First order?Save 20%
(888) 510-7196

Magnesium Threonate & Magnesium Forms Explained

Explore Magnesium threonate and other Magnesium forms for nervous system health, bone density, and muscle cramps. Learn about key ingredients and benefits.

Understanding Magnesium

What Is Magnesium and Why Does It Matter?

Magnesium is the fourth most abundant cation in the human body and a critical cofactor in hundreds of enzymatic reactions that regulate energy metabolism, neuromuscular function, cardiovascular health, bone integrity, immune defense, and psychological well-being. It is naturally present in many foods, available as a dietary supplement, and present in some medicines such as antacids and laxatives.

Nature's Sunshine Magnesium provides nervous system support and assists in a variety of bodily functions. Used by several hundred enzymes in their daily tasks, Magnesium is found in the bones, soft tissues, and blood. It helps metabolize various nutrients such as vitamin C, Phosphorus, potassium, and sodium. Calcium and Magnesium are nutritional partners and work best when taken together.

When shopping for Magnesium supplements, you'll encounter many different forms — and Magnesium threonate is one that has gained particular attention. Magnesium L-threonate has gained attention for its potential cognitive benefits, attributed to its ability to cross the blood–brain barrier, though more research is needed to fully understand its efficacy in this context. Other common forms include Magnesium oxide, Magnesium citrate, Magnesium glycinate, and Magnesium amino acid chelate, each with its own absorption profile and strengths.

Nature's Sunshine Magnesium comes in 250 mg capsules of Magnesium oxide and Magnesium amino acid chelate in a base of Licorice root, Kelp plant, Peppermint leaves, and White willow bark. Whether you're exploring Magnesium threonate for brain health or a broader-spectrum Magnesium formula for whole-body support, understanding the differences between forms can help you make the best choice. If you're unsure which form is right for you, our naturopath offers free consultations to help guide your decision.

Forms Compared

Magnesium Threonate vs. Other Magnesium Forms

Magnesium supplements are broadly categorized into organic and inorganic compounds. Organic forms, such as Magnesium citrate, glycinate, lactate, or malate, involve Magnesium chelated to organic molecules like amino acids or organic acids. These forms are generally more soluble and have higher bioavailability. Inorganic forms, such as Magnesium oxide, sulphate, and chloride, are bound to inorganic salts and tend to have lower solubility and absorption rates.

Magnesium threonate stands out among organic forms because of its unique association with cognitive support. Research interest in Magnesium threonate centers on its potential ability to cross the blood–brain barrier, though more research is needed to fully understand its efficacy. For those specifically seeking nervous system and cognitive support, Magnesium threonate is worth exploring.

Other notable forms include:

  • Magnesium citrate — one of the most bioavailable forms with high solubility in water, leading to efficient absorption.
  • Magnesium glycinate (bisglycinate) — often recommended for individuals with sensitive digestive systems, as it tends to cause fewer gastrointestinal side effects.
  • Magnesium oxide — the most concentrated form by weight but has lower bioavailability compared to organic salts. It was virtually insoluble in water and only 43% soluble in simulated peak acid secretion.
  • Magnesium amino acid chelate — Magnesium chelated with amino acids, which may be absorbed via the dipeptide transporter pathway.

This Nature's Sunshine formula combines Magnesium oxide and Magnesium amino acid chelate to deliver 250 mg of Magnesium per tablet, paired with a supportive herbal base for comprehensive whole-body benefits.

Who Benefits

Who Is This Formula For?

This Magnesium formula is designed for adults seeking support for nervous system health, bone density, and muscle cramps — three areas where Magnesium plays a well-documented role. Whether you've been researching Magnesium threonate for cognitive and nervous system benefits or looking for broader musculoskeletal support, a comprehensive Magnesium supplement may be a helpful foundation.

Emerging evidence confirms that nearly two-thirds of the population in the western world is not achieving the recommended daily allowance for Magnesium, a deficiency problem contributing to various health conditions. Men older than 70 and teenage girls are most likely to have low intakes. As we age, Magnesium absorption and retention can decrease, leading to deficiency and health consequences.

Certain groups of people are more likely than others to have Magnesium inadequacy, including older adults (due to decreased absorption), individuals with gastrointestinal disorders, those with type 2 diabetes, people with alcohol dependence, and individuals on certain long-term medications such as diuretics and proton pump inhibitors.

This formula also includes Calcium, Phosphorus, and a base of traditional herbs — making it a thoughtful choice for anyone wanting multi-faceted mineral support. If you're unsure whether your current Magnesium intake is adequate or which form suits your needs, our naturopath is available for a free consultation.

