magnesium L-Threonate

1g of the patented, MIT-developed L-threonate form, the only magnesium known to cross the blood-brain barrier and reach your neurons. The hero of the formula.

Albion® Di-Magnesium Malate

A highly absorbable magnesium bound to malic acid, far gentler on your gut than oxide and well-absorbed for everyday magnesium status.

TRAACS® Magnesium Lysinate Glycinate Chelate

A chelated magnesium bound to amino acids for easy absorption and a low risk of the GI distress cheaper forms are known for.

Formulated to exclude: wheat, gluten, corn, yeast, soy, animal and dairy products, fish, shellfish, peanuts, tree nuts, egg, sesame, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial sweeteners, and artificial preservatives.

Other ingredients include: capsule (hypromellose and water), hydroxypropyl cellulose, ascorbyl palmitate, and silica.

What to Expect From FitNeuro

Brain magnesium builds slowly, not in a single dose. Here’s the honest version, grounded in the research.

From Day 1
Your magnesium starts climbing from the first dose, including the brain-bound Magtein. Brain magnesium builds gradually, so this is groundwork, not a jolt.
Weeks 4-12
As brain magnesium rises, this is the window magnesium L-threonate’s research focused on for synapse and cognitive support. Steady daily use is the whole point.
Ongoing
Magnesium gets used up daily and most people run low, so the goal is to stay topped up, for your brain and the stress, sleep, and mood magnesium supports.

Fit female athlete catching a bottle of Fitties FitNeuro

How to Use FitNeuro

Take 3 capsules
Once or twice daily, with or without food

Every day. Brain magnesium builds and holds only with consistent use. Many people take it in the evening, since magnesium supports sleep, but any time works.

Pro Tip: For the full studied Magtein dose, work up to two servings, six capsules, a day.

How FitNeuro Compares

Most magnesium supplements are cheap oxide your body barely absorbs and your brain never sees. FitNeuro is three quality forms, including the only one that reaches your brain. Different league.

Magtein L-threonate (crosses into the brain)

Three quality magnesium forms

No cheap magnesium oxide

Supports cognition, stress, sleep, and mood

Vegetarian and allergen-friendly

FitNeuro

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FitNeuro

Typical Magnesium Supplements

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What People Notice About FitNeuro

See what people are saying

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Where FitNeuro Fits Your Stack

FitNeuro covers the brain. Pair it with cellular defense, a foundation, and a little calm.

FitProtect: cellular antioxidant support to protect the brain you’re sharpening.
FitNutrients+: the daily vitamin and mineral foundation under everything.
FitWell: calm and mood support to round out the nervous-system picture.

Find Your Stack

Frequently Asked Questions

What is magnesium L-threonate (Magtein)?

Magnesium L-threonate is a form of magnesium developed through more than a decade of MIT research, sold as Magtein. It’s the only form known to cross the blood-brain barrier, delivering magnesium to brain cells where it supports cognitive function.

Why does the form of magnesium matter?

Forms differ a lot in how well they’re absorbed and where they go. Cheap magnesium oxide is poorly absorbed and can cause GI upset, and no conventional form meaningfully raises brain magnesium. FitNeuro uses three well-absorbed forms, led by Magtein for the brain.

What does FitNeuro do for the brain?

Magnesium supports the synapses your brain uses to learn and remember. By raising brain magnesium with Magtein, FitNeuro supports healthy synapse function and cognitive health.

Does FitNeuro help with stress, sleep, and mood?

Yes. Beyond the brain, magnesium supports a healthy stress response, sleep quality, and a balanced mood. FitNeuro’s magnesium supports these alongside its cognitive benefits.

What are the other two magnesium forms for?

Albion di-magnesium malate and TRAACS magnesium lysinate glycinate chelate are highly absorbable forms that support your overall magnesium status, which matters because nearly half of people don’t get enough from diet.

How much FitNeuro should I take?

Take three capsules once or twice daily, providing 1 to 2g of Magtein and 200 to 400mg of elemental magnesium. Six capsules a day reaches the full studied Magtein dose. Check with your healthcare provider if you take medication.

Will I feel FitNeuro right away?

Brain magnesium builds gradually with consistent use, so FitNeuro isn’t an instant stimulant. Its benefits develop over weeks of daily use rather than from a single dose.

Is FitNeuro vegetarian and allergen-friendly?

FitNeuro is vegetarian (not vegan) and made without gluten, soy, dairy, corn, sesame, GMOs, and artificial additives.

Can I stack Fitties products together?

Yes. All Fitties supplements are formulated with complementary ingredient profiles, so they can be used as part of the same daily routine. If you want a ready-made stack, our curated bundles pair the right products for strength, performance, recovery, and overall health so you don't have to guess.

How are Fitties products tested?

Every Fitties formula is manufactured in an NSF-certified GMP facility and tested for purity, potency, and identity. No low-grade shortcuts. Just ultra-premium, research-backed ingredients, every one listed on the label.

Where are Fitties products manufactured?

Every Fitties formula is manufactured in the USA, at a cGMP-compliant, FDA-registered facility in Orlando, Florida. We don’t outsource quality. We build everything to the highest standard because your health and performance deserve nothing less.

Are Fitties supplements vegan, gluten-free, or allergen-friendly?

Each product is different, and we call out all dietary details clearly on every product page. Many formulas are vegan, gluten-free, dairy-free, or soy-free, and we never use artificial dyes or cheap fillers. If something doesn’t fit your dietary needs, you’ll know upfront.

What Real Users Are Saying

Reviews from athletes and high performers who expect to get what they pay for in their supplements.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.