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5 Best Calcium Supplements In 2023: Top Brand Reviews

Mitchelle Morgan

Updated on - Written by
Medically reviewed by Kathy Shattler, MS, RDN

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Care/of Calcium Plus

Care/of Calcium Plus

  • Has an interactive app
  • Third-party tested
  • Contains additional beneficial nutrients

Persona Nutrition Calcium Citrate

Persona Nutrition Calcium Citrate

  • Scientifically-backed
  • Offers customized supplements
  • Has a team of experts available for consultation

Life Extension Calcium Citrate With Vitamin D

Life Extension Calcium Citrate with Vitamin D

  • Clear from synthetic additives
  • Non-GMO 
  • Contains Vitamin D

Dietary supplements come in various forms and dosages, plus they each contain specific vitamins and nutrients that serve the human body in various ways. Calcium supplements are widely used primarily for bone health. Calcium is the most abundant mineral in the human body and more than 99% is found in the bones.

But that is not all!

Calcium also aids in blood clotting, muscle contraction, and regulating proper heart rhythms and neuron activities. So this means that calcium is fundamental to maintaining strong bones and helping mitigate cardiovascular disease.

Dairy products, yogurt, milk, and cheese, are the food group with the highest calcium content[1]. Canned salmon and sardines with bones, chia seeds, tofu, soy milk, and green vegetables are also good calcium-rich foods.

Unfortunately, not many people partake of these foods, especially in the United States[2]. So, it necessitates calcium supplementation using a high-quality supplement with the nutrient. Surveys show[3] that over 40% of Americans do not meet their calcium needs through food alone.

Calcium supplementation may be beneficial if you have a deficit, have absorption difficulties due to a medical condition, or maintain a dairy-free or low-calcium diet. Nonetheless, if you are not in one of these groups, the advantages of getting a calcium supplement are less clear[4].

This piece looks at five of the best calcium supplements and what they can do for you. It also highlights how much calcium to take and how to take it depending on the brand in focus.

Best Calcium Supplements For Bone & More in (June. 2023)

Best Calcium Supplements For Bone & More 2023

Care/Of Calcium Plus

Care/of is the best calcium supplement brand for women and men with an interactive mobile app that offers rewards for taking your pills. It’s a smart way that sets this brand apart from the other supplements in the market.

  • Third-party tested
  • Contains additional beneficial nutrients like magnesium, vitamin K2, and vitamin D
  • Gluten-free and additive-free
  • The subscription and door-step delivery ensure that users always have stock
  • Free from genetically modified organisms (Non-GMO)

A supplement subscription is a practical option because your calcium supplement is sent to your house every month, ensuring that you never miss a dose.

When you sign up, take the survey to get personalized suggestions based on your nutrition, activity regimen, and health objectives.

With 480 mg of calcium per serving, the Calcium Plus supplement gives you a lot of value. It also contains other pro-bone-health components, such as vitamin D, vitamin K2[9], and magnesium[10] supplements. The formulation is certified gluten-free, GMO-free, and vegetarian-friendly.

Care/of provides extensive information on how it acquires its ingredients, allowing you to shop with certainty. Each supplement is also put through a series of tests to ensure safety and effectiveness. The fun is amplified by an interactive application that offers rewards for taking your pills.

Persona Nutrition Calcium Citrate

Persona Nutrition is a U.S.-based individualized nutrient and supplement firm established in Washington State. Persona nutrition supplements are custom-made to meet your specific health requirements.

  • Tailored for medical conditions
  • You may change or cancel your subscription anytime
  • Medical personnel is on hand to answer any questions
  • No need for a blood test
  • Free from any artificial flavors and other common allergens
  • Third-party tested – every product has a certificate of analysis (COA)
  • Vitamins that are expensive to buy individually are only sold in packages
  • Only available online

As per the website, your nutritional info is recommended, reviewed, and cross-checked by a panel of medical practitioners to design an efficient formula tailored to you.

Persona Nutrition will build a customized plan that addresses your individual needs once you complete an online assessment. After that, you’ll set up a profile and enroll in the healthcare providers’ membership plan. The customizable feature makes it the best calcium supplement for pregnancy.

Calcium citrate and Calcium with Magnesium are the two calcium products listed on the ingredient formulary. They also make essential packs that sort specific issues like sleep, energy, weight loss, or stress. All of these come as powders, gummies, and bottled supplements.

These supplements are manufactured in the same plant as wheat, corn, soy, lactose, egg, fish, shellfish, gluten, peanuts, and tree nuts. If you are allergic, be aware that cross-contamination may occur. The products themselves are screened for allergens on the questionnaire.

Life Extension Calcium Citrate With Vitamin D

The brand’s high-quality supplements have all been clinically evaluated. For that reason, Life Extension is one of the best places to go where your safety is guaranteed at the highest level.

  • It supports bone and joint function and safety
  • Available at a reasonable cost
  • Offers international shipping
  • 100-day refund and return policy
  • Email and phone available for customer assistance
  • International shipping is an extra charge

The brand claims that they offer the most effective supplements on the market.

