14 of the best calcium supplements in 2023

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This article looks at the best calcium supplements, who may need them, how to choose, and when to speak to a doctor.

Factors such as age, diet, and underlying medical conditions can affect how much calcium a person’s body absorbs.

Calcium is an essential nutrient for strong, healthy bones and teeth. Although a person may be able to get the calcium they need from their diet, some people need extra support from a calcium supplement.

Medical News Today chooses products that meet the following criteria:

Please note that the writer of this article has not tried these products. All information presented is purely research-based and correct at the time of publication.

Medical News Today follows a strict product selection and vetting process. Learn more here.

• Price: $10
• Form: Capsule
• Strength: 480 milligrams (mg) (37% Daily Value [DV])
• Product size: 60 capsules (30 day supply)
• Dosage: 2 capsules daily
• Price per dose:

  $0.

  33

• Additional vitamins/minerals: Vitamin D, vitamin K2

Care/of offers personalized vitamin and mineral recommendations, which customers can subscribe to or purchase one time.

Read our review of Care/of here.

The calcium in Care/of Calcium Plus supplements is sustainably derived from red algae in Iceland, making it suitable for vegans and those who are lactose intolerant.

Learn about the most important supplements for vegans here.

Care/of claims that algae naturally contains magnesium and other trace minerals.

According to a 2017 review, there is evidence to suggest that taking vitamin K and D together is more effective than taking vitamin D alone. Additionally, vitamin D helps the body absorb more calcium.

The manufacturer recommends taking these supplements separately from iron supplements, which may affect absorption.

This product is free from:

• egg
• fish
• milk
• peanuts
• shellfish
• soy
• tree nuts
• wheat

Best high strength:

Garden of Life Raw Calcium

• Price:

  $20.99-35.25

• Form:

  Capsules

• Strength: 1,100 mg (85% DV)
• Product size: 60-120 tablets (15-30 day supply)
• Dosage: 4 capsules daily, taken 2 at a time
• Price per dose:

  $0.

  29-0.35

• Additional vitamins/minerals: Magnesium, vitamin D3, vitamin K, vitamin C

These supplements have 1,100 mg of calcium per serving, a higher dosage than many similar supplements. It also contains 40 mg of vitamin D.

The calcium is derived from algae. This supplement is made with a raw probiotic and enzyme blend, which Garden of Life claims may aid digestion.

These capsules are suitable for vegans and free from synthetic binders or fillers, artificial flavors, sweeteners, additives, gluten, and GMOs.

Garden of Life recommends taking two capsules with breakfast and two with lunch. They also state that people can open capsules and pour the contents into water or juice.

Best subscription:

Persona Nutrition Calcium Citrate

• Price:

  $0.09 a day

• Form: Tablet
• Strength: 200 mg (15% DV)
• Product size: Varies.
• Dosage: 1 tablet daily
• Price per dose:

  $0.09

• Additional vitamins/minerals: N/A

Persona provides personalized vitamins and minerals via subscription. Customers take a short online assessment to discuss their lifestyle, diet, and other factors. A doctor-designed algorithm then creates a personal supplement plan with vitamin recommendations.

Calcium citrate is the only form the American Society for Metabolic and Bariatric Surgery recommends after bariatric surgery. A 2020 study notes that The European Guideline suggests a person gets 1,200-1,500 mg of calcium from diet or supplements after bariatric surgery to minimize the risk of kidney stones.

According to the manufacturer, calcium citrate may also suit those with low stomach acid to maintain healthy bones and fill nutrition gaps.

This supplement is suitable for vegans and free from the following allergens:

• wheat
• soy
• lactose
• corn
• egg
• fish
• shellfish
• tree nuts
• peanuts
• gluten

A person can take one tablet daily with or without food.

Read our review of Persona here.

Best for purity:

HUM Got Calcium

• Price:

  $15

• Form: Tablet
• Strength: 630 mg (48% DV)
• Product size: 60 tablets (30 day supply)
• Dosage: 2 tablets daily
• Price per dose:

  $0.

  50

• Additional vitamins/minerals: Vitamin D3

HUM formulates claims it manufactures supplements using carefully sourced and tested ingredients to ensure potency and effectiveness. All ingredients are verified clean and have clinically tested actives. HUM triple-tests its products.

