Feeling mentally exhausted but unable to turn off a racing mind at night? NOW® Magtein® Calm is a specialized, multi-action relaxation formula engineered specifically for mental calm and nervous system recovery. While standard magnesium supplements primarily target muscle cramps or digestion, Magtein® Calm pairs clinically studied Magtein® (Magnesium L-Threonate) with a synergy of four time-tested neuro-calming nutrients: Ashwagandha, L-Theanine, GABA, and 5-HTP.
Product Highlights at a Glance
✓Brain-Penetrating Magnesium: Contains genuine Magtein® Magnesium L-Threonate, the only magnesium form shown to easily cross the blood-brain barrier.
✓5-in-1 Stress Defense Complex: Combines magnesium with standardized Ashwagandha extract, pure L-Theanine, natural GABA, and Griffonia seed 5-HTP.
✓Calm Without Daytime Grogginess: Helps quiet restless overthinking without knocking you out or leaving a morning brain fog hangover.
✓Clean & Tested: Non-GMO, vegetarian/vegan capsules, free from gluten, soy, dairy, eggs, nuts, and artificial additives.
✓VitaNet® Authenticity Guarantee: Stored in climate-controlled conditions and backed by our trusted 30+ year track record and 100% money-back guarantee.
The Science in Layman Terms: How Magtein® Calm Works Inside the Brain
To understand why conventional magnesium often falls short for stress and anxiety, picture your brain protected by a high-security gatehouse called the blood-brain barrier. This protective filter prevents unwanted substances from entering your brain tissue. Unfortunately, common forms of magnesium (like magnesium oxide or citrate) cannot easily pass through this security gate; they stay in your bloodstream, muscles, or intestinal tract.
Magtein® (Magnesium L-Threonate) was developed by neuroscientists at MIT to solve this exact problem. By binding magnesium to threonic acid (a natural metabolite of vitamin C), the compound acts like a VIP pass, allowing magnesium to enter brain tissue and cerebrospinal fluid directly. Once inside, it increases synaptic density — the connection points your brain cells use to talk to each other — helping regulate healthy nerve signaling.
NOW Foods took this brain-specific magnesium and combined it with four complementary calming agents, creating a multi-pathway relaxation network:
1. Magtein® (1,000 mg)
Raises brain magnesium levels to balance excitatory glutamate signals, encouraging natural neurological calm and sharper mental processing.
2. Ashwagandha Root & Leaf (200 mg)
Acts as your body's "stress thermostat," helping moderate cortisol levels so external pressures don't keep your nervous system in constant fight-or-flight mode.
3. L-Theanine (100 mg)
An amino acid naturally found in green tea that stimulates alpha brain waves — the electrical brain state associated with meditation, relaxation, and calm focus.
4. 5-HTP (100 mg)
Extracted from Griffonia simplicifolia seeds, 5-HTP directly converts into serotonin, your brain's primary neurotransmitter for positive mood and restful nighttime melatonin.
5. GABA (100 mg)
Functions as the central nervous system's chief "brake pedal," helping downshift rapid, overactive thoughts so your brain can enter a peaceful state of relaxation.
Targeted Health Benefits: Why Add Magtein® Calm to Your Routine?
✓ Quelling Racing Thoughts at Night
If you struggle to fall asleep because your mind loops through work deadlines or personal worries, the combination of GABA, L-theanine, and 5-HTP helps ease mental chatter, setting the stage for smoother sleep onset without heavy morning grogginess.
✓ Enhancing Deep & REM Sleep Quality
Recent clinical trials show that magnesium L-threonate supports restorative deep and REM sleep cycles. Waking up refreshed gives you the mental resilience required to handle daytime demands.
✓ Steadying Daily Stress Responses
Chronic tension depletes magnesium and exhausts adrenal function. By combining magnesium with standardized Ashwagandha, Magtein® Calm aids your body in adapting gracefully to high-pressure work and life situations.
✓ Protecting Mental Clarity & Focus
Unlike synthetic tranquilizers or sedatives that blunt cognitive function, Magtein® Calm promotes "alert relaxation." It keeps your thinking sharp, clear, and focused while soothing physical nervousness.
Magnesium Comparison: Why Magtein® L-Threonate Differs from Other Forms
With dozens of magnesium products on the market, choosing the right form is crucial for getting your desired results. Here is how Magtein® L-Threonate stacks up against other popular varieties:
High (Gentle, no laxative effect at standard doses)
Magnesium Glycinate
Minimal (Mainly systemic)
Skeletal muscles, general bodily tension, heart health
High (Very gentle on stomach)
Magnesium Citrate
Very Low
Bowel regularity, mild systemic replenishment
Moderate (Acts as an osmotic laxative)
Magnesium Oxide
Negligible
Antacid, severe constipation relief
Poor (Low absorption ~4%, triggers loose stools)
Complete Supplement Facts & Ingredient Listing
Every batch of NOW® Magtein® Calm (Item # N2399, UPC 733739023995) is manufactured under rigorous cGMP protocols and verified by internal analytical testing:
Supplement Facts
Serving Size: 2 Veg Capsules | Servings Per Container: 30
* Daily Value not established.
