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Calcific Shoulder & Magnesium: Causes, Symptoms & Tips

Magnesium may support muscle and nerve function in calcific shoulder. Learn about the role this mineral plays in calcium deposits in the shoulder tendons.

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Things worth knowing about "Calcific shoulder magnesium"

Magnesium may support muscle and nerve function in calcific shoulder. Learn about the role this mineral plays in calcium deposits in the shoulder tendons.

What Is Calcific Shoulder?

Calcific shoulder (medically known as tendinosis calcarea or calcific tendinitis) is a condition in which calcium crystals – primarily hydroxyapatite – accumulate in the tendons of the shoulder. The supraspinatus tendon, part of the rotator cuff, is most commonly affected. These deposits can cause significant pain and restricted mobility.

Causes of Calcific Shoulder

The exact cause of calcific shoulder is not yet fully understood. Contributing factors may include:

Reduced blood supply to the tendon, leading to local oxygen deficiency
Overuse and repetitive microtrauma to the shoulder tendons
Metabolic disorders and hormonal changes
Mineral imbalances, potentially including magnesium deficiency
Genetic predisposition

The Role of Magnesium in Calcific Shoulder

Magnesium is an essential mineral involved in more than 300 enzymatic reactions in the body. In the context of calcific shoulder, magnesium is discussed for several reasons:

Regulation of Calcium Metabolism

Magnesium and calcium are closely interrelated. Magnesium inhibits excessive calcium deposition in soft tissues by acting as a natural calcium antagonist. A magnesium deficiency may contribute to increased calcium storage in tendons and other soft tissues, rather than calcium being retained in bone or excreted by the kidneys.

Muscle and Tendon Health

Magnesium plays a key role in muscle relaxation and normal tendon function. Adequate magnesium levels can help reduce muscular tension that places additional strain on the affected shoulder tendons.

Anti-Inflammatory Properties

Studies suggest that magnesium possesses anti-inflammatory properties. Since calcific shoulder is often associated with local inflammatory reactions, sufficient magnesium intake may help to dampen inflammatory processes in the shoulder region.

Symptoms of Calcific Shoulder

Symptoms can vary considerably depending on the stage of the condition:

Sharp or dull pain in the shoulder, often worsening at night
Restricted range of motion, particularly when lifting the arm
Tenderness in the shoulder area
In acute phases: sudden onset of very intense pain

Diagnosis

Calcific shoulder is diagnosed through:

X-ray: visualization of calcium deposits
Ultrasound: assessment of tendon structure and deposits
MRI (magnetic resonance imaging): detailed imaging of soft tissues
Blood tests: including measurement of magnesium and other mineral levels

Treatment and Magnesium Supplementation

The treatment of calcific shoulder is multifaceted, encompassing both conservative and surgical approaches:

Conservative Therapy

Physiotherapy and targeted exercises
Anti-inflammatory medications (NSAIDs)
Extracorporeal shock wave therapy (ESWT)
Cooling and rest during acute phases

Magnesium as a Complementary Measure

Targeted magnesium supplementation may be considered as a complementary measure, particularly when a magnesium deficiency is present. The World Health Organization (WHO) and national nutritional authorities recommend a daily magnesium intake of approximately 300–420 mg for adults, depending on age and sex. Foods rich in magnesium include:

Nuts and seeds (e.g., pumpkin seeds, almonds)
Legumes (e.g., beans, lentils)
Whole grain products
Green leafy vegetables (e.g., spinach)
Dark chocolate

Before taking magnesium supplements, consultation with a healthcare professional is advised, as excessive intake can cause side effects such as diarrhea.

Surgical Therapy

If conservative measures are insufficient, arthroscopic removal of the calcium deposits may be considered.

References

Rowe CR. "Calcific tendinitis" – in: Instructional Course Lectures, American Academy of Orthopaedic Surgeons, 1995.
Konrad M et al. – "The Benefits of Magnesium in Clinical Practice" – Nutrients, PubMed, 2021. DOI: 10.3390/nu13051136
World Health Organization (WHO) – Calcium and Magnesium in Drinking Water: Public Health Significance. WHO Press, Geneva, 2009.

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