Updated on August 24th, 2023
Although CBD does not treat cancer, CBD and cancer often go hand in hand. Patients use CBD to