Magtein® is protected under global patents and is a registered trademark licensed exclusively by ThreoTech LLC.
Other Ingredients: Hypromellose (cellulose capsule), Ascorbyl Palmitate, Microcrystalline Cellulose, and Silicon Dioxide.
Allergen Free From: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut, or sesame ingredients. Produced in a certified GMP facility that processes other ingredients containing these allergens.
Recommended Use, Timing & Getting the Best Results
Suggested Daily Dosage: Take 2 veg capsules daily with water, preferably late in the afternoon or 1 to 2 hours before bedtime.
Practical Tips for Optimal Calming:
Pair with an Evening Wind-Down: Taking Magtein® Calm 60 to 90 minutes before sleep complements your body's natural circadian wind-down. Dim overhead lights and avoid blue screens to let L-Theanine and 5-HTP work alongside natural melatonin production.
Timeline of Benefits: Ingredients like L-Theanine and GABA begin soothing nervous tension within 30 to 60 minutes. However, raising and stabilizing brain magnesium levels and optimizing cortisol via Ashwagandha build progressively over 2 to 4 weeks of consistent daily use.
Food or Empty Stomach? Magtein® Calm can be taken with or without food. If you have a sensitive stomach, taking it with a light evening snack or a cup of herbal tea is recommended.
Important Safety Information, Cautions & Drug Interactions
As part of our commitment to transparency and consumer safety, review these important contraindications and guidelines before using this dietary supplement:
Antidepressants & Serotonin Medications: This formula contains 5-HTP (100 mg), a direct precursor to serotonin. Do NOT take this product without medical supervision if you are currently taking prescription antidepressants, SSRIs (e.g., fluoxetine, sertraline), SNRIs, MAO inhibitors, or migraine triptans, as excess serotonin levels can lead to a serious condition known as serotonin syndrome.
Thyroid Conditions: This product contains Ashwagandha, which may influence thyroid hormone output. Individuals with Hashimoto's, hyperthyroidism, or those taking prescription thyroid replacement medications (such as levothyroxine) should consult their endocrinologist or physician prior to use.
Gastrointestinal Ulcers: Ashwagandha may irritate sensitive stomach linings in individuals with active peptic ulcer disease.
Pregnancy & Nursing: Not recommended for pregnant or lactating women due to insufficient safety data for 5-HTP and Ashwagandha during pregnancy.
Drowsiness Caution: This formula supports relaxation and may cause mild drowsiness. Avoid operating heavy machinery or driving immediately after consumption until you know how it affects you.
Kidney Function: As with all mineral supplements containing magnesium, individuals with severe kidney disease or impaired renal clearance must consult their nephrologist before supplementing.
Clinical Research & Peer-Reviewed Scientific Citations
We ground our health information in verified scientific literature. The active ingredients in NOW® Magtein® Calm are supported by the following peer-reviewed clinical studies:
1. Magtein® Brain Absorption & Synaptic Density:
Slutsky, I., Abumaria, N., Wu, L. J., Huang, C., Zhang, L., Li, B., Zhao, X., Dahl, A., Wang, R. P., Potts, D. J., Zhou, M., & Tonegawa, S. (2010). Enhancement of learning and memory by elevating brain magnesium. Neuron, 65(2), 165–177.
Key Finding: Demonstrated that Magnesium L-Threonate significantly increases brain cerebrospinal fluid magnesium concentrations, enhancing synaptic plasticity and density where other magnesium salts failed. (PMID: 20152124)
2. Magnesium L-Threonate for Restorative Sleep & Daytime Functioning:
Hausenblas, H. A., Lynch, T., Hooper, S., Shrestha, A., Rosendale, D., & Gu, J. (2024). Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: a randomised controlled trial. Sleep Medicine: X, 8, 100121.
Key Finding: In a double-blind, placebo-controlled human trial using objective sleep tracking (Oura ring), magnesium L-threonate significantly improved deep sleep scores, REM sleep scores, and self-reported morning alertness. (PMID: 39252819)
3. Ashwagandha Root Extract for Stress & Cortisol Reduction:
Chandrasekhar, K., Kapoor, J., & Anishetty, S. (2012). A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. Indian Journal of Psychological Medicine, 34(3), 255–265.
