Calcium Amino Acid Chelate
Also known as: Calcium amino acid chelate, Calcium-amino acid complex, Calcium Amino Acid Chelate
Overview
Calcium amino acid chelates are synthetic compounds formed by chelating calcium ions with amino acids such as glycine, methionine, lysine, and threonine. Designed to enhance calcium bioavailability, they are utilized primarily to treat calcium deficiencies and improve plant calcium uptake in agricultural applications. Characterized by high stability and bioavailability, research on these chelates is moderately mature, with several studies supporting their effectiveness in enhancing calcium absorption and quality in plants. Despite promising findings, more large-scale human studies are needed to fully ascertain their benefits, particularly for bone health and specific populations, such as pregnant or lactating women.
Benefits
Calcium amino acid chelates provide several evidence-based benefits. Primarily, they significantly improve calcium absorption compared to other forms of calcium supplements, with studies indicating up to 46.44% higher calcium content in plant tissues treated with these chelates. While direct evidence of bone health benefits is limited, improved absorption suggests potential advantages for bone density, especially in populations like pregnant and lactating women, although further studies are required. In agricultural contexts, these chelates enhance plant quality, resulting in improved postharvest life and flower production. Overall, the efficacy of calcium amino acid chelates appears robust, but further research is warranted to establish clinical guidelines.
How it works
Calcium amino acid chelates enhance bioavailability through the formation of stable complexes with amino acids, which protect calcium ions from gastrointestinal degradation. This interaction improves absorption in the gut, allowing more calcium to be utilized by the body—particularly in the skeletal system. The bonding between amino acids and calcium involves interactions with carboxyl and amide groups, enhancing nutrient uptake in the intestinal cells.
Side effects
Calcium amino acid chelates are generally considered safe when adhering to recommended dosages. However, excessive intake may result in hypercalcemia. Common side effects occurring in more than 5% of users include gastrointestinal disturbances such as constipation, bloating, and gas. Less frequent reactions (1-5%) can include nausea, vomiting, and abdominal cramps, while rare adverse effects (<1%) may consist of hypercalcemia and kidney stones. Drug interactions may occur with medications like antacids, blood thinners, and certain antibiotics. Additionally, contraindications apply to individuals with hypercalcemia, kidney stones, or those on specific medications. Pregnant and lactating individuals should seek medical advice due to potentially increased calcium needs and limited safety data.
Dosage
Recommended dosages for calcium amino acid chelates typically range from 200 to 500 mg of elemental calcium per day for minimum effectiveness. For general health, 500 to 1000 mg per day is advised, while specific conditions may require adjusted dosages. The Tolerable Upper Intake Level (UL) for calcium is set at 2500 mg/day for adults. The supplement is most effective when taken with meals, which can enhance absorption, especially in conjunction with vitamin D. Oral capsules or tablets are common forms utilized for supplementation.
FAQs
How often should I take calcium amino acid chelates?
Typically, it is recommended to take calcium amino acid chelates once or twice a day with meals.
Can I take it with other supplements?
Yes, you can combine it with other supplements, but consult a healthcare provider to avoid potential interactions.
What are the signs of excessive intake?
Signs of excessive intake include symptoms of hypercalcemia, such as nausea, vomiting, and abdominal cramps.
Are calcium amino acid chelates safe for everyone?
Generally safe, but individuals with certain health conditions should consult a healthcare provider before use.
When is the best time to take calcium amino acid chelates?
It is best to take the supplement with meals to enhance absorption.
Research Sources
- https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2023.1337407/full – This in vitro study demonstrated that calcium amino acid chelates enhanced calcium absorption in Caco-2 epithelial cells and exhibited stability, supporting their use as an effective calcium source.
- https://journals.ashs.org/downloadpdf/view/journals/hortsci/50/9/article-p1394.pdf – Research found that calcium chelated with amino acids significantly improved the calcium content and overall quality of Lisianthus plants, enhancing postharvest shelf life.
- https://pubmed.ncbi.nlm.nih.gov/32401318/ – This systematic review assessed the impact of calcium supplementation on bone density in lactating women, finding no significant clinical benefits, which emphasizes the need for further targeted research.
Supplements Containing Calcium Amino Acid Chelate

Calm Nature
HoltraCeuticals

Serratio
Theramedix BioSET

Calcium
Source Naturals
Essential Prostate Pack
Supplement Spot

Doe Multivitamin
BUCKED UP

Vitality Multivitamin & Mineral WOMEN
Vitality by Melaleuca®
Calcium Complete™
VITALITY FOR LIFE!®
Super Beta Prostate ADVANCED
Super Beta Prostate® ADVANCED
CALCIUM MAGNESIUM ZINC
Solaray®

SUSTAIN POST-ACTIVE + creatine + tart cherry
SUSTAIN

SUSTAIN POST-ACTIVE + creatine + tart cherry
SUSTAIN

POTASSIUM MAGNESIUM
AllWise
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