7 Best Calcium Supplements for 2024

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The best calcium supplements for bones, teeth, and muscle health provide easy-to-absorb calcium at affordable prices. This article discusses calcium requirements, absorption, and the best options to try.
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A quick look at the best calcium supplements
Best calcium supplement for osteoporosis: Care/of Calcium Plus | Skip to review
Care/of Calcium Plus
Skip to review
Best calcium gummies: Nature Made Calcium with D3 Gummies | Skip to review
Nature Made Calcium with D3 Gummies
Skip to review
Best powder calcium: NOW Supplements Calcium Carbonate Powder | Skip to review
NOW Supplements Calcium Carbonate Powder
Skip to review
Best calcium and vitamin D supplement: HUM Got Calcium | Skip to review
HUM Got Calcium
Skip to review
Best low strength: MegaFood Calcium & Magnesium | Skip to review
MegaFood Calcium & Magnesium
Skip to review
Best calcium supplement for kids: Renzo’s Hercules Calcium | Skip to review
Renzo’s Hercules Calcium
Skip to review
Best calcium citrate supplement: Persona Nutrition Calcium Citrate | Skip to review
Persona Nutrition Calcium Citrate
Skip to review
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.
essential
Factors such as age, diet, and underlying medical conditions can affect how much calcium a person’s body absorbs.
calcium
This article examines the best calcium supplements and discusses who may need them, how to choose, and when to contact a doctor.
Health benefits of calcium supplements
Calcium is a mineral that plays an important role in many key bodily functions, including:
important role
building strong bones and teeth
strong bones
teeth
transmitting nerve signals
supporting muscle function
muscle function
secreting hormones
supporting blood clotting
blood clotting
helping blood vessels expand and contract
expand
preventing or reducing the risk of cancer, metabolic syndrome, obesity, and preeclampsia
cancer
metabolic syndrome
obesity
preeclampsia
People can get their daily recommended amount of calcium by eating a balanced diet.
However, in the United States, 49% of children ages 4–18 years and 39% of people ages 4 and older consume less than the estimated average requirement (EAR) from their diet. So, people may need to supplement their calcium intake because calcium deficiency may lead to reduced bone strength and osteoporosis.
49%
Postmenopausal females, people who avoid dairy products, those who take corticosteroids long term, and people who have premenstrual syndrome (PMS) may also benefit from calcium supplements. Plus, people who are lactose intolerant or allergic to milk have a higher risk of calcium deficiency and may also benefit from taking calcium supplements.
Postmenopausal
corticosteroids
premenstrual syndrome (PMS)
lactose intolerant
According to the National Institutes of Health (NIH), postmenopausal females lose about 1% of their bone mineral density yearly. This can lead to decreased bone mass and fragile bones. In the United States, 30% of postmenopausal women have osteoporosis, with 40% of those developing fracture fragility. Taking calcium supplements may prevent this.
National Institutes of Health (NIH)
osteoporosis
People taking long-term corticosteroids may also benefit from taking calcium supplements with vitamin D. A 2022 study recommends that people in this category take between 1,200–2,000 mg of calcium and 800–1,000 IU per day of vitamin D supplements to prevent bone loss.
2022 study
Several studies have shown that people who have lower serum calcium levels are more likely to have PMS and that taking calcium supplements can significantly improve PMS as well as associated symptoms of bloating, food cravings, pain, and mood swings.
studies
bloating
food cravings
mood swings
Read more about the benefits of calcium.
the benefits of calcium
What are the side effects of calcium supplements?
Calcium supplements may cause adverse effects such as bloating, gas, or constipation for some people. Taking too much calcium may also lead to:
constipation
kidney stones
kidney stones
soft tissue calcification
calcification
renal insufficiency
renal insufficiency
According to the NIH, some evidence suggests that high calcium intake may contribute to prostate cancer and cardiovascular disease. However, studies looking at these risks have had mixed results.
NIH
prostate cancer
cardiovascular disease
Calcium supplements can interact with other medications, including:
osteoporosis medications, such as bisphosphonates
osteoporosis medications
bisphosphonates
certain antibiotics, such as tetracycline or fluoroquinolone
antibiotics
anticonvulsant medications, such as phenytoin
anticonvulsant medications
thyroid medications, such as levothyroxine
levothyroxine
medications for Paget disease, such as tiludronate disodium
Paget disease
People taking any medications or with underlying conditions should talk with a healthcare professional before trying a calcium supplement.
How we chose the best calcium supplements
Medical News Today chooses calcium supplements that meet the following criteria:
Ingredients: MNT selects products containing safe and high-quality ingredients that are clearly labeled. They should also confirm they are free from pesticides, heavy metals, and mold.
Dosage: Each dietary supplement MNT chooses clearly states the recommended dosage.
Serving size: MNT selects products in which manufacturers recommend a safe dosage.
Third-party testing: MNT chooses products that must undergo third-party testing for contaminants by an ISO 17025-compliant laboratory.
ISO 17025-compliant
Available certificate of analysis: MNT selects companies that demonstrate transparency and share a product’s certificate of analysis (COA) following receipt of its third-party lab results.
Medical News Today follows a strict product selection and vetting process. Learn more.
Learn more.
The best calcium supplements

