SuppHelper
search
Home›Supplements›Mineral›Calcium›Calcium/Magnesium Kirkman
Product Image

Calcium/Magnesium

Kirkman
4.9
★ ★ ★ ★ ★
(75 ratings)
Calcium 300 mg
Magnesium 150 mg
Product Image
Score 70

A calcium and magnesium supplement with a 2:1 ratio, featuring a good mix of calcium forms and some highly absorbable magnesium glycinate, but compromised by less bioavailable magnesium oxide and low Vitamin D3.

scaleQuantity:120 Capsule(s) • (60 servings)
track_changesGoals:
flag Cardiovascular Support
flag General Health
flag Heart Health
flag Mood Support
flag Sleep Support
flag Stress Relief
flag Bone Health
flag Digestive Health

leaderboard Score 70

A calcium and magnesium supplement with a 2:1 ratio, featuring a good mix of calcium forms and some highly absorbable magnesium glycinate, but compromised by less bioavailable magnesium oxide and low Vitamin D3.

insightsAnalysis

This supplement offers a 2:1 ratio of calcium (600mg) to magnesium (300mg), combining calcium carbonate and citrate. For magnesium, it includes magnesium glycinate, a highly absorbable and gentle form, alongside magnesium oxide, which is less bioavailable. The product also contains a minimal amount of Vitamin D3 (3mcg).

It's a balanced option for individuals looking for foundational mineral support, especially those who appreciate the benefits of magnesium glycinate for relaxation and nerve function. However, the effectiveness of the magnesium blend is somewhat reduced by the oxide, and the very low Vitamin D3 means additional D supplementation would likely be necessary for optimal calcium absorption.

thumb_upPros
  • Provides a balanced 2:1 calcium to magnesium ratio.
  • Includes highly absorbable magnesium glycinate, beneficial for relaxation.
  • Mixes calcium carbonate and citrate for broad calcium delivery.
  • Contains Vitamin D3, even if in a low amount.
thumb_downCons
  • Includes magnesium oxide, which is less bioavailable and can dilute the benefits of magnesium glycinate.
  • Very low Vitamin D3 dose provides minimal support for calcium absorption.
  • Calcium carbonate is generally less bioavailable than citrate.
  • Moderate review count suggests less widespread adoption compared to some competitors.
warningWarnings
  • For optimal calcium absorption, consider a separate Vitamin D supplement or a product with a higher D content.
  • Magnesium oxide can sometimes cause digestive upset or have a laxative effect.
  • As with any supplement, consulting a healthcare professional is advisable, especially if you have pre-existing health conditions or are taking other medications.
flagReport analysis
$26.50($0.44 per serving)
iHerb
$ 26.50
flagReport prices
track_changesGoals
flagHeart Health
Impact
High effect
Magnesium glycinate is excellent for supporting heart rhythm and muscle function, with calcium also playing a key role, providing good cardiovascular support despite the oxide inclusion.
View goal →
flagCardiovascular Support
Impact
High effect
Magnesium glycinate is effective for regulating blood pressure and heart function, while calcium is vital for cardiac muscle activity, offering good cardiovascular support, though the oxide dilutes it.
View goal →
flagGeneral Health
Impact
High effect
Provides essential calcium and magnesium in a mixed blend, along with a low dose of Vitamin D3, supporting various physiological processes for overall well-being.
View goal →
flagMood Support
Impact
High effect
Magnesium glycinate is particularly noted for its calming effects on the nervous system, which can be beneficial for supporting a stable and balanced mood.
View goal →
flagSleep Support
Impact
High effect
Magnesium glycinate is well-known for its ability to promote relaxation and calmness, making it a good choice for contributing to more restful and quality sleep.
View goal →
flagStress Relief
Impact
High effect
Magnesium glycinate helps to calm the nervous system and relax muscles, making it a valuable nutrient for supporting the body's response to occasional stress and tension.
View goal →
flagBone Health
Impact
High effect
The calcium blend and magnesium provide foundational support for bone health, but the mixed forms and very low Vitamin D3 limit its overall effectiveness for robust bone density compared to more comprehensive options.
View goal →
flagDigestive Health
Impact
High effect
Magnesium glycinate is typically gentle on the stomach, but the presence of magnesium oxide might cause mild digestive upset in some individuals.
View goal →
scienceIngredients
IngredientAmount per serving
Vitamin D3
3 mcg
Calcium
300 mg
Magnesium
150 mg
grain_off Gluten Free person Adults 18–50 free_breakfast Dairy Free
flagReport overview
Calcium 75
The blend of calcium carbonate and citrate provides a decent amount of calcium, balancing content with some absorbability, though not exclusively in the most bioavailable forms.
scienceView ingredientinventory_2View products
Magnesium 70
Magnesium glycinate is an excellent, highly bioavailable form; however, its inclusion alongside less absorbable magnesium oxide significantly reduces the overall quality of the magnesium component.
scienceView ingredientinventory_2View products
inventory_2Alternative products
70 Value

Cal/Mag Plus with Vitamin D and Vitamin K2 MK-7

Metabolic Maintenance
4.7
★★★★★
(352 ratings)
This product offers highly absorbable forms of calcium (citrate, malate) and magnesium (aspartate, citrate), paired with Vitamin D3 and K2 for comprehensive bone health support, all at a significantly lower price per serving than the original.
Other sellers (2)
82 Value

