Thorne Research Calcium Citrate - 90 Vegetarian Capsules Calcium bound to citric acid is a well-absorbed form of calcium. Citric acid is a naturally occurring organic acid that is able to efficiently bind three mineral molecules for every one of its own molecules. Studies have shown significantly more calcium is absorbed in the body from calcium citrate than from calcium carbonate. One study found patients with low hydrochloric acid levels absorbed an average of 10 times more calcium from citrate than from carbonate. According to the U.S. Food and Drug Administration, adequate calcium throughout life, as part of a well-balanced diet and physical activity, may reduce the risk of osteoporosis later in life. better absorbed than calcium carbonate a key nutrient for bone health improved absorption in individuals with low stomach acid without preservatives, magnesium stearate, or other lubricants and diluents Dr. Michael Lebowitz D.C. Recommends:Calcium Citrate is useful in musculoskeletal cases, for insomnia, for people who hold in their emotions, and in treating hypertension. Other signs of deficiency include agitation, depression, eczema, hyperactivity, palpitations, and periodontal disease. Thorne Research's MissionAt Thorne Research, their mission is to enhance the health and well-being of people by providing superior dietary supplements that have the highest level of quality and purity - thereby creating the most respected and valued company in the dietary supplement industry. The Thorne Difference. For more than 25 years, Thorne has relentlessly pursued the highest possible quality and bioavailability in dietary supplements. At Thorne, they actually manufacture products that they sell - a key difference that allows Thorne to control every aspect of the manufacturing process and ensure that every Thorne product is in pure, completely hypoallergenic form, and without the common additives, flowing agents, and binders used throughout the industry.