Care/of Calcium Plus

Form: tablet
Number of servings: 30 per container
Dose: 2 tablets per day
Active ingredient(s) (serving strength): vitamin D3 666 IU (83% DV), calcium 480 mg (37% DV), magnesium 66.6 mg (16% DV), vitamin K2 60 mg
Certifications: Certified C.L.E.A.N, third-party tested for purity and potency
$10.00 AT CARE/OF
*Price may vary.
Care/of offers personalized vitamin and mineral recommendations, which customers can subscribe to or purchase as and when they need. The company tests products three times during manufacturing, including third-party testing before it sells the product.
According to research, there is evidence to suggest that taking calcium, vitamins K and D, and magnesium could promote overall skeletal health.
research
The calcium in Care/of Calcium Plus supplements comes from sustainably derived Icelandic red algae, making it suitable for vegetarians and those who are lactose intolerant.
lactose intolerant
Care/of claims that algae naturally contains magnesium and other trace minerals.
magnesium
The manufacturer recommends taking these supplements separately from iron supplements, which may affect absorption.
This product is free from:
egg
egg
fish
fish
milk
milk
peanuts
peanuts
shellfish
shellfish
soy
soy
tree nuts
wheat
wheat
Read our review of Care/of.
Read our review of Care/of.

free from many major allergens
suitable for vegetarians
Care/of tests products three times during manufacturing
provides a lower amount of calcium than other options
people should not take this supplement with an iron supplement
free from many major allergens
suitable for vegetarians
Care/of tests products three times during manufacturing
provides a lower amount of calcium than other options
people should not take this supplement with an iron supplement
Shipping: calculated at checkout
Price: $10.00
Shipping: calculated at checkout
Price: $10.00

Nature Made Calcium Gummies with D3

Form: gummy
Number of servings: 40 per container
Dose: 2 gummies per day
Active ingredient(s): vitamin D3 1000 IU (125% DV), calcium 500 mg (38% DV), phosphorus 230 mg (18% DV)
Available flavors: Cherry, Orange & Strawberry
$17.39 AT AMAZON
*Price may vary.
Gummy calcium 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 recommends consuming 2 gummies daily. As with all supplements, people should keep them out of reach of children.
gummies are easier to take than capsules for some people
available in three flavors
free from synthetic dyes, artificial flavors, and sweeteners
each dose provides under 50% of a person’s calcium DV
not suitable for vegetarians or vegans
each dose provides 5 g of added sugar, which is 10% of the daily value for added sugar
gummies are easier to take than capsules for some people
available in three flavors
free from synthetic dyes, artificial flavors, and sweeteners
each dose provides under 50% of a person’s calcium DV
not suitable for vegetarians or vegans
each dose provides 5 g of added sugar, which is 10% of the daily value for added sugar
Returns: free returns for Prime members
Shipping: free shipping for Prime members
Returns: free returns for Prime members
Shipping: free shipping for Prime members

