Contribute to Our External Cancer Tracking Program

CannaReps is conducting a longitudinal observational study that follows individuals who are choosing on their own accord to use decarboxylated cannabis oil (a.k.a. phoenix tears) as a topical treatment for external cancerous tumors and/or lesions. If you or someone you know is choosing this form of treatment, this study is an opportunity contribute to the understanding of how cannabis may be used to treat external forms of cancer.

Research invitation

Date: August 10, 2017
Project Title: Topical Use of Decarboxylated Oil for External Cancer Study
Principal Investigator:

Adolfo Gonzalez C.
CannaReps Research Initiatives
Cell: 604 499 2808

You are invited to participate in a research study that focuses on collecting data from members of the public who are using decarboxylated cannabis oil as a topical treatment for an external form of cancer. This research is being conducted by CannaReps – a cannabis product safety training and industry improvement organization founded and operated by Adolfo Gonzalez in Vancouver, BC. Adolfo  has over a decade of experience working with medical cannabis users and conducting survey based assessments.


The purpose of the External Cancerous Tumor or Lesion Tracking Program  is to track changes in the size of externally visible cancerous tumors or lesions as clients use decarboxylated cannabis oil as a topical treatment. A secondary objective is to collect more data in regards to the specific type of oil being used and methods being implemented by members of the public who choose this form of medication.


As a participant, you will be asked to answer a few questions about the specific product and method of application. You will provide this information  via the study survey and you will be asked to provide measurements and pictures of the tumor or lesion over time. It is key that participants answer the same set of questions on several occasions throughout their treatment in order to effectively observe any changes that may occur.  More in-depth interviews may be conducted with some clients, in which case researchers will reach out to you via your contact email.

The research methods include the use of survey forms,  photographic documentation and potentially some follow up interviews. Participation will take approximately  3-5 minutes each time the survey is filled, including the time it takes to take measurements and take a picture. Forms can be submitted via our online survey form:


Due to the nature of this research, the plan is to collect pictures and measurements of the affected site, without need to include faces, unless the affected area is on or near the face, in which case we will blur face if the image is ever published.

You will be required to click “ok” as a form of signing off on your media release and release of liability forms each time you fill out your questionnaire online. Please make sure to read carefully before clicking “ok”.


Participation in this study is voluntary. If you decide to take part in the research,  you can decline to answer any questions or decline to participate in any component of the research.  You can also decide to withdraw from the study at any time without giving a reason, or to request the withdrawal of your contributions to the data. You may do so without any penalty or loss of benefits to which you were entitled to receive prior to the start of the research. The researchers aim to provide information for you about what to expect at all stages of the research.


Possible benefits:

By participating in this study you may contribute to building a better understanding of whether or not there is a correlation between the external application of decarboxylated cannabis oil and changes in the size of cancerous tumors or lesions. You will also help to bring light to the type of products being chosen by those suffering from external forms of cancer and how they use these products.

Keep in mind:

Clients participating in study are individuals who choose on their own accord to use decarboxylated cannabis oil topically as a form of treatment for their cancer; this study simply aims to keep a record of this self-guided process. Any benefits or lack thereof obtained during the topical application of decarboxylated cannabis oil is therefore a result of the participants own choice in treatment rather than being a result of participating in this study. Participating dispensaries and individuals need to keep in mind that the investigators behind this study make no medical claims in regards to the effectiveness of the topical use of decarboxylated cannabis oil as a treatment for external forms of cancer.

There also may be risks associated with participation:

Keep in mind that in Canada, dispensaries and the high concentration decarboxylated oils they sell are still illegal according to Canadian federal law. There is always a risk involved in purchasing and using illegal goods from unregulated markets. The author of this study recommends that participants ensure that the oil they choose to purchase is laboratory verified for potency and purity by contacting the product makers and asking for COA’s (Certificates of Analysis) for the product in question. Product content and purity verification is less of a concern in most US states, where decarboxylated oils are legal and regulated according to state law.  There is also the risk that participants may have unrealistic expectations in terms of the efficacy of the treatment that this study focuses on. Keep in mind that the researchers and the participating dispensary organizations make no claims in terms of the effectiveness of the self-administered experimental treatment being studied.


All of the information that you provide to this study is considered to be confidential. The information collected may include the following:

  • Email for the purposes of contacting you in regards to the study only
  • Your responses to survey and/or interview questions
  • Audio recording of ay interviews
  • Photographs of the affected area(s)

During the course of this research the research team will only retain your email contact information for the purpose of contacting you. Your name and contact information will not be linked to the aggregate data set used for publication purposes.


The results may be self published by CannaReps and/or published in a peer reviewed journal.You will be able to access the results of the study by contacting the principal investigator:

  • Email:
  • Phone: 604-499-2808

Please do not hesitate to contact the lead investigator if you have any further questions in regards to this study.