What's inside

Key Ingredients

Magnesium — 250 mg
Magnesium is an essential mineral and cofactor in more than 300 enzyme systems that regulate protein synthesis, muscle and nerve function, blood glucose control, and blood pressure. It is required for energy production, oxidative phosphorylation, and glycolysis — making it indispensable for cellular energy generation across virtually all tissues. Research suggests that Magnesium supports bone density: observational data from large cohort studies found higher Magnesium intake associated with 2–3% greater bone density in women, and clinical trials including the COMB study suggest supplementation may attenuate bone loss. For the nervous system, Magnesium acts as a natural NMDA receptor antagonist, modulating synaptic transmission and neuronal excitability; deficiency is associated with increased risk of neurological symptoms. Regarding muscle cramps, Magnesium deficiency impairs muscle relaxation — muscles contract normally but struggle to fully release when levels are low. Research also supports Magnesium's role in muscle recovery: it suppresses pro-inflammatory cytokines (IL-6, TNF-α) relevant to exercise recovery, and a 2024 systematic review found supplementation reduced muscle soreness and improved recovery in physically active individuals. Additionally, Magnesium is essential for electrolyte balance as a primary intracellular electrolyte required for sodium-potassium ATPase function — foundational to all electrolyte transport.
Calcium — 40 mg
Calcium is the most abundant mineral in the human body, with more than 99% stored in bone as hydroxyapatite. It provides skeletal strength and serves as a reservoir for Calcium to be released into the serum. Research suggests Calcium supports bone density: meta-analyses of RCTs demonstrate that Calcium supplementation significantly improves bone mineral density, particularly in people under 35 building peak bone mass. Combined with vitamin D, it may attenuate bone loss in older adults. Calcium is also essential for muscle contraction and relaxation, operating via calmodulin-dependent activation pathways; hypocalcemia is recognized as a cause of muscle cramps, tetany, and spasms in standard medical references. As one of the seven primary electrolytes, Calcium regulates neuromuscular excitability, and its intracellular signal in nerve cells is part of the neurotransmission mechanism — stabilizing membrane potential and controlling the excitability of neurons.
Phosphorus — 30 mg
Phosphorus is the second most abundant mineral in the human body, with approximately 85% residing in bones and teeth as hydroxyapatite. Together with Calcium, it forms the mineral matrix that provides bones and teeth with structural integrity and strength. Phosphorus helps activate enzymes, keeps blood pH within a normal range, and regulates the normal function of nerves and muscles, including the heart. It is also a building block of DNA, RNA, and ATP — the body's major source of energy. Phospholipids containing Phosphorus are the primary components of neuronal cell membranes and are required for synaptic neurotransmission. Research suggests adequate Phosphorus intake alongside Calcium is essential for bone formation and is among current recommendations for osteoporosis prevention nutrients. Phosphorus deficiency, though rare in the U.S., can cause muscle weakness, bone pain, and coordination problems.
Kelp leaf and stem
Kelp is a form of brown seaweed belonging to the order Laminariales and is used as a food and source of vitamins and minerals. It is a rich source of dietary iodine — an essential trace element required for the biosynthesis of thyroid hormones (T3 and T4), which regulate energy production, growth, and cellular repair. Kelp has a long history of medicinal use: traditional Chinese medicine used Kelp to treat glandular problems as far back as 300 BC, and Pacific Northwest Indigenous peoples used various species of Kelp to treat headaches and other ailments. The main groups of biologically active compounds in Kelp include polysaccharides (alginic acid, laminarin, fucoidan) and minerals (iodine compounds, Magnesium, potassium, Calcium, iron).
Licorice root
Licorice root (Glycyrrhiza glabra) has been used worldwide as a medicine and flavoring agent for over 4,000 years. It appears in approximately 60% of traditional Chinese medicine prescriptions and has been traditionally used for coughing, asthma, wound healing, and diseases of the lungs, liver, and arteries. The main constituent is glycyrrhizin, a triterpenoid saponin that is almost 50 times sweeter than sucrose. Licorice root has traditionally been used in herbal medicine to treat gastrointestinal problems such as gastritis and peptic ulcers, and it is still commonly recommended for respiratory infections, coughs, and bronchitis. The German Commission E approves the use of licorice for catarrhal conditions of the upper respiratory tract.
Peppermint leaves
Peppermint (Mentha × piperita) is a hybrid mint indigenous to Europe and the Middle East, with a history of medicinal use dating back to ancient Egyptian times — dried Peppermint leaves were found in Egyptian pyramids dating to 1000 B.C. The main constituents of Peppermint oil are menthol (approximately 40.7%) and menthone (approximately 23.4%). Peppermint contains L-menthol, which blocks Calcium channels in smooth muscle, producing antispasmodic effects on the gastrointestinal tract. The ancient Greeks and Romans valued Peppermint as a stomach soother, and the German Commission E approved Peppermint leaf for spastic complaints of the gastrointestinal tract as well as the gall bladder and bile ducts.
White willow bark
White willow (Salix alba) is a deciduous tree native to Europe and western Asia. Its bark has been used as a painkiller and antipyretic for more than 3,500 years by Sumerians, Egyptians, and then by physicians from ancient Greece and Rome. The seminal Greek physician Hippocrates reportedly prescribed willow bark and leaves for fever and the pain of childbirth. The characteristic constituents are derivatives of salicin — a prodrug that is metabolized to salicylic acid. Traditionally used for muscle pain (myalgia) across European, Native American, and Chinese herbal traditions, White willow bark has been historically employed for muscle soreness and general analgesic and anti-inflammatory purposes. The multi-component active principle of willow bark provides a broader mechanism of action than synthetic aspirin and, in contrast to synthetic aspirin, does not damage the gastrointestinal mucosa.
Magnesium
Magnesium
★★★★★ 4.7 (46 reviews)
  • ✓ Free shipping over $75
  • ✓ 90-day easy returns
  • ✓ Ships within hours
Magnesium
Magnesium
$23.80
Usage Guidelines