Key Finding: High-concentration ashwagandha extract reduced serum cortisol levels by 27.9% and substantially reduced perceived stress scale scores compared to placebo over 60 days. (PMID: 23439798)
4. L-Theanine and Mental Relaxation without Drowsiness:
Hidese, S., Ogawa, S., Ota, M., Ishida, I., Yasukawa, Z., Ozeki, M., & Kunugi, H. (2019). Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients, 11(10), 2362.
Key Finding: L-Theanine significantly decreased stress-related symptom scores and sleep latency while improving verbal fluency and executive cognitive performance. (PMID: 31623400)
5. GABA and Human Nervous System Relaxation:
Abdou, A. M., Higashiguchi, S., Horie, K., Kim, M., Hatta, H., & Yokogoshi, H. (2006). Relaxation and immunity enhancement effects of gamma-aminobutyric acid (GABA) administration in humans. BioFactors, 26(3), 201–208.
Key Finding: Oral GABA administration significantly enhanced alpha brain waves and suppressed beta brain waves within 60 minutes, indicating genuine central nervous system relaxation. (PMID: 16971751)
Why Choose VitaNet® Online for Your Nutritional Supplements?
Founded in 1995 and based in Hartville, Ohio, VitaNet® LLC is a family-operated health retailer dedicated to delivering high-potency, authentic brand supplements directly to your door. When purchasing sensitive nootropics and brain supplements, sourcing matters:
100% Genuine, Fresh Stock
We buy directly from NOW Foods and authorized distributors. No counterfeit bottles, third-party seller tampering, or expired warehouse leftovers.
Climate-Controlled Storage
Botanicals like Ashwagandha and amino acids like 5-HTP degrade under extreme heat. Our facilities maintain strict climate control to preserve enzyme activity.
12-Month Money-Back Guarantee
We stand behind every bottle. Return any product within 12 months for a 100% refund of the purchase price — and we even pay the return shipping.
1. What is the difference between standard NOW Magtein and NOW Magtein Calm?
Standard NOW Magtein (SKU # N2390) contains only pure Magnesium L-Threonate (2,000 mg yielding 144 mg elemental magnesium per 3 capsules), formulated primarily for cognitive memory, mental focus, and daytime brain function. NOW Magtein Calm (SKU # N2399) combines 1,000 mg of Magtein with four calming co-factors: Ashwagandha, L-Theanine, 5-HTP, and GABA. It is specifically formulated for people looking to relieve mental tension, quiet nighttime worry, and ease into deep, restorative sleep.
2. Will Magtein Calm cause next-morning drowsiness or a "sleeping pill hangover"?
No. Magtein Calm does not contain pharmaceutical sedatives, synthetic hypnotics, or high doses of melatonin. Instead, it provides natural biochemical building blocks (like GABA, L-theanine, and magnesium) that assist your central nervous system in transitioning naturally into rest. Users wake up feeling refreshed and mentally alert rather than sluggish.
3. Can I take Magtein Calm during the daytime for work stress?
While it is formulated primarily for evening use or late in the day, some individuals take 1 capsule in the afternoon to cope with acute mental stress. Because ingredients like 5-HTP and GABA can induce mild drowsiness in sensitive individuals, we recommend starting your first few doses in the evening to observe how your body responds before taking it during working or driving hours.
4. How quickly does Magtein Calm begin working?
You will likely notice an acute sense of relaxation and mental easing within 30 to 60 minutes of taking your dose, thanks to the fast action of L-Theanine and GABA. The deeper, cumulative benefits — such as improved stress tolerance, reduced nighttime wakefulness, and sustained mental clarity — develop over 2 to 4 weeks of consistent daily supplementation as brain magnesium levels optimize.
5. Why does Magtein contain less "elemental" magnesium than other forms?
In Magtein, magnesium is bound to two large threonate molecules. Consequently, 1,000 mg of Magtein yields 72 mg of elemental magnesium. While this number looks smaller on the Supplement Facts panel than a 400 mg magnesium oxide tablet, Magtein's absorption rate across the blood-brain barrier is significantly higher. For targeted neurological and cognitive calm, cellular efficiency in brain tissue matters much more than gross elemental weight in the gut.
6. Can I combine Magtein Calm with prescription antidepressants?
You should NOT take Magtein Calm with prescription antidepressants (such as SSRIs, SNRIs, or MAOIs) without explicit guidance and clearance from your prescribing doctor. The formula contains 100 mg of 5-HTP, which raises serotonin levels. Combining exogenous 5-HTP with serotonergic medications can trigger excessive serotonin accumulation.
7. Is NOW Magtein Calm vegan, gluten-free, and non-GMO?
Yes. NOW Foods packages Magtein Calm in plant-derived hypromellose vegetable capsules. The formula is completely free from gluten, wheat, soy, dairy, egg, fish, shellfish, and tree nuts, and is manufactured in compliance with strict Non-GMO standards.