HUM Got Calcium supplements are vegan and free from artificial colors, flavors, sweeteners or preservatives. They do not contain:

• milk
• eggs
• fish
• tree nuts
• wheat
• soy

These tablets contain 630 mg of calcium and 10 mg of vitamin D3.

Best personalized:

Nurish by Nature Made

• Price:

  $4-5.56

• Form: Tablet
• Strength: 500-600 mg (38-46%)
• Product size: 30 tablets (30 day supply)
• Dosage: 1 tablet daily
• Price per dose:

  $0.

  13-0.18

• Additional vitamins/minerals: Vitamin D3

Nurish sells a 30-day supply of calcium supplements in either 500 mg or 600 mg strengths. The 500 mg is available for $4.44 for a one-time purchase or $4 for a monthly subscription. The 600 mg version is available for $5.56 for a one-time purchase or $5 monthly.

These supplements are lower cost than many competitors. Customers take a quiz to receive personalized vitamin and mineral recommendations.

Learn more about personalized vitamins here.

Nurish’s calcium is derived from limestone. They contain additional vitamin D3 to improve calcium absorption.

These supplements are gluten-free and have no artificial flavors or added colors. They are not suitable for people with milk, shellfish, or wheat allergies.

If someone is unsure whether or not they need to take calcium supplements, Nurish provides an online assessment that provides personalized recommendations.

People should take one tablet daily with water and a meal.

Best low strength:

Megafood Calcium & Magnesium

• Price:

  $22.09-32.99

• Form:

  Tablet

• Strength: 100 mg (8% DV)
• Product size: 60-90 tablets (30-45 day supply)
• Dosage: 2 tablets daily
• Price per dose:

  $0.

  36-0.43

• Additional vitamins/minerals: Magnesium

These tablets may suit people looking for a low dose calcium supplement or a calcium and magnesium multimineral supplement. They contain 100 mg of calcium and 50 mg of magnesium to help support muscle function.

Learn about the best magnesium supplements here.

Other ingredients include 60 mg of a mineral herb blend containing organic nettle leaf, organic dandelion root, and organic parsley leaf.

These tablets may be taken anytime throughout the day, though Megafood recommends taking 2-3 hours before or after any other multivitamins.

Customers can choose between 30 or 45-day supplies, with 60 or 90 tablets, respectively. One-time purchases are available alongside subscription options.

Best for vegans:

Standard Process Calcium Lactate

• Price:

  $26-56.50

• Form:

  Tablets

• Strength: 260 mg (20% DV)
• Product size: 90-360 tablets (30-120 day supply)
• Dosage: 3 tablets daily
• Price per dose:

  $0.16-0.29

• Additional vitamins/minerals: Magnesium

A small 2021 study found that, in comparison to omnivores, vegan participants generally exhibited lower bone health based on the measurement of nutritional and bone-related biomarkers, including calcium intake.

Many plant-based sources of calcium are available, including leafy green vegetables and legumes. However, some vegans may wish to supplement dietary intake of calcium with a supplement.

Learn about plant-based sources of calcium here.

This supplement is suitable for vegans and free from dairy, gluten, grains, and soy.

Standard Process recommends taking three tablets daily. Each serving contains 20% of a person’s daily calcium needs and 12% of a person’s magnesium needs.

Learn more about avoiding deficiencies on a vegan diet here.

Best for vitamin D:

Life Extension Calcium Citrate

• Price:

  $16

• Form:

  Capsules

• Strength: 200 mg (16% DV)
• Product size: 200 capsules (200-day supply)
• Dosage: 1 capsule daily, one to four times daily.
• Price per dose:

  $0.16-0.29

• Additional vitamins/minerals: Vitamin D3

Life Extension offers calcium capsules with 200 mg of calcium and 100 IU of vitamin D3, which may suit people looking for a supplement that balances calcium and vitamin D content.

These capsules are vegetarian and free from gluten and GMOs. They contain 200 mg of calcium per capsule.

Life Extension recommends taking one capsule with a meal and drink, one to four times a day. People may wish to start with a single capsule and gradually increase.

Best for allergies:

Pure Encapsulations Calcium Citrate

• Price:

  $27.65

• Form:

  Capsules

• Strength: 300 mg (23% DV)
• Product size: 180 capsules (90-day supply)
• Dosage: 2 capsules daily
• Price per dose:

  $0.14

• Additional vitamins/minerals: Vitamin D3

These supplements are free from many common allergens and additives, making them suitable for people with allergies or intolerances.

