Calcium
Research Reliability -
A calcium and magnesium complex in malate form that supports bone density, muscle function, and restful sleep.
Appetite
Mood
Sleep
Calcium
Description
This formula combines calcium and magnesium as malate salts, pairing two of the most important structural and functional minerals in the body. Calcium is the primary mineral component of bone and teeth, while magnesium is essential for calcium metabolism, muscle relaxation, and nerve signaling. The malate form is well absorbed and gentle on digestion. Together, they support bone mineral density, reduce nighttime muscle cramps, and contribute to a calm nervous system that promotes quality sleep.
Effects
First weeks
nothing felt
Months
bone density changes register on a DEXA scan
Long term
skeletal maintenance
How it Feels
Calcium is a slow, structural supplement with no felt effect. The magnesium portion may bring mild evening calm. Its real value is measured in bone scans over months and years, not sensation.
Usage
Entry Dose
200mg calcium / 100mg magnesium
Standard Dose
500–1000mg calcium / 250–400mg magnesium
Max Dose
1200mg calcium / 600mg magnesium
Onset
Months (bone density)
Combinations
Pairs well with
Synergistic
Vitamin D3 + K2 — D3 drives calcium absorption; K2 routes it to bone not arteries
Collagen — provides bone matrix protein scaffold for calcium mineralization
Magnesium (internal) — malate form enhances mitochondrial energy alongside bone support
Avoid combining
Contraindicated
Iron supplements — calcium blocks non-heme iron absorption; separate by 2+ hours
Thyroid medication (levothyroxine) — calcium impairs drug absorption; take 4 hours apart
Biomarkers to Track
Subjective
(Daily)
Muscle cramps frequency
Joint comfort and stiffness
Sleep quality score (1–10)
Objective
(Quarterly)
Serum calcium level
RBC magnesium level
Bone density scan (DEXA, annual)
Safe from food-level doses, but high supplemental calcium over years may affect arteries if K2 and D are missing.
People with high blood calcium or a history of calcium kidney stones.
Megadosing calcium in isolation without D, K2, and magnesium to route it correctly.
Strong (human RCTs / meta-analyses)
Benefit is best established for bone density and fracture risk, particularly when paired with adequate vitamin D.
Tang BM et al. (2007). The Lancet. Meta-analysis (calcium/vitamin D and fracture prevention). PMID: 17720017.