Life Extension is a health and well-being brand that provides the most comprehensive array of health supplements.

The calcium is present in amounts equal to 15% of the Daily Value (DV) or 200 mg, and the Vitamin D is present at only 13% of the DV in one serving. The calcium, however, is present in a highly bioavailable form as calcium citrate and vitamin D increase the absorption of the calcium.

Unfortunately,  the product contains a controversial substance, modified food starch. Modified food starch[5] can increase your risk for stroke.  It is unlikely that the small amount contained in vitamin supplements will offer up much harm, but cumulative amounts of any substance containing modified food starch may add up to trouble. Because it contains no GMOs, chemicals, or artificial ingredients, Life Extension Calcium Citrate with Vitamin D provides a high degree of safety. Vitamin D[6] is present in these calcium pills, which helps maintain good bone health.

Calcium Citrate with Vitamin D is made with organic components to help support bone health, blood vessel relaxation and expansion, blood pressure[7], and bone density. Vitamin D is added to this supplement to help preserve overall bone health and function. Calcium citrate supplements are the best form of calcium to take for low stomach acid to maintain healthy bones and bone mineral density.

These dietary calcium pills improve bone health by increasing bone strength, mobility, and mineral density. It is the best calcium supplement to mitigate bone loss and thus suitable for osteoporosis when taken in the correct dosage.

Pure Encapsulations Calcium Citrate

Pure Encapsulations stands apart from other wellness enterprises because of its reliable clinical nutrition supplements. The company uses pure substances backed by scientific evidence.

  • Third-party tested and scientifically supported formula
  • 30-day return policy
  • It sells items that have only the cleanest ingredients
  • All of the goods are backed and validated by scientific evidence
  • Free of artificial ingredients and flavors
  • Customer service is always available
  • The 30-day refund policy
  • It is not always available to buy
  • Dosage may require up to six pills per day

The powerful calcium supplement is a dependable product that may help you increase your calcium intake to attain the recommended calcium levels in your body.

The Pure Encapsulations Calcium Citrate is a good option for maintaining bone, tooth, gut health, and cardiovascular processes. Only premium ingredients are used in this product and purchased from reputable vendors and advised by nutritional specialists. 

Without genetically modified plants, sugar, preservatives, artificial colors or flavor, or fillers, Calcium Citrate[21] is made with vegetarian capsules and ascorbyl palmitate. They are perfect for someone on a strict vegan diet. Two capsules have 300 mg of calcium per serving, and a serving is two capsules 1-3 times daily.

Because of its pure formula, this calcium supplement is easily absorbed by the body and has amazing outcomes for joints, bones, cardiovascular health, and overall wellness.

Rootine Personalized Daily Multivitamin

Backed by Dr. Daniel Wallerstorfer, a top genetic expert with over a decade of constructing genetics and nutrition labs. He is the co-founder of Rootine.

  • The supplement is tailored to your needs
  • Users may find that swallowing microbeads is easier than swallowing huge pills
  • Suitable for vegetarians and vegans
  • No megadosing
  • It takes some practice to swallow the microbeads
  • Expensive calcium supplement

Rootine is a unique supplement brand in that it develops a personalized mix relying on your lifestyle, medical history, and a DNA test.

The nutritional information and components are printed on the package holding the packs of supplements.

The boxes each provide at least 100% of the overall recommended dietary allowance (RDA) of vitamin C[11], vitamin E[12], vitamin D3[13], vitamin B6[14], vitamin B2[15], selenium[16], folate[17], zinc[18], and iron. However, the percentages vary depending on your particular profile, with some nutrients being higher as per your deficiency. Most of these nutrients have a part to play in bone health. Calcium, magnesium, Methylsulfonylmethane[19] (MSM), copper[20], alpha-lipoic acid, manganese, CoQ10, and phytosterol were all present in substantial amounts. Each ingredient is available in the multivitamin supplement in varied proportions depending on the results of your DNA test linked to your needs.

How To Choose Best Calcium Supplements?

If you think you should take a calcium supplement, get professional medical advice about the best type and dosage for you as an individual. Also, search for a calcium supplement that includes any vitamin D type like vitamin D2 or D3. Vitamin D3 is superior at raising blood levels[22] of vitamin D when compared to D2.

Taking calcium supplements with enough vitamin D is beneficial as these two minerals work together to improve calcium absorption. All in all, ensure that before you settle for the best calcium supplement, check for the following:

Calcium Types

When you flip the calcium supplement bottle over and check the calcium type, you’ll probably find calcium citrate or calcium carbonate. There are some distinctions between these two categories.

One of the most significant variables is the elemental calcium in each. Elemental calcium is the quantity that the body can truly use. Fortunately, the supplement manufacturer has already done the hard work for you, so the listed amount of calcium on the package in parenthesis after the total calcium amount is the elemental calcium.

Because calcium carbonate supplements are dependent on stomach acid for efficient absorption, it is best taken with food. It contains the most elemental calcium at 40%, making it an excellent choice for maximizing calcium absorption. Calcium carbonate is found in fortified foods such as juices and plant-based milk drinks.