NOW Supplements Calcium Carbonate Powder

Form: powder
Number of servings: 200 per container
Dose: half a teaspoon (1.7 g) per day
Active ingredient(s): calcium 600 mg (46% DV)
Certifications: Non-GMO Project Verified
$7.34 AT AMAZON
*Price may vary.
This product contains pure calcium carbonate powder. As 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 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
yeast
shellfish
peanuts
sesame

A calcium citrate version is also available on Amazon.
available on Amazon

may suit people who find swallowing tablets and capsules difficult
individuals can adjust their dose as needed
people can easily add it to drinks they have with meals
may be more difficult to be accurate while measuring a dose
some buyers did not like the taste or texture of the powder in drinks
may suit people who find swallowing tablets and capsules difficult
individuals can adjust their dose as needed
people can easily add it to drinks they have with meals
may be more difficult to be accurate while measuring a dose
some buyers did not like the taste or texture of the powder in drinks
Returns: free returns for Prime members
Shipping: free shipping for Prime members
Returns: free returns for Prime members
Shipping: free shipping for Prime members

HUM Nutrition Got Calcium Tablets

Form: tablet
Number of servings: 30 per container
Dose: 2 tablets per day
Active ingredient(s): vitamin D3 10 mcg (50% DV), calcium 630 mg (48% DV)
Certifications: Clean Label Project Certified
$15.00 AT HUM NUTRITION
*Price may vary.
HUM states it manufactures supplements using carefully sourced and tested ingredients to ensure potency and effectiveness. The company also claims it uses clinically tested actives and employs triple testing — including third-party testing — during manufacturing.
HUM Got Calcium supplements are vegan and free from artificial colors, flavors, sweeteners, or preservatives. They do not contain:
vegan
milk
eggs
fish
tree nuts
wheat
soy
peanuts
Learn about the most important supplements for vegans.
most important supplements for vegans

HUM uses triple testing during manufacturing
it is a vegan supplement
it includes vitamin D3 to help absorption
contains more vitamin D than calcium
provides less than half of a person’s calcium DV
the tablets are quite large
HUM uses triple testing during manufacturing
it is a vegan supplement
it includes vitamin D3 to help absorption
contains more vitamin D than calcium
provides less than half of a person’s calcium DV
the tablets are quite large
Returns: free within 30 days
Shipping: free shipping over $50
Returns: free within 30 days
Shipping: free shipping over $50

MegaFood Calcium & Magnesium Tablets

Form: tablet
Dose: 3 tablets per day
$31.99 AT MEGAFOOD
*Price may vary.
These tablets may suit people looking for a low dose calcium supplement or a calcium and magnesium multimineral supplement. This may be useful for people who take in most of their calcium through their diet.
They contain 150 mg of calcium and 75 mg of magnesium to help support muscle function.
Learn about the best magnesium supplements.
the best magnesium supplements
Other ingredients include 60 mg of a mineral herb blend containing organic nettle leaf, organic dandelion root, and organic parsley leaf.
nettle
dandelion
parsley
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 that offer 15% off.
suitable for those wanting to try a low dose of calcium
also contains magnesium for muscle function
this product is certified vegan
a low dose may not be useful for everyone
it is expensive compared to other products
suitable for those wanting to try a low dose of calcium
also contains magnesium for muscle function
this product is certified vegan
a low dose may not be useful for everyone
it is expensive compared to other products
Number of servings: 20 per container
Active ingredient(s): calcium 150 mg (11% DV), magnesium 75 mg (18% DV)
Certifications: Non-GMO Project Verified, Certified Vegan, Certified B Corporation
Returns: free within 30 days
Shipping: free shipping over $50
Price: $31.99
Number of servings: 20 per container
Active ingredient(s): calcium 150 mg (11% DV), magnesium 75 mg (18% DV)
Certifications: Non-GMO Project Verified, Certified Vegan, Certified B Corporation
Returns: free within 30 days
Shipping: free shipping over $50
Price: $31.99

