Calcium Citrate (USA) Powder



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Supplement Facts & Directions

Supplement Facts

Serving Size: 2750 milligrams
Servings Per Container: Varies
Amount Per Serving % Daily Value*
Calcium (from Calcium Citrate) 500mg 50%

* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value Not Established
‡ These supplement facts may vary from the product you receive. Please call for exact numbers.

Other Ingredients: None


Free of: Sugar, Soy, Dairy, Yeast, Gluten & Additives.

Directions: As a dietary supplement, take 2750 mg (3/4 tsp) up to two times daily with meals, or as directed by a physician.

Warning: If you are pregnant, nursing, taking any medications or have any medical condition consult your physician before use. Keep out of reach of children. Store in a cool, dark & dry place.

Product Details

What is Calcium Citrate?

Calcium supplements exist in different compounds -- calcium citrate, calcium carbonate, and calcium pyruvate.

Although all of these provide calcium, the value of each compound depends on different factors like concentrations and absorption capabilities. Calcium citrate is believed to have one of the best absorption rates of calcium supplements. Keep in mind the calcium content is only one factor. Bioavailability, or absorption rate, solubility, interactions with other medications or supplements, specific medical conditions of the individual, taste and cost are other factors to consider when selecting a calcium product.

Calcium citrate is a salt of calcium and citric acid, forming a somewhat sour-tasting food grade nutritional product. Beyond its use as a dietary supplement, calcium citrate is also frequently used as a food additive to impart a sour taste to foods, as a food preservative and as a water softener because the citrate ions can chelate unwanted metal ions.

Calcium is the most abundant mineral in the human body and is vital to proper function of the body. Having the right amount of calcium is crucial for building and maintaining strong bones. The body will actually take calcium from bones if there are low calcium levels. Cellular functioning, blood clotting, muscle contraction, nerve impulse transmission, and healthy teeth formation are all affected by calcium levels in the body. Calcium can also bind to other minerals and assist in eliminating them from the body.

Calcium naturally exists in many foods, including dairy products, seaweed, quinoa, beans and nuts. Yet some people suffer from a disorder known as hypocalcemia (Wikipedia), a calcium deficiency in the blood. The most common cause of hypocalcemia is vitamin D deficiency, due to poor diet or lack of exposure to the sun. This is because adequate amounts of vitamin D are required for proper absorption of calcium.

Aside from maintaining strong bones and teeth, calcium is required for muscle contraction, nerve conduction, the beating of the heart, blood coagulation, glandular secretion, energy production and immune function.

Keeping up with calcium requirements may help avoid breaks and strains on bones.

Purity and Concentration of Calcium Citrate

This calcium citrate powder contains no fillers, additives or anti-caking agents. Store in a cool, dry area protected from light. Reseal after each use.

Potential Side Effects of Calcium Citrate

Calcium in excess of 2.5 grams daily can cause mineral imbalances (impaired zinc or iron absorption). Minor gastrointestinal side effects, headaches, irregular heartbeat and increased urination may occur from taking excessive amounts of calcium citrate.

Suggested Use of Calcium Citrate

While natural foods provide the best sources of calcium (one serving of a dairy product provides 300 mg of calcium) those who do not consume enough calcium from food sources may need to supplement their daily requirement.

Bioavailability, Mixing and Solubility of Calcium Citrate

Calcium citrate is considered to have a higher bioavailability than most other common and less expensive counterparts, like calcium carbonate. Taking a vitamin D supplement together with calcium makes it easier to be absorbed, allowing it to be quickly dispersed throughout the body.

Calcium citrate is poorly soluble in water. Taking calicum citrate with cold orange or lemon juice increases its solubility. Calcium citrate can be taken on an empty stomach.

References & Further Research

University of Maryland: Calcium

American Journal of Therapeutics: A Comparison of Calcium Citrate with Calcium Carbonate

Office of Dietary Supplements, National Institutes of Health: Calcium

Wikipedia: Calcium citrate

The information at is NOT a substitute for medical advice. ALWAYS consult your doctor or pharmacist. Do not use any dietary supplement as a replacement for conventional care, or as a reason to postpone seeing a doctor about a medical problem. Tell all your health care providers about any complementary and alternative practices you use. Give them a full picture of what you do to manage your health. This will help ensure coordinated and safe care.

The U.S. Food and Drug Administration (FDA) regulates herbal and other dietary supplements differently than conventional medicines. The standards for supplements are found in the Dietary Supplement Health and Education Act (DSHEA), a federal law that defines dietary supplements and sets product-labeling standards and health claim limits.

Tested by Accredited 3rd Party Labs

PureBulk's supplements are tested by accredited third party labs in the USA to ensure their identity, purity and potency. To receive a copy of these test results or any other PureBulk supplement please fill out the COA request form found here.

*NOTE: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.