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Mineral

Calcium Gluconate

Also known as: Calcium gluconate, Gluconic acid calcium salt, Calcium salt of gluconic acid

A
Evidence

Calcium gluconate is an organic calcium salt with high solubility and bioavailability, used to support bone health, muscle function, and cellular signaling. It is well-established that adequate calcium intake is essential for skeletal integrity and cardiovascular function.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

  • Bone health and mineralization
  • Muscle contraction and function
  • Nerve transmission
  • Cardiovascular health
  • Calcium supplementation

How it works

  • Provides bioavailable calcium for bone matrix formation and maintenance
  • Supports excitation-contraction coupling in muscle tissue
  • Enables calcium-dependent cell signaling pathways
  • Regulates neuromuscular transmission

Dosage

Typical range
500–1200 mg elemental calcium daily (divided doses preferred)
Timing
With meals to enhance absorption; divide into 2–3 doses for optimal uptake
With food
Recommended—food enhances calcium absorption
Duration
Long-term daily use appropriate for bone health maintenance; consistent intake recommended
Special populations
Postmenopausal women, older adults, and those with low dietary calcium intake benefit most; requirements increase with age

Forms

  • Powder· 70/100
  • Capsule· 70/100
  • Tablet· 70/100

Safety

Common side effects

  • Constipation
  • Bloating
  • Gas
  • Mild gastrointestinal discomfort

Contraindications

  • Hypercalcemia or elevated serum calcium
  • Kidney disease (consult physician)
  • Hyperparathyroidism
  • Sarcoidosis or granulomatous disease

Evidence notes

Calcium's role in bone health and general physiology is extensively documented through large RCTs and meta-analyses. Gluconate is a well-absorbed organic form with established bioavailability compared to inorganic salts.

Grade A: Multiple well-designed human trials support the main claims.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.