Reviewed on 6/11/2021
Other Name(s):

Carcalon, Drug X, Substance X.


Krebiozen was a commercial product claimed to have been prepared from the blood of horses previously injected with bacteria. It was later determined that Krebiozen was simple mineral oil that contained the dietary supplement creatine.

People take Krebiozen for bladder cancer, breast cancer, cervical cancer, and other types of cancer.

How does it work?

There isn't enough information to know how Krebiozen might work as a medicine.


Next to red peppers, you can get the most vitamin C from ________________. See Answer

Uses & Effectiveness

Insufficient Evidence to Rate Effectiveness for...

More evidence is needed to rate the effectiveness of Krebiozen for these uses.

Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).

Side Effects

It isn't known if Krebiozen is safe. Side effects might include pain and mild jaundice.


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Special Precautions & Warnings

Pregnancy and breast-feeding: Not enough is known about the use of Krebiozen during pregnancy and breast-feeding. Stay on the safe side and avoid use.


The appropriate dose of Krebiozen depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for Krebiozen. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Health Solutions From Our Sponsors


Anon. STATUS report on "krebiozen". J Am Med Assoc 1951;147(9):864-873. View abstract.

Holland JF. The krebiozen story. Is cancer quackery dead? JAMA 1967;200(3):213-218. View abstract.