Home Ingredients Calcium Citrate Malate (CCM)
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Calcium Citrate Malate (CCM)

Evidence Level
Strong
2 Clinical Trials
5 Documented Benefits
4/5 Evidence Score

Calcium citrate malate (CCM) is a specific compound salt of calcium with both citrate and malate anions — distinguished by highest consistent bioavailability among calcium forms (>35% in human studies, sometimes 42%). Used in branded calcium supplements (Citracal Plus®) and calcium-fortified beverages (orange juice). Premium evidence-based calcium form; cost intermediate between carbonate and bisglycinate.

Studied Dose 1,000-1,200 mg elemental calcium/day in divided doses; 500-600 mg per dose maximum
Active Compound Calcium citrate malate (compound salt — not physical blend)

Benefits

Highest Consistent Bioavailability

CCM has shown 35-42% bioavailability in multiple human studies — consistently higher than other calcium forms across diverse populations and methodologies. Distinguished from simple calcium citrate or calcium malate by being a specific compound salt (not physical blend) with unique solubility characteristics.

Supported by Trial 2

Bone Mineral Density in Adolescents (Foundational Trial)

Lloyd et al. 1993 JAMA — adolescent girls receiving CCM had significantly higher peak bone mass accumulation vs placebo. Important developmental trial. Johnston et al. 1992 NEJM showed similar BMD increases in children.

Supported by Trial 1

Postmenopausal Bone Health

Multiple RCTs in postmenopausal women show CCM + vitamin D modestly reduces bone loss vs placebo. Effect sizes modest; foundational evidence for calcium + vitamin D combination.

Supported by Trial 1, Trial 2

Acid-Independent Absorption

Like calcium citrate, CCM does not require stomach acid for dissolution — works in PPI users, elderly, post-bariatric surgery.

Supported by Trial 1, Trial 2

Beverage Fortification

CCM is the calcium form used in calcium-fortified orange juice (Tropicana Pure Premium with calcium, etc.) and other fortified beverages — providing well-absorbed dietary calcium.

Supported by Trial 1, Trial 2

Mechanism of action

1

Compound Salt vs Physical Blend

CCM is not a simple physical mixture of calcium citrate + calcium malate — it is a specific compound salt (e.g., hexa-calcium dicitrate trimalate) with unique X-ray diffraction pattern, higher solubility, and distinct dissolution kinetics from the individual salts.

2

Enhanced Solubility

CCM has higher aqueous solubility than either calcium citrate or calcium malate alone — basis for superior bioavailability.

3

Citrate + Malate Synergy

Both citrate and malate can chelate calcium and enhance solubility. The compound salt structure maximizes calcium availability across the GI tract.

4

Standard Calcium Functions

Once absorbed, calcium serves bone mineralization (hydroxyapatite), muscle contraction, neurotransmitter release, blood clotting, and signaling — same as calcium from any source.

Clinical trials

1
CCM for Adolescent Bone Mass

Clinical trial of CCM (~500 mg elemental calcium/day) vs placebo in 94 healthy adolescent girls for 18 months. Outcomes: bone mineral density.

94 adolescent girls aged 11-12.

CCM significantly increased BMD vs placebo. Important developmental data — peak bone mass attained in adolescence influences osteoporosis risk decades later. Foundational trial for adolescent calcium fortification.

2
CCM for Pediatric Bone Mass

Clinical trial of CCM (1,000 mg elemental calcium/day) vs placebo in 71 pairs of identical twins for 3 years.

Pre-pubertal and pubertal twins.

CCM-supplemented twins had significantly higher BMD increase vs placebo twins, particularly in pre-pubertal subgroup. Twin design controls genetic factors. Strong evidence for calcium adequacy during growth.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
Less constipation than calcium carbonate.
Mild GI distress at high doses.
Larger pills due to lower elemental calcium content (~26%).
Same general calcium cautions as other forms.

Important Drug interactions

Same general calcium drug interactions — tetracyclines, quinolones, bisphosphonates, levothyroxine, iron; separate by 2-4 hours.
Aluminum-containing drugs — citrate enhances aluminum absorption; caution in CKD/dialysis.
Thiazide diuretics — hypercalcemia risk.

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Frequently asked questions about Calcium Citrate Malate (CCM)

What is calcium citrate malate (CCM)?

Calcium citrate malate is a highly absorbable calcium form combining citric and malic acids. It is well studied for bone health and absorbs well with or without food, which is why it is used in many fortified juices and beverages.