Renzo’s Hercules Calcium Supplement with Vitamin D and K2

Form: dissolving tablets
Number of servings: 30 per bottle
Dose: Children 2-3 years old take 1 tablet daily; children ages 4 and older take 2 tablets daily
Active ingredients: vitamin D3 10 mcg (67% DV), calcium 100 mg (14% DV), vitamin K2 22 mcg
$17.99 AT AMAZON
*Price may vary.
Renzo’s describes these children’s supplements as “melty” tablets. They dissolve in the mouth, meaning children do not have to swallow tablets, use liquid supplements, or chew gummies. People can also dissolve these tablets in water, juice, or smoothies.
Children ages 2–3 years should take 1 tablet daily, while children ages 4 and over require 2. The information we provide on the vitamin and mineral doses in this supplement refer to the recommended daily values for 2- to 3-year-olds.
They do not contain sugar or gluten, and the fruit flavors are natural. The gummies are NSF certified and go through third-party testing.
The tablets are vegan and free from:

GMO ingredients
GMO ingredients

common allergens
common allergens

However, Renzo’s does not state which allergens these are.

the tablets dissolve in the mouth
people can also dissolve them in water, juice, or smoothies
they do not contain sugar
does not provide all of a child’s calcium DV
Renzo’s does not specify which allergens the supplement is free from
the tablets dissolve in the mouth
people can also dissolve them in water, juice, or smoothies
they do not contain sugar
does not provide all of a child’s calcium DV
Renzo’s does not specify which allergens the supplement is free from
Available flavors: grape
Returns: 30-day return policy
Shipping: free
Available flavors: grape
Returns: 30-day return policy
Shipping: free

Persona Nutrition Calcium Citrate

Form: tablet
Dose: 1 tablet per day
Active ingredient(s): calcium 200 mg (15% DV)
% DV: 15%
$0.09 AT PERSONA
*Price may vary.
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.
Read our review of Persona.
Read our review of Persona.
A 2020 study notes that the European Guideline suggests a person gets 1,200–1,500 mg of calcium from diet or supplements in divided doses after bariatric surgery to minimize the risk of kidney stones and bone disease.
1,200–1,500 mg
bariatric surgery
kidney stones
According to the manufacturer, calcium citrate may also suit those with low stomach acid to maintain healthy bones and fill nutrition gaps.
low stomach acid
This supplement is suitable for vegans and free from the following allergens:
wheat
soy
lactose
corn
egg
fish
shellfish
tree nuts
peanuts
gluten
gluten
However, it produces this supplement in a facility that handles all of these allergens, increasing the risk of cross-contamination.