Calcium Magnesium Zinc With L-Glutamic Acid 1000 mg : 500 mg : 50 mg

Country Life
4.8
★★★★★
(5853 ratings)
This option combines calcium and magnesium in both carbonate and citrate forms, adding zinc for broader mineral support. It provides a good nutritional profile at a more accessible price point, offering a solid blend for overall well-being.
Other sellers (2)
78 Value

Cal-Mag Citrate with Vitamin D-3 & K-2 2:1 Ratio

Solaray
4.7
★★★★★
(1680 ratings)
This product provides excellent citrate forms of both calcium and magnesium, and crucially includes both Vitamin D3 and K2, which are essential for calcium utilization and bone density. While at a slightly higher price point, it offers a complete synergistic blend.
Other sellers (3)
89 Performance

Organic Plant Calcium

Garden of Life MyKind Organics
4.8
★★★★★
(5374 ratings)
This plant-based option provides calcium and magnesium from organic algae, along with essential cofactors like Vitamin D and K2. This combination may contribute to bone density and overall mineral balance more comprehensively than simpler forms.
Other sellers (3)
89 Performance

Bone Solid

Country Life
4.6
★★★★★
(769 ratings)
This is a robust option that goes beyond basic calcium and magnesium. It includes various forms of these minerals, plus a wide array of vitamins like D, K, and C, and trace minerals like zinc and manganese, all chosen to support bone health and broader well-being.
Other sellers (2)
88 Performance

Bone Restore with Vitamin K2

Life Extension
4.7
★★★★★
(9986 ratings)
This formula focuses on bone health with highly bioavailable forms of calcium and includes crucial cofactors like Vitamin D3 and K2. The addition of zinc, manganese, silicon, and boron further supports a comprehensive approach to mineral absorption and bone density.
Other sellers (4)
78 Budget

Calcium 500+D3

21st Century
4.8
★★★★★
(5228 ratings)
This offers a remarkably economical way to obtain calcium and Vitamin D3, supporting bone health at a very low cost. It's a simple, foundational supplement for essential mineral intake.
Other sellers (2)
88 Budget

Calcium 500 mg with Vitamin D3

Nature's Bounty
4.8
★★★★★
(1232 ratings)
Providing calcium from oyster shell along with Vitamin D3, this option delivers strong bone support at a highly affordable price point, making it an excellent budget-friendly choice.
Other sellers (1)
55 Budget

Calcium Magnesium Zinc + D3

21st Century
4.7
★★★★★
(110315 ratings)
This alternative provides a blend of calcium, magnesium, Vitamin D3, and zinc at a significantly lower cost. It's a practical option for comprehensive mineral support without a high price tag.
Other sellers (2)
70 Value

Cal/Mag Plus with Vitamin D and Vitamin K2 MK-7

Metabolic Maintenance
4.7
★★★★★
(352 ratings)
This product offers highly absorbable forms of calcium (citrate, malate) and magnesium (aspartate, citrate), paired with Vitamin D3 and K2 for comprehensive bone health support, all at a significantly lower price per serving than the original.
Other sellers (2)
82 Value

Calcium Magnesium Zinc With L-Glutamic Acid 1000 mg : 500 mg : 50 mg

Country Life
4.8
★★★★★
(5853 ratings)
This option combines calcium and magnesium in both carbonate and citrate forms, adding zinc for broader mineral support. It provides a good nutritional profile at a more accessible price point, offering a solid blend for overall well-being.
Other sellers (2)
78 Value

Cal-Mag Citrate with Vitamin D-3 & K-2 2:1 Ratio

Solaray
4.7
★★★★★
(1680 ratings)
This product provides excellent citrate forms of both calcium and magnesium, and crucially includes both Vitamin D3 and K2, which are essential for calcium utilization and bone density. While at a slightly higher price point, it offers a complete synergistic blend.
Other sellers (3)
89 Performance

Organic Plant Calcium

Garden of Life MyKind Organics
4.8
★★★★★
(5374 ratings)
This plant-based option provides calcium and magnesium from organic algae, along with essential cofactors like Vitamin D and K2. This combination may contribute to bone density and overall mineral balance more comprehensively than simpler forms.
Other sellers (3)
89 Performance

Bone Solid

Country Life
4.6
★★★★★
(769 ratings)
This is a robust option that goes beyond basic calcium and magnesium. It includes various forms of these minerals, plus a wide array of vitamins like D, K, and C, and trace minerals like zinc and manganese, all chosen to support bone health and broader well-being.
Other sellers (2)
88 Performance

Bone Restore with Vitamin K2

Life Extension
4.7
★★★★★
(9986 ratings)
This formula focuses on bone health with highly bioavailable forms of calcium and includes crucial cofactors like Vitamin D3 and K2. The addition of zinc, manganese, silicon, and boron further supports a comprehensive approach to mineral absorption and bone density.
Other sellers (4)
flagReport alternatives

SuppHelper

Compare supplements smarter. Science-backed, user-rated, updated daily.

Explore

  • Compare Supplements
  • Health Goals
  • Stacks

Legal

  • Privacy Policy
  • Terms of Use
  • Medical Disclaimer

Stay in the Loop

Medical disclaimer: Information on SuppHelper is for educational purposes only and is not medical advice. Statements on this site about dietary supplements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before using supplements. Read full disclaimer

© 2025 SuppHelper. All rights reserved.