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Cal-Mag DK

4.8
★ ★ ★ ★ ★
(992 ratings)
Calcium 266 mg
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Score84
Calcium citrate, D3, K2, and magnesium provide balanced light bone support. Magnesium oxide and an unspecified K2 form are the main quality gaps.
How scoring works
Capsule
Quantity:180 Capsule(s) • (90 servings)
Goals:

Score 84

Calcium citrate, D3, K2, and magnesium provide balanced light bone support. Magnesium oxide and an unspecified K2 form are the main quality gaps.
How scoring works
$15.10($0.16 per serving)
iHerb
$ 15.91
Vitacost
$ 17.33
Pure Formulas
$ 15.46
Daily Vita
$ 15.10
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Analysis

Two capsules provide 266 mg calcium citrate, 8 mcg vitamin D3, 30 mcg vitamin K2, and 133 mg magnesium. The combination addresses calcium intake and several nutrients involved in bone maintenance.

Calcium citrate and D3 are useful form choices, but magnesium oxide is generally less flexible and may be more likely to affect digestion. The vitamin K2 subtype is not named, which limits comparison with clearly labeled MK-7 or MK-4 products.

Ninety servings make the formula practical for routine use. It fits users seeking moderate, combined bone nutrients rather than high-dose calcium or magnesium replacement.

Who is it for
  • Adults seeking moderate combined bone nutrients
  • People who prefer calcium citrate
  • Users comfortable taking two capsules
Best for
  • Bone-support nutrient combinations
  • Moderate calcium intake
  • Long 90-serving routines

Pros

  • Uses calcium citrate and vitamin D3
  • Includes vitamin K2 and magnesium
  • Provides 90 servings
  • Avoids a proprietary blend

Cons

  • Uses magnesium oxide
  • Does not identify the K2 subtype
  • Calcium and vitamin D amounts are modest

Warnings

  • Vitamin K2 may counter warfarin and related vitamin K antagonists; use requires consistent intake and prescriber guidance.
  • Calcium can reduce absorption of levothyroxine and tetracycline or quinolone antibiotics; separate dosing according to prescriber or pharmacist instructions.

Nutrient quality

84 Highest impact

Calcium citrate and vitamin D3 are favorable forms, while magnesium oxide is less readily absorbed. The coordinated ingredients fit bone support, but magnesium oxide and modest cofactor doses limit quality.

Ingredient transparency

85 Highest impact

Every listed active has a stated amount. No proprietary blend hides the doses, but full directions and inactive ingredients are not supplied.

Customer satisfaction

72 High impact

The supplied average is exceptionally strong, with large response volume. Complaint patterns and purpose-related experiences are not supplied.

Value for money

93 Highest impact

Formula quality appears strong for the asking price. Each serving offers excellent practical value for its useful active dose.

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Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 8 mcg
Vitamin K2
30 mcg
Calcium (Calcium Citrate)
 266 mg
Magnesium (Magnesium Oxide)
 133 mg
Gluten Free Adults 18–50 Dairy Free
Report overview
Calcium (Calcium Citrate) · 266 mg OverallScore87
A- Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyA+ Value

Calcium citrate offers reliable absorption, and the amount is clearly disclosed. The moderate serving supports general supplementation but may require additional servings for higher needs. Low serving cost and the included magnesium and vitamins provide strong practical value.

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85 Performance

Cal/Mag Caps

NaturesPlus
<p>Soy amino acid chelates provide a focused calcium-magnesium formula with balanced doses and strong form quality. Compared with Cal-Mag DK, its calcium form and supporting nutrients may be a better fit where magnesium oxide is a weaker form, and the vitamin K2 amount can matter for people taking warfarin, while good ratings and economical servings support solid value, though the review base is smaller than leading products.</p>
80 Performance

Magnesium & Calcium

NOW
<p>Well-regarded calcium, magnesium, and zinc forms support a broad mineral profile, although magnesium oxide weakens the blend. Compared with Cal-Mag DK, its calcium form and supporting nutrients may be a better fit where magnesium oxide is a weaker form, and the vitamin K2 amount can matter for people taking warfarin, while the listed 800 mg magnesium serving is unusually high and may cause diarrhea or abdominal cramping.</p>
82 Performance

Calcium Citrate

Nature's Way
<p>Citrate and malate improve absorption quality within the mixed calcium formula. Compared with Cal-Mag DK, its calcium form and supporting nutrients may be a better fit where magnesium oxide is a weaker form, and the vitamin K2 amount can matter for people taking warfarin, while active doses are clear, while missing excipient and full use details limit transparency.</p>
85 Budget

Cal/Mag 500 mg/250 mg

NaturesPlus
<p>Chelated calcium and magnesium provide a focused, balanced mineral formula with strong form quality. Its lower recurring cost than Cal-Mag DK makes it a more economical calcium option, while a simple one-serving format and economical cost make it one of the better value profiles in this set.</p>
85 Budget

600+D3

21st Century
<p>Calcium carbonate and vitamin D3 provide a focused bone-support pairing at exceptionally accessible value. Its lower recurring cost than Cal-Mag DK makes it a more economical calcium option, while the calcium amount is reasonably sized, though carbonate works best with food and offers less flexibility than citrate. Calcium should be separated from levothyroxine and tetracycline or quinolone antibiotics because it can reduce their absorption.</p>
85 Budget

Calcium Carbonate

NOW
<p>The pure powder supplies a substantial calcium amount with excellent serving value and no unrelated actives. Its lower recurring cost than Cal-Mag DK makes it a more economical calcium option, while calcium carbonate is less flexible than citrate because food and stomach acid aid absorption.</p>
88 Value

Calcium Hydroxyapatite Caps

NOW
<p>Hydroxyapatite supplies a practical calcium amount with naturally paired phosphorus in a simple capsule. Compared with Cal-Mag DK, its calcium profile offers a practical quality-to-cost trade-off despite not costing less, while clear dosing, strong form quality, and favorable serving value make the formula well suited to routine bone support.</p>
82 Value

Calcium Citrate 600 mg

Spring Valley
<p>A simple calcium product provides a meaningful amount and a long supply at low daily cost. Compared with Cal-Mag DK, its calcium profile and lower recurring cost create a more favorable quality-to-cost balance, while the supplied ingredient details do not confirm the citrate form named in the product title, limiting absorption confidence.</p>
69 Value

Cal/Mag with Whole Foods

NaturesPlus
<p>Aminoate calcium and magnesium provide useful core mineral forms, but an unnamed blend prevents a clear assessment of the complete formula. Compared with Cal-Mag DK, its calcium profile offers a practical quality-to-cost trade-off despite not costing less, while the undisclosed blend also weakens transparency and value despite good customer ratings.</p>
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