Magnesium is hailed as a “miracle mineral” and plays a pivotal role in the human body, participating in over 300 essential metabolic reactions. Although many natural foods (such as leafy green vegetables, legumes, nuts, and seeds) contain magnesium, research surveys show that approximately two-thirds of people cannot meet their magnesium requirements through diet alone.
Regarding magnesium supplements, the specific form significantly affects absorption rates and the intended purpose of use. Here, we introduce 11 different forms of magnesium and their applications.
Table of Contents
- Magnesium Citrate
- Magnesium Oxide
- Magnesium Chloride
- Magnesium Lactate
- Magnesium Malate
- Magnesium Taurate
- Magnesium L-threonate
- Magnesium Sulfate
- Magnesium Glycinate
- Magnesium Orotate
- Liposomal / Sucrosomial® Magnesium
1. Magnesium Citrate
Magnesium citrate is a form of magnesium bound with citric acid, containing approximately 16% elemental magnesium. Citric acid is naturally found in citrus fruits and gives them their tart flavor.
Magnesium citrate is one of the most common forms found in supplements. Additionally, due to its natural laxative effect, it is used in higher doses as a saline laxative. It works by increasing fluid levels in the small intestine to promote bowel movements, typically inducing a bowel movement within 30 minutes to 3 hours.
- Summary: It is one of the most common raw materials for magnesium supplements and is easily digested. It is mainly used to increase magnesium levels and promote regular bowel movements.
2. Magnesium Oxide
Magnesium oxide is a compound of magnesium and oxygen. Sources include chemical synthesis or natural “marine magnesium” derived from the ocean. It appears as a white powder and is often added to supplements in powder, capsule, or tablet form. While it has a high elemental magnesium content (about 60%), studies show its absorption rate is very low (potentially only 4%). Therefore, it is usually not the first choice for correcting a magnesium deficiency.
Conversely, because it is poorly absorbed and inexpensive, it is commonly used in medicine as a stool softener. A single tablet often contains a 250mg dose; please consult a physician before use.
- Summary: Magnesium oxide helps with bowel movements. However, due to its low absorption rate, it is not an ideal choice for those needing to raise their internal magnesium levels.
3. Magnesium Chloride
Magnesium chloride is a magnesium salt containing chlorine, with a magnesium content of about 12%. Chlorine is an unstable element that easily binds with others like sodium and magnesium to form salts.
It is a versatile supplement that is easily soluble in water. It is most commonly taken in capsule or tablet form but is also used as an ingredient in topical products like lotions or ointments.
- Summary: Magnesium chloride helps with bowel movements and can be used as an ingredient in nutritional supplements.
4. Magnesium Lactate
Magnesium lactate is the salt formed by combining magnesium with lactic acid, containing about 12% magnesium. Lactic acid is produced by muscles and blood cells in the human body and is often used as a food preservative and flavoring agent. It is frequently used as a food additive to regulate acidity and fortify foods/beverages, but it is less common as a standalone supplement.
The human body absorbs magnesium lactate well, and it is a relatively gentle form compared to others. It is a suitable alternative for those who need high doses of magnesium long-term or those who do not tolerate other supplements well.
- Summary: Magnesium lactate can be used as an ingredient in nutritional supplements.
5. Magnesium Malate
Magnesium malate contains malic acid and has a magnesium content of about 15%. Malic acid occurs naturally in fruits and wine and is used in food to add flavor or acidity. Research indicates that magnesium malate has a good absorption rate in the human body, making it a solid choice for supplementation.
Some believe this form is gentler and less likely to cause diarrhea as a side effect compared to other types.
- Summary: Good absorption rate and may be less likely to cause diarrhea.
6. Magnesium Taurate
Magnesium taurate contains taurine, an important amino acid, with a magnesium content of about 8–10%. Research suggests that adequate intake of taurine and magnesium plays a key role in regulating blood sugar. Therefore, this type may help maintain healthy physiological functions, though more clinical research is needed to confirm these specific effects.
- Summary: May offer other health benefits, but more research is required to verify its efficacy.
7. Magnesium L-threonate
Magnesium L-threonate (magnesium content approx. 7–8%) is formed by combining magnesium with threonic acid, a water-soluble substance resulting from the metabolic breakdown of Vitamin C.
This form is easily absorbed. Animal studies suggest it is one of the most effective types for promoting brain health, potentially helping with conditions such as depression, Alzheimer’s disease, and age-related memory decline. However, as of now, this form has not yet been approved as a food ingredient in Taiwan and cannot be used there.
- Summary: May help maintain brain health, but requires more research support.
8. Magnesium Sulfate
Composed of magnesium, sulfur, and oxygen, this is commonly known as Epsom Salt (magnesium content approx. 10%). It is a white substance with a texture similar to table salt.
While it can be taken in capsules or dissolved in water to treat constipation, it has a very bitter taste. Excessive or frequent use can be risky. It is most commonly dissolved in bathwater to soothe the body. Current research has not yet confirmed if magnesium sulfate can be effectively absorbed through the skin.
- Summary: Commonly used in baths to soothe the body. High-quality research is still needed to support its therapeutic efficacy.
9. Magnesium Glycinate
Magnesium glycinate is formed from elemental magnesium and the amino acid glycine. Glycine is used by the body to synthesize proteins and is found in protein-rich foods like fish, meat, and dairy. Since amino acids are easily absorbed by the body, this combination significantly increases the magnesium absorption rate. While highly absorbable, its magnesium concentration is only about 11–12%, meaning a higher dosage/volume is required for those with significant deficiencies.
Animal studies show it can help with sleep and other health benefits. It is often used for its calming effect to help improve the state of a busy or stressed mind and body.
- Summary: Often used for its sedative effects and to aid sleep.
10. Magnesium Orotate
Magnesium orotate contains orotic acid (magnesium content approx. 6–7%). It is easily absorbed and does not cause significant side effects like other forms. In Europe and the US, it is used in supplements, with some research suggesting it may assist in athletic performance.
- Summary: May help with exercise performance, though current research remains limited.
11. Liposomal / Sucrosomial® Magnesium
Liposomal and Sucrosomial® forms are currently considered the top-tier forms in terms of absorption rates according to research.
A Liposome is a tiny vesicle composed of a phospholipid bilayer that can encapsulate active substances (like nutrients) and effectively deliver them to target cells. This technology, originally used in pharmaceuticals, has expanded to food and skincare.
The Italian patented mineral supplier PharmaNutra has developed a liposome-like form called SideMag®. Its patented Sucrosomial® form significantly increases absorption—reaching 220% of the absorption rate of standard magnesium oxide—while maintaining high concentration. It is considered the most perfect source of magnesium.
Key features of PharmaNutra’s Sucrosomial® technology include:
- Enhanced Bioavailability: By protecting the active ingredient, the Sucrosomial® structure wraps the mineral core in a bilayer membrane of phospholipids and sucrose esters. This stable structure significantly boosts absorption efficiency.
- Increased Tolerance & Reduced Discomfort: Traditional mineral supplements often cause gastrointestinal side effects. The Sucrosomial® protective layer reduces this irritation, making it ideal for those with sensitive systems.
- Improved Mineral Stability: The technology protects the active ingredients from being destroyed by stomach acid and digestion, ensuring they remain stable throughout the digestive process.