Persona tests its products itself, meaning this product is not third-party tested.
low daily cost
free from a wide range of allergens
Persona provides personalized supplements
Persona does not use a third party to test its products
does not provide a lot of calcium per dose
low daily cost
free from a wide range of allergens
Persona provides personalized supplements
Persona does not use a third party to test its products
does not provide a lot of calcium per dose
Shipping: calculated at checkout
Shipping: calculated at checkout
Comparing the best calcium supplements
The table below compares the calcium supplements in this article on their key features.
Care/of
HUM
MegaFood
Nature Made
NOW
Renzo’s
Persona Nutrition
What is calcium?
Calcium is a mineral that plays an important role in many key bodily functions, including:
important role
building strong bones and teeth
strong bones
teeth
transmitting nerve signals
supporting muscle function
muscle function
secreting hormones
supporting blood clotting
blood clotting
helping blood vessels expand and contract
expand
Additionally, calcium may also help prevent or reduce the risk of significant health concerns, such as cancer, metabolic syndrome, obesity, and preeclampsia.
cancer
metabolic syndrome
obesity
preeclampsia
Although calcium is the most abundant mineral in the body, people still need to replenish it every day. The best way to take in calcium is by eating a balanced, nutritious diet.
most abundant
need to replenish it
nutritious diet
Roughly 72% of the calcium people in the United States consume comes from dairy products such as yogurt, milk, cheese, and foods with added dairy ingredients.
72%
Other good dietary sources of calcium include:
calcium-fortified foods, such as cereals or soy milk
soy milk
canned fish with bones, such as sardines or salmon
sardines
salmon
greens, such as spinach or kale
spinach
kale
certain types of beans, such as pinto or white beans
beans
Learn more about the benefits of a balanced diet.
benefits of a balanced diet
How to choose a calcium supplement
The best calcium supplement will depend on the person’s unique circumstances. The type and quantity of calcium a person needs will vary depending on:
their age
whether or not they take any medications
whether or not they have any health conditions
A doctor can advise on the best way for someone to get more calcium based on these factors.
How much calcium should a person have?
It is important to choose a supplement containing the right amount of calcium for a person’s age. The NIH suggests that people get the following amounts of calcium in their diet each day:
NIH
People below the age of 18 years who are pregnant or nursing need 1,300 mg of calcium per day.
People should also consider other factors when choosing a suitable calcium supplement. These include:
In addition to finding a product with the right dosage, it is also a good idea to consider which form of calcium will be most suitable.
There are two main forms of calcium in supplements: calcium carbonate and calcium citrate.
Calcium carbonate is:
widely available
inexpensive
higher in calcium
higher in calcium
However, calcium carbonate relies on stomach acid for absorption, so people should take it with food. Some people may also find that calcium carbonate causes side effects, such as gas and bloating.
gas
bloating
Calcium citrate does not depend on stomach acid for absorption. As a result, it can be more suitable for people with:
does not
lower levels of stomach acid
lower levels of stomach acid
inflammatory bowel disease
inflammatory bowel disease
malabsorption
a sensitivity to calcium carbonate
However, calcium citrate is more expensive than calcium carbonate, and it contains less calcium overall. This means that a person may need to take a higher dose to meet their calcium needs.
Learn about the best vitamin brands.
best vitamin brands
The Bone Health and Osteoporosis Foundation (BHOF) states that the body absorbs calcium best when people take 500–600 mg or less at a time through food or a supplement.
500–600 mg or less
People can aim to consume calcium-rich foods in small amounts throughout the day or take a calcium supplement with a meal.
People may also ensure they take optimal vitamin D through their diet or a supplement, as it is essential for calcium absorption.
vitamin D
essential
For more in-depth resources about vitamins, minerals, and supplements, visit our dedicated hub.
dedicated hub
Who needs a calcium supplement?
Many people can get enough calcium from a balanced diet.
However, the NIH notes that certain groups may be more at risk of calcium deficiency, including:
NIH
Postmenopausal females: Decreases in estrogen can reduce calcium absorption and increase the risk of osteoporosis. Taking calcium supplements may slow the rate of bone density loss in postmenopausal people. Learn how to increase bone density naturally.
estrogen
osteoporosis
postmenopausal
how to increase bone density naturally
People with infrequent or no periods: People who do not have a regular menstrual cycle may also have lower estrogen levels. Athletes or people with eating disorders can sometimes have irregular cycles.
menstrual cycle
eating disorders
irregular cycles
People with lactose intolerance or a dairy allergy: Avoiding dairy products due to lactose intolerance, dairy allergy, or personal preference, can make it challenging to get enough calcium. Taking a supplement can help boost levels.
lactose intolerance
dairy allergy
Vegans and some vegetarians: Vegans and ovovegetarians, who eat eggs but no dairy products, may not get enough calcium from their everyday diet.
eggs