These supplements are suitable for vegans and free from common allergens, including:

• wheat
• gluten
• soy
• dairy
• eggs
• tree nuts
• peanuts

They also do not contain GMOs, shellac, coatings, additional binders, fillers, or preservatives, trans fats, magnesium stearate, and artificial colors, flavors, or sweeteners.

The calcium is derived from limestone, and the citrate is from corn dextrose fermentation. The citrate makes the calcium easier for a person to digest.

Each serving contains 300 mg of calcium, equal to 23% of a person’s daily recommended allowance. Pure Encapsulations recommends taking 2 capsules with or between meals.

Best calcium gummies:

Nature Made Calcium

• Price:

  $17.39

• Form:

  Capsules

• Strength: 500 mg (38% DV)
• Product size: 80 gummies (40-day supply)
• Dosage: 2 gummies daily
• Price per dose:

  $0.21

• Additional vitamins/minerals: Vitamin D3, phosphorous

Gummy supplements may suit people who find swallowing tablets or capsules difficult.

These gummies have cherry, orange, and strawberry flavors and are gluten-free. However, they are not suitable for vegetarians or vegans.

These gummies are also free from synthetic dyes, artificial flavors, high fructose corn syrup, and artificial sweeteners.

Nature Made recommend consuming 2 gummies daily. As with all supplements, they should be kept out of reach of children.

Nature Made also sells a range of calcium supplements in tablet form here.

Best bulk buy:

Kirkland Signature Calcium

• Price:

  $15.90

• Form:

  Tablet

• Strength: 600 mg (46%)
• Product size: 500 tablets (500-day supply)
• Dosage: 1 tablet daily
• Price per dose:

  $0.

  03

• Additional vitamins/minerals: Vitamin D2

Kirkland offers calcium tablets at a lower cost than many similar brands, with a higher quantity of capsules per product. This may suit people looking for an affordable bulk buy option.

These tablets provide 600 mg of calcium and 10 mg of Vitamin D per tablet.

Best multivitamin:

Thorne Research Oscap

• Price:

  $20.90

• Form:

  Capsules

• Strength: 300 mg (23%)
• Product size: 120 tablets (60-day supply)
• Dosage: 2 capsules daily daily
• Price per dose:

  $0.17

• Additional vitamins/minerals: Vitamins B12, B6, and D, magnesium, folate, boron

This product contains several vitamins and minerals that Thorne claims may support bone health, including:

• calcium
• vitamin B12
• vitamin B6
• vitamin D
• folate
• magnesium

These capsules are free from gluten, dairy, soy, and artificial flavors.

The manufacturers suggest taking 2 capsules twice daily.

Best calcium powder:

NOW Supplements Calcium Carbonate Powder

• Price:

  $11.99

• Form:

  Powder

• Strength: 600 mg (46%)
• Product size: 12 ounces (oz) / 340 grams (g) (200-day supply)
• Dosage: 1/2 level teaspoon daily
• Price per dose:

  $0.

  77

• Additional vitamins/minerals: N/A

This product contains pure calcium carbonate powder. Because this calcium supplement comes in powder form, a person can customize the dosage according to their needs.

The manufacturers recommend mixing the powder into pulpy juices, such as orange or tomato juice, and taking it with a meal.

Half a level teaspoon (tsp) provides 600 mg of calcium. Each bottle contains around 200 servings.

This product is suitable for Kosher and vegan diets. It is free from:

• dairy
• egg
• gluten
• GMO’s
• nuts
• soy

A calcium citrate version is also available here.

• Price:

  $41.32

• Form:

  Capsules

• Strength: 200 mg (16%)
• Product size: 180 capsules (90-day supply)
• Dosage: 2 capsules daily
• Price per dose:

  $0.23

• Additional vitamins/minerals: Magnesium

This may be a suitable option for people looking to supplement both calcium and magnesium.

This supplement contains dicalcium malate and magnesium malate, compounds of calcium or magnesium and malic acid. According to the manufacturers, this form of calcium is easier to absorb than calcium alone.

Two capsules provide 200 mg of calcium and 200 mg of magnesium. A person’s recommended daily values for each mineral equate to 16% and 48%, respectively.

This product is suitable for vegetarians and free from gluten, dairy, soy, and GMOs.