Written by Katja Boehm and the CAM-Cancer Consortium.
Updated April 29, 2016


What is it?

Scientific name / brand name / common name

Carctol is a product made of a mixture of eight herbal remedies.


Carctol contains a mixture of powdered Indian herbal extracts. Each 560 mg capsule contains 20 mg Indian sarsaparilla (Hemidesmus indicus), 20 mg Blistering ammani (Ammani vesicatoria), 20 mg Puncture vine (Tribulus terrestris L.), 80 mg Chinese smilax (Smilax China L.), 20 mg Garden cress (Lepidium sativum L.), 120 mg Java pepper (Piper cubeba L.), 20 mg Himalayan rhubarb (Rheum australe D. Don) and 200 mg Blepharis edulis (Blepharis edulis Pers.). No independent analyses of the product are available

Application and dosage

A standard recommended daily dosage of Carctol for adults is between 4 and 8 capsules. Specific dosage instructions: Adult (Stage 1 or 2) 1 capsule 4 times a day, Adult (Chronic/Terminal Cases) 2 Capsules 4 times a day, Child 1/2 * 4 times a day, Infant 1/4 * 4 times a day.13

Carctol is supposed to be taken in parallel with an acid-free, vegetarian diet and needs to be accompanied by digestion-assisting enzymes. Additionally, patients are advised to drink 3-5 litres of boiled and refrigerated water each day.

Advocates suggest that Carctol must be administered strictly, as per dosage schedule, for at least 60 days for the initial response and then to be continued as per physician’s advice 2. Carctol capsules are supposed to be continued for a further six months and the daily dosage is not to be interrupted.

One Website on Carctol suggests that a “two month trial is the minimum essential period, but generally a six month period with follow-up periods is recommended”.11

History / providers

Carctol was developed by the Indian doctor Nandlan Tiwari (Rajasthan, India). Tiwari is an Ayurvedic medicine doctor who first started promoting Carctol in 1968 alongside dietary changes. He investigated the effect of indigenous herbs in the forest of Assam by gathering information provided by the tribes there, developed the herbal mixture and allegedly tested it on cancer patients for over 20 years. It is claimed that the remedy has also been tested in the UK. However, no publications exist in the medical literature. In Europe, Carctol is only available through specific UK doctors who prescribe the medicine as an Ayurvedic cancer treatment. However, “Ayurvedic medicine” implies it has a track record of traditional use, but this is not the case. A list of these doctors can be found on the official Carctol website.1 The doctor will ask the client to sign a consent form indicating s/he understands the status of the medicine in that it is an herbal dietary supplement.

Claims of efficacy / mechanisms of action / alleged indication

Carctol is advocated by its promoters as: an adjuvant treatment to prevent cancer, a means of providing protection for smokers, and a treatment of whooping cough, swallowing difficulties, appetite loss, menstrual disorders and alcohol-related liver damage. It is also recommended for a sole treatment of all types of cancer in cases where “the limits of conventional medicine have been reached” 1. According to the promoters, 30 to 40% of people using Carctol as a cancer treatment “will respond to it”. It is, however, not recommended as a substitute for conventional treatment.

The individual herbs do not have any known anti-carcinogenic properties. However, supporters of the remedy claim that it is the combination of herbs (through a synergistic effect) that causes the anti-carcinogenic activity of Carctol. Allegedly, laboratory-based toxicological testing of Carctol at the Indian Institute of Medical Sciences and in the UK, at the Lyne, Martin and Radford laboratories in London has shown it to be free of toxic bacteria, but no pre-clinical study assessing the toxicity of bacteria in Carctol has been published in the medical literature.

Dr Tiwari claims that Carctol works by helping to eliminate acids in the body. Carctol (in addition to other dietary changes) is claimed to work by changing the pH in the body from acid to alkaline by creating an alkaline environment within the body, in which acidic cancer cells cannot survive. This acidity theory dates back to the body humour theory of ancient Greek medicine. Carctol is claimed to be a detoxification method, which works by excreting toxins from the body, via the kidneys, liver and bowels. It is claimed to strengthen the immune system, neutralise toxicity from chemo- and radiotherapy, support kidney and liver function and improve digestion. It is also suggested that by administering Carctol during radio- and chemotherapy, patients are prevented from becoming neutropenic. None of these claims are supported by data nor are they physiologically plausible.

Prevalence of use

No data exist to estimate the use of Carctol by cancer patients.

Legal issues

Carctol is imported into the UK by Cankut Herbs under medical supervision and is classified as an unlicensed medicine by the Medicines and Healthcare products Regulatory Agency (MHRA). Because five of the eight herbal ingredients are classified as medicines in the UK, the preparation cannot be advertised. In the UK, there is a list of doctors, which prescribe an unlicensed medicine if they believe it may be effective to the patient without it having to be trialed and licensed.1

Costs and expenditures

A month’s supply of Carctol costs between Euro 65 for the lowest dose and Euro 130 for the highest dose plus shipping and VAT.4 The digestive enzymes patients are recommended to take at the same time cost Euro 14 per month.

The time span recommended for using the product initially is two months.

Citation Katja Boehm, CAM-Cancer Consortium. Carctol [online document]. http://ws.cam-cancer.org/The-Summaries/Herbal-products/Carctol. April 29, 2016.


  1. Carctol home website www.carctolhome.com (accessed on 08.05.12)
  2. Anticancer herb website www.anticancerherb.com (accessed on 08.05.12)
  3. Ebner S. Dr Daniel's 'miracle' cure. The Guardian, 21 September 2004, http://www.guardian.co.uk/society/2004/sep/21/lifeandhealth.medicineandhealth (accessed on 08.05.12)
  4. Cancer research UK website http://www.cancerresearchuk.org (accessed 08.05.12)
  5. Natural Medicines Comprehensive Database http://www.naturaldatabase.com (accessed on 08.05.12)
  6. Brown GA, Vukovich MD, Reifenrath TA, et al. Effects of anabolic precursors on serum testosterone concentrations and adaptations to resistance training in young men. Int J Sport Nutr Exerc Metab 2000;10:340-59.
  7. Antonio J, Uelmen J, Rodriguez R, Earnest C. The effects of Tribulus terrestris on body composition and exercise performance in resistance-trained males. Int J Sport Nutr Exerc Metab 2000;10:208-15.
  8. Jiao DH, Ma YH, Chen SJ, et al. Resume of 400 cases of acute upper digestive tract bleeding treated by rhubarb alone. Pharmacology 1980;20 Suppl 1:128-30.
  9. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  10. Ellenhorn MJ, et al. Ellenhorn's Medical Toxicology: Diagnoses and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams & Wilkins, 1997.
  11. Anonymous: Carctol. http://www.canceractive.com/page.php?n=534 (accessed on 08.05.12)
  12. Ernst E. Carctol: profit before patients? Breast Care 2009;4:31-3.
  13. Anonymous: Carctol. http://treatmentoptions.tripod.com/id5.html (accessed on 08.05.12)
  14. Anonymous: Carctol. http://www.healthcreation.co.uk (accessed on 08.05.12)
  15. Bown D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995.
  16. Klotter J. Carctol. Townsend Letter Feb/March 2005. http://findarticles.com/p/articles/mi_m0ISW/is_259-260/ai_n10018573/ (accessed on 08.05.12)