Calcarea carbonica 12X
Also known as: Calcarea carbonica, Calcium carbonate in homeopathic dilution
Overview
Calcarea carbonica is a homeopathic preparation derived from calcium carbonate, typically sourced from oyster shells or similar natural sources. The designation '12X' indicates a decimal dilution repeated 12 times, resulting in an extremely dilute solution. It is traditionally used in homeopathy for various conditions, including developmental delays, fatigue, and bone and joint issues. As a homeopathic remedy, it is believed to stimulate the body's self-healing mechanisms. However, research on Calcarea carbonica is limited and primarily within the domain of homeopathy, which remains controversial in mainstream medicine. Evidence is sparse, with few rigorous randomized controlled trials (RCTs) meeting high methodological standards. Most studies have small sample sizes and mixed results, making it difficult to draw definitive conclusions about its efficacy.
Benefits
There is no strong, consistent evidence from high-quality RCTs that Calcarea carbonica 12X provides clinically significant benefits beyond placebo. Some trials within homeopathy research have reported mixed or minor improvements in conditions such as attention-deficit/hyperactivity disorder (ADHD) and childhood diarrhea, but these results are inconsistent and often not statistically robust. Some homeopathic trials including Calcarea carbonica as part of individualized remedies have reported mild symptom improvements, but these are difficult to attribute specifically to Calcarea carbonica due to the use of multiple remedies and lack of standardization. Effect sizes reported in homeopathy trials are generally small, with many studies showing no significant difference compared to placebo.
How it works
No scientifically validated mechanism of action exists for Calcarea carbonica at homeopathic dilutions. The dilutions used (12X) are beyond the point where any molecules of the original substance are likely to remain. Proposed mechanisms in homeopathy are based on 'like cures like' and energy imprint theories, which lack empirical support. At 12X dilution, the remedy contains negligible amounts of calcium carbonate, so traditional pharmacokinetics do not apply. There are no known molecular targets or interactions with specific biological pathways.
Side effects
Calcarea carbonica 12X is generally considered safe due to the extreme dilution of the original substance. Common side effects are not reported in high-quality studies. Mild transient symptoms are occasionally reported, but these are likely placebo or nocebo effects. No serious adverse events have been documented. Due to the negligible amount of active substance, there are no known drug interactions or contraindications. It is considered safe in children and adults due to the dilution, but its efficacy remains unproven. Overall, the safety profile is favorable, but users should be aware that any perceived benefits are unlikely to be due to a pharmacological effect.
Dosage
There is no established effective dose for Calcarea carbonica 12X, as it is a homeopathic preparation. Typically, it is administered as per a homeopathic practitioner’s prescription, often several times daily. There is no reported toxicity at any homeopathic dilution, so a maximum safe dose has not been established. Timing considerations vary by condition and practitioner. Oral tablets or pellets are common forms. Due to the extreme dilution, absorption factors and required cofactors are not applicable.
FAQs
Is Calcarea carbonica 12X effective?
Current high-quality evidence does not support efficacy beyond placebo.
Is it safe?
Yes, it is generally safe due to high dilution.
How quickly does it work?
No reliable data; any reported effects vary widely.
Can it replace conventional treatment?
No, it should not replace evidence-based therapies.
Are there misconceptions?
Yes, many believe homeopathic remedies contain active ingredients at pharmacological levels, which is not the case.
Research Sources
- https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=9e57ef0c893e76eec39f5c1f607581894b2406b8 – This systematic review of RCTs examined the effectiveness of homeopathy for childhood and adolescence ailments, including ADHD and diarrhea. The review found mixed results, with no consistent benefit of homeopathic remedies, including Calcarea carbonica, and no significant difference from placebo in most trials. The limitations included small sample sizes, heterogeneous conditions, and variable quality of the included studies.
- https://www.nhmrc.gov.au/sites/default/files/documents/attachments/Homeopathy-Overview-report-Appendices-newversion.pdf – The NHMRC Homeopathy Overview Report is a systematic review that assessed the effectiveness of homeopathy for various conditions. The review found no significant difference between homeopathy (including Calcarea carbonica) and placebo in primary outcomes, with some minor symptom improvements reported. The small sample sizes and the use of individualized remedies complicated the attribution of any observed effects.
- https://apha.confex.com/apha/2017/mediafile/Handout/Paper394700/Homeopathy%20Curative%20Concurrent%20Supportive%20Cancer%20Therapy_APHA_7Nov2017_Handout.pdf – This review examined the use of homeopathy in cancer therapy, including controlled trials and retrospective studies. The review found no serious adverse effects and some retrospective reports of remission with other homeopathic remedies, but no robust RCT evidence for Calcarea carbonica. The lack of RCTs, retrospective design, and confounding treatments limit the conclusions that can be drawn.
- https://www.hilarispublisher.com/open-access/homeopathy-curative-concurrent-and-supportive-cancer-treatment-potential-2329-6771-1000194.pdf – This article discusses the potential of homeopathy as a curative, concurrent, and supportive cancer treatment. While it mentions the use of homeopathic remedies in cancer care, it does not provide robust RCT evidence for the efficacy of Calcarea carbonica specifically. The article highlights the need for further research to validate the potential benefits of homeopathy in cancer treatment.
- https://www.health.gov.au/sites/default/files/2025-03/homeopathy_tr-apxabc_final.pdf – This report provides an overview of homeopathy and its use in various health conditions. It concludes that there is no reliable evidence to support the effectiveness of homeopathy for any health condition. The report emphasizes the importance of evidence-based medicine and cautions against relying on homeopathy as a substitute for conventional medical treatments.
Supplements Containing Calcarea carbonica 12X

Leg Cramps PM Tablets
Hyland's
Baby Oral Pain Relief Daytime
Hyland's Naturals

Baby Oral Pain Relief Nighttime
Hyland's

Baby Oral Pain Relief Daytime
Hyland's

Leg Cramps PM
Hyland's
Oral Pain Relief Nighttime
Hyland's Naturals

Baby Oral Pain Relief Daytime
Hyland's

Baby Oral Pain Relief Nighttime
Hyland's

Lymph-Tone III™
Energetix®

Neuro-Chord
energetix