If a person is concerned about a calcium deficiency, it is important to speak with a healthcare professional. They can perform certain tests and analyze the person’s overall health and diet to confirm whether or not a calcium supplement is necessary.
calcium deficiency
Other ways to boost calcium intake
A person may be able to get enough calcium from food alone. Dairy products such as yogurt, milk, and cheese contain the highest calcium levels.
Some dairy- and lactose-free sources of calcium include:
include
nuts and seeds
nuts
dark leafy greens, such as spinach and kale
spinach
kale
beans and lentils
lentils
tofu made with calcium sulfate
tofu
canned fish, such as sardines or salmon
sardines
salmon
fortified breakfast cereals
fortified milk alternatives
fortified fruit juice
Some substances can also reduce the amount of calcium the body absorbs. These include:
reduce the amount
caffeine
caffeine
alcohol
alcohol
high amounts of salt
salt
If a person’s body has difficulty absorbing calcium, they may benefit from reducing their intake of foods and beverages that contain these substances.
Learn about other dairy-free sources of calcium.
dairy-free sources of calcium
When people do not take in as much calcium as their bodies need, the body leaches calcium from the bones. This makes the bones more brittle and increases the risk of fractures. Osteoporosis, rickets, and osteomalacia are all bone disorders that may result from low calcium.
leaches calcium
rickets
osteomalacia
bone disorders
may result
Other risks of low calcium may include dry skin, hair, and nails, as well as muscle spasms and neurological symptoms.
Other risks
dry skin
hair
nails
muscle spasms
When to contact a doctor
People who suspect they have a calcium deficiency should speak with a healthcare professional. They can determine if this is the case and, if so, recommend some ways to get more calcium.
If a person experiences new or worsening symptoms while taking calcium, they should stop taking the supplement and seek medical advice.
Frequently asked questions about calcium supplements
Calcium carbonate typically contains more calcium than calcium citrate, so it may provide a bigger boost to a person’s calcium levels than calcium citrate.
contains more
However, calcium citrate is better for people with certain health conditions, such as inflammatory bowel disease or malabsorption, as it does not rely on stomach acid for absorption.
inflammatory bowel disease
malabsorption
People should speak with a doctor to discuss which type would be best for them.
Calcium carbonate typically contains more calcium than calcium citrate, so it may provide a bigger boost to a person’s calcium levels than calcium citrate.
contains more
However, calcium citrate is better for people with certain health conditions, such as inflammatory bowel disease or malabsorption, as it does not rely on stomach acid for absorption.
inflammatory bowel disease
malabsorption
People should speak with a doctor to discuss which type would be best for them.
Getting calcium from food is the best way to get optimal calcium each day.
A 2020 literature review found that meeting the recommended intake of 1,200 mg per day of calcium for older adults, taking a minimum of 600 IU of vitamin D, and consuming a balanced diet supported bone health.
2020 literature review
Calcium carbonate was the most absorbable form, according to this study.
Getting calcium from food is the best way to get optimal calcium each day.
A 2020 literature review found that meeting the recommended intake of 1,200 mg per day of calcium for older adults, taking a minimum of 600 IU of vitamin D, and consuming a balanced diet supported bone health.
2020 literature review
Calcium carbonate was the most absorbable form, according to this study.
Calcium is an essential mineral and people should make sure they have regular calcium from their diet or a supplement.
However, some individuals may have dietary, lifestyle, or other health restrictions that prevent them from consuming calcium from the usual sources, such as dairy, cheese, and yogurt.
Alternative sources of calcium include beans, nuts, and seeds, dark leafy green vegetables, tofu, and fortified cereals.
Calcium is an essential mineral and people should make sure they have regular calcium from their diet or a supplement.
However, some individuals may have dietary, lifestyle, or other health restrictions that prevent them from consuming calcium from the usual sources, such as dairy, cheese, and yogurt.
Alternative sources of calcium include beans, nuts, and seeds, dark leafy green vegetables, tofu, and fortified cereals.
Calcium citrate is better for bone density because the body absorbs it more easily than calcium carbonate.
Calcium citrate is better for bone density because the body absorbs it more easily than calcium carbonate.
Some researchers have found an increased risk of stroke when people take calcium supplements together with vitamin D. However, researchers need to investigate this further before coming to a definitive conclusion about this combination’s safety.
researchers
Some researchers have found an increased risk of stroke when people take calcium supplements together with vitamin D. However, researchers need to investigate this further before coming to a definitive conclusion about this combination’s safety.
researchers
Summary
Calcium is an essential nutrient for bone health. Some people may not be able to get enough calcium from their diet, in which case they may benefit from taking a nutritional supplement.
A healthcare professional can help someone choose the form and dosage they need. They can also advise on any other nutrients that might help with absorption.