Calcium citrate is a good alternative for persons with absorption difficulties, such as inflammatory bowel disease (IBD) or low stomach acid, because it can be taken without food. The proportion of elemental calcium in calcium citrate is roughly 21%. Brands that use these are the best calcium supplement for sensitive stomachs.

The other types of calcium supplements are:

  • Calcium gluconate with 9% elemental calcium.
  • Calcium lactate with 13% elemental calcium.


The best calcium supplements above are completely safe and pure, with a high absorption rate. Calcium supplements must be bioavailable to avoid stomach problems.

 Calcium citrate has the highest absorbability, while calcium carbonate has the highest amount of elemental calcium. The presence of vitamin D increases calcium absorption while vitamin K stimulates the accumulation of calcium in the bones.

The reason calcium is often not included in multivitamins is nutrient interaction for absorption. The presence of zinc supplements or iron supplements in the presence of calcium will inhibit the absorption of calcium and vice versa.

The Dosage

Calcium[4] intake should be 1,000 mg per day for people aged 19 to 50. From the age of 51 onwards, this rises to 1,200 mg for individuals born female and for men after age 71. Adolescents need 1,300 mg per day.It’s vital to remember that simply because your body won’t be able to absorb everything at once, you will want to take your calcium supplement in divided doses. You should only take 500 mg of calcium supplement[23] at a time because your body may not be able to handle more. In this situation, more calcium isn’t necessarily better.

Tested By a Third-party Lab Company

Third-party testing ensures that you’re getting exactly what the label states. Companies making any dietary supplement that choose to have third-party verification have their supplements evaluated to guarantee that they contain exactly what they advertise and nothing else. It also guarantees that it degrades properly in the body, allowing you to absorb it.

U.S. Pharmacopeial Convention (USP), National Sanitation Foundation (NSF) Certified for Sport, and Consumer Lab is the most popular third-party certifications available. Supplement brands will state whether or not they have been third-party tested and by which institution on their homepage and most will also indicate this on the bottle. Supplements may also be third-party tested by an independent lab.

The (Food and Drug Administration) FDA also urges supplement producers to engage in cGMP (current good manufacturing practices). Yet, another safety inspection ensures that the company follows proper manufacturing techniques, including quality control of their nutritional supplements. If a company adheres to cGMP, it will usually mention so on its bottle and the brand’s website.


These calcium tablets are extremely beneficial to your general health, yet they can still have side effects if misused. We don’t advocate taking more of these supplements than is recommended on any resource like a calcium fact sheet or a doctor’s prescription. 

Adults up to age 70 can handle a maximum of 2500 mg of calcium. Above that is too much calcium for their body to handle. Individuals over 70 are limited safely to 2000 mg of calcium.

Final Thought

To mitigate calcium deficiency, you may need to take enough calcium carbonate supplements or any other forms to balance the levels in the body. And besides the five brands that we have discussed above, there are others like Kirkland Signature Calcium.

Dietary guidelines from a professional such as a Registered Dietitian should govern calcium supplementation.

Generally, some groups of people may need supplementation more than others. Examples of people who may need a calcium carbonate powder or any other calcium supplement to maintain strong bones are people prone to gastrointestinal issues, postmenopausal women, adolescent girls, and people who use steroids.

Notably, the calcium supplement mg per serving must be regulated since too much calcium[24] can cause calcium supplement adverse effects. These may include an increased risk of heart disease, kidney stones, and prostate cancer. That is why a medical evaluation beforehand is fundamental.

It would help if you also kept in mind that using dietary supplements alongside some medications might be harmful. So before using a calcium supplement with thyroid medication or other medications, ensure that a doctor has given you the go-ahead.

So please, before buying any dietary supplements, get professional medical advice first.

Frequently Asked Questions

Do calcium supplements cause constipation?

Adverse symptoms such as flatulence, constipation, and gas might develop after taking calcium supplements. Calcium carbonate is by far the most constipating in general. To identify one that you absorb best without digestive issues, you may need to experiment with a few different calcium supplement brands or types.

How long does it take for calcium supplements to work?

A calcium pill must include 90-100% of the quantity of elemental calcium specified on the supplemental label and absorbed in 30-40 minutes.

What is the best calcium supplement for seniors?

Calcium citrate causes minimal or no gastrointestinal distress in most people. When contrasted to other types of calcium that can produce constipation or gas, this makes it a suitable choice. It’s a good option for seniors who have little stomach acid.

+ 24 sources

Health Canal avoids using tertiary references. We have strict sourcing guidelines and rely on peer-reviewed studies, academic researches from medical associations and institutions. To ensure the accuracy of articles in Health Canal, you can read more about the editorial process here

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Mitchelle Morgan

Medically reviewed by:

Kathy Shattler

Mitchelle Morgan is a health and wellness writer with over 10 years of experience. She holds a Master's in Communication. Her mission is to provide readers with information that helps them live a better lifestyle. All her work is backed by scientific evidence to ensure readers get valuable and actionable content.

Medically reviewed by:

Kathy Shattler

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