Is calcium citrate malate well absorbed?

Yes, CCM is among the better-absorbed calcium forms, with research supporting its use for bone density. Its solubility makes it popular in fortified drinks and in bone-health supplements.

How much calcium citrate malate should I take?

Use it to fill the gap to a 1,000 to 1,200 mg daily calcium total from all sources, keeping single doses near 500 mg of elemental calcium for best absorption. Check the label for elemental calcium content.

Is calcium citrate malate good for bones?

CCM has specific research supporting bone density, especially when paired with vitamin D, making it a well-regarded choice for bone health. As always, pair it with adequate vitamin D and, ideally, vitamin K2.

What is Calcium Citrate Malate?

Calcium citrate malate (CCM) is a specific compound salt of calcium with both citrate and malate anions — distinguished by highest consistent bioavailability among calcium forms (>35% in human studies, sometimes 42%). Used in branded calcium supplements (Citracal Plus®) and calcium-fortified beverages (orange juice).

What is Calcium Citrate Malate used for?

Calcium Citrate Malate is researched primarily for Bone Health. CCM has shown 35-42% bioavailability in multiple human studies — consistently higher than other calcium forms across diverse populations and methodologies.

What is the recommended dosage of Calcium Citrate Malate?

The clinically studied dose is 1,000-1,200 mg elemental calcium/day in divided doses; 500-600 mg per dose maximum Always follow the product label and check with a healthcare provider for personal advice.

Is Calcium Citrate Malate safe, and does it have side effects?

For most healthy adults, Calcium Citrate Malate is well tolerated at studied doses. Reported effects can include: Generally well-tolerated. Less constipation than calcium carbonate. It may also interact with some medications. Calcium Citrate Malate is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Calcium Citrate Malate interact with any medications?

Possible interactions include: Same general calcium drug interactions — tetracyclines, quinolones, bisphosphonates, levothyroxine, iron; separate by 2-4 hours. Aluminum-containing drugs — citrate enhances aluminum absorption; caution in CKD/dialysis. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Calcium Citrate Malate?

NutraSmarts rates the evidence for Calcium Citrate Malate as Strong (4 out of 5). It is backed by 2 clinical trials and 4 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(4 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Andon MB, Peacock M, Kanerva RL, De Castro JA Calcium absorption from apple and orange juice fortified with calcium citrate malate (CCM). Journal of the American College of Nutrition. 1996;15(3):313-6. doi: 10.1080/07315724.1996.10718604.PubMedUsed to support: Directly demonstrates the bioavailability of CCM, the calcium salt this page covers: absorption from CCM-fortified apple and orange juice was measured at 36-42% via stable-isotope methods. Supports the claim that CCM is well absorbed, though this is a small single-dose pharmacokinetic study and does not measure bone outcomes.
  2. Smith KT, Heaney RP, Flora L, Hinders SM Calcium absorption from a new calcium delivery system (CCM). Calcified Tissue International. 1987;41(6):351-2. doi: 10.1007/BF02556676.PubMedUsed to support: Early CCM-specific absorption study (Heaney group) reporting favorable fractional calcium absorption from the then-new CCM delivery system. Backs the 'good bioavailability' claim, but it is a very brief, small early-era report and the absorption edge over carbonate is modest in absolute terms.
  3. Dawson-Hughes B, Dallal GE, Krall EA, Sadowski L, Sahyoun N, Tannenbaum S A controlled trial of the effect of calcium supplementation on bone density in postmenopausal women. The New England Journal of Medicine. 1990;323(13):878-83. doi: 10.1056/NEJM199009273231305.PubMedUsed to support: Landmark 2-year RCT in 301 postmenopausal women in which calcium citrate malate was one of the supplemental salts; CCM prevented spinal bone loss in late-postmenopausal women with low baseline calcium intake and was more effective than calcium carbonate at the dose tested. Supports CCM's bone-density benefit, though the absolute advantage over carbonate was modest and limited to a subgroup.
  4. Reinwald S, Weaver CM, Kester JJ The health benefits of calcium citrate malate: a review of the supporting science. Advances in Food and Nutrition Research. 2008;54:219-346. doi: 10.1016/S1043-4526(07)00006-X.PubMedUsed to support: Comprehensive CCM-specific review summarizing bioavailability and bone-health evidence across life stages (children, adults, postmenopausal women). Useful as an evidence overview, but note authors include industry-affiliated scientists (Procter & Gamble developed CCM), so it should be read as a sympathetic synthesis rather than an independent meta-analysis.