



Magnesium L-Threonate, 60 caps.
Magnesium L-Threonate is the only magnesium compound clinically demonstrated to raise cerebrospinal fluid magnesium levels. Unlike conventional magnesium forms, this patented compound crosses the blood-brain barrier to increase intraneuronal magnesium concentrations. Because magnesium serves as a cofactor in over 300 enzymatic reactions, adequate brain levels are essential for healthy neurotransmitter synthesis, receptor function, and neuroplasticity. Each 2-capsule dose provides 144 mg of elemental magnesium from 2 grams of Magtein®.
Key Benefits:
- Supports Working Memory and Cognitive Function – Elevated brain magnesium levels are associated with improved synaptic density and neuroplasticity, supporting memory performance in aging adults.
- Promotes Mental Focus and Clarity – By supporting healthy neurotransmitter activity and receptor modulation, this formula helps maintain sustained attention and cognitive sharpness.
- Supports Healthy Sleep Architecture – Adequate brain magnesium levels help regulate the sleep-wake cycle, supporting time spent in deep and REM sleep stages.
- Supports Emotional Balance Under Stress – Magnesium plays a role in modulating the nervous system's stress response, helping maintain a calm, balanced mood during occasional stress.
*See disclaimer below.

Quality Testing

Clinically Researched

High-Quality Ingredients
Practitioner Approved
Suggested Use
Why New Beginnings?
Over 20 Years of Specialized Expertise
Since 2003, New Beginnings Nutritionals has been dedicated to providing specialized, professional-quality supplements for individuals and families navigating complex health challenges. Founded by Dr. William Shaw, Ph.D., a renowned biochemist and toxicologist, our company was born from groundbreaking research and a deep commitment to supporting those with autism, neuropsychiatric disorders, and chronic illness.
Science-Backed Formulations You Can Trust
Our products are developed through collaboration with leading physicians, naturopaths, researchers, and healthcare practitioners. Dr. Shaw's pioneering research—including over 32 published articles and books translated into 12 languages—informs every formula we create. This scientific foundation ensures that each supplement is purposefully designed to address real health needs with proven ingredients.
Personalized Support When You Need It
What truly sets us apart is our commitment to education and customer care. Our knowledgeable team, led by co-founder Lori Knowles-Jimenez and consulting physician Dr. Kurt Woeller, D.O., provides personalized guidance to both practitioners and individuals. We offer educational webinars, evidence-based protocols, and hands-on support to help you navigate your health journey with confidence.
A Comprehensive Solution for Complex Needs
Our diverse product line addresses multiple aspects of health including:
- Digestive and gastrointestinal support
- Immune system function
- Detoxification pathways
- Mitochondrial health
- Neurological wellness
- Special dietary requirements
Your Partner in Achieving Optimal Health
Whether you're a healthcare practitioner seeking reliable supplements for your patients or an individual committed to your wellness journey, New Beginnings Nutritionals provides the quality, expertise, and support you need. We're not just selling supplements—we're partnering with you to achieve optimal health through potent, pure, and efficacious nutrition.
Shipping & Returns
Free Shipping on Qualifying Orders
We offer free shipping on domestic orders over $129 — no code needed.
Most orders placed by 12:30 PM CST Monday–Friday ship the same day. Need it faster? Expedited options including UPS 2nd Day Air and Next Day Air are available at checkout so you can choose the speed that works best for you. International shipping is available via DHL to select countries.
Easy 60-Day Returns
Not the right fit? Unopened products with the original seal intact may be returned within 60 days of purchase. Please note that probiotics, refrigerated items, and sale merchandise are non-returnable. A 10% restocking fee applies, and original shipping charges are non-refundable. Simply include a copy of your invoice with your return.
Damaged Items? Contact us right away with photos of the packaging and product, and we'll make it right.
For full details visit our Shipping and Return Policy.
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New Beginnings Nutritionals has been my ‘go-to’ supplement company for my patients for many years now. The main reasons are their high quality and diverse supplement products, but also their top-notch support staff who can assist with questions, ordering, etc. I highly recommend New Beginnings Nutritionals as supplement distribution company to work with.
Your products have been life changing for my child with a neurodevelopmental disorder. We have been consistently taking your supplements since October. My son has made so many positive changes in behavior, speech, and social skills. Thank you!
Your great supplements and caring staff give me a peace of mind every time I place an order. As a mom life, is always busy so being able to order high quality supplements from one place versus driving from store to store is a huge time-saver. Thank you New Beginning Nutritionals!
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The information you need from the leading experts in the field of integrative medicine. New Beginnings Nutritionals is committed to bringing high-quality educational resources to our customers. Don't miss out on hearing from Dr. Shaw and other thought leaders – view our extensive library of resources.