How to Take This Magnesium Supplement

Take 1 tablet daily with a meal. Each tablet provides 250 mg of Magnesium along with 40 mg of Calcium, 30 mg of Phosphorus, and a supportive herbal base of Licorice root, Kelp plant, Peppermint leaves, and White willow bark.

Calcium and Magnesium are nutritional partners and work best when taken together — this formula conveniently includes both minerals in a single tablet. For best absorption, taking your tablet with food helps your body utilize these minerals more effectively.

If you have questions about how this formula fits into your daily routine, or whether you might benefit from additional Magnesium threonate supplementation for cognitive support, our naturopath is happy to provide a free consultation.

About the author

Written by Greg Howlett

GH

Greg Howlett

Founder

Greg has spent over a decade helping customers choose the right natural-health products. He personally vets every formula we carry and writes these guides to cut through the marketing noise with practical, experience-based advice.

FAQ

Frequently asked questions

What is the difference between Magnesium threonate and the Magnesium in this formula?

Magnesium L-threonate has gained attention for its potential cognitive benefits, attributed to its ability to cross the blood–brain barrier, though more research is needed to fully understand its efficacy. This Nature's Sunshine formula uses Magnesium oxide and Magnesium amino acid chelate — forms designed for broad whole-body support including nervous system health, bone density, and muscle cramps. The best form for you depends on your individual health goals, and our naturopath can help you determine the right fit through a free consultation.

How many enzymes does Magnesium support in the body?

Magnesium is a cofactor in more than 300 enzyme systems that regulate diverse biochemical reactions in the body, including protein synthesis, muscle and nerve function, blood glucose control, and blood pressure regulation. It is also required for energy production, oxidative phosphorylation, and glycolysis.

How common is Magnesium deficiency?

Emerging evidence confirms that nearly two-thirds of the population in the western world is not achieving the recommended daily allowance for Magnesium. It is estimated that between 56 and 68% of Americans do not obtain enough Magnesium in their diet on a daily basis. Men older than 70 and teenage girls are most likely to have low intakes. Early signs of deficiency include loss of appetite, nausea, vomiting, fatigue, and weakness. As deficiency worsens, numbness, tingling, muscle cramps, seizures, and abnormal heart rhythms can occur.

Why are Calcium and Magnesium included together in this formula?

Calcium and Magnesium are nutritional partners and work best when taken together. Both minerals play essential roles in bone health, muscle function, and nerve signaling. Magnesium influences osteoblast and osteoclast activity and affects concentrations of both parathyroid hormone and vitamin D — major regulators of bone homeostasis. Their complementary roles make a combined formula an efficient way to support the musculoskeletal and nervous systems.

Can Magnesium supplements cause side effects?

Magnesium supplements can cause nausea, cramps, and diarrhea, particularly at higher doses. Side effects are generally more common with inorganic forms such as Magnesium oxide. Extra Magnesium from food is considered safe because the kidneys eliminate excess amounts in urine. If you take medications such as diuretics, proton pump inhibitors, bisphosphonates, or certain antibiotics, it's important to be aware of potential interactions. Our naturopath can help you navigate these considerations.

What role does Magnesium play in muscle cramps and relaxation?

Magnesium deficiency impairs muscle relaxation — muscles contract normally but struggle to fully release when Magnesium levels are low. Magnesium is an essential mineral cofactor for ATP synthesis, muscle contraction, and electrolyte homeostasis. This formula is designed to support healthy muscle function as a muscle relaxant, and also promotes proper elimination and boosts energy production.

Talk to an expert

Talk to Dr. Shannyn Fowl

Not sure if this is right for you? Book a free, no-pressure consultation for personalized guidance on your health goals.

Book your free consult →
Who we are

About Caring Sunshine

A family-run reseller of premium supplements — free shipping, a 90-day guarantee, and real people who know the products.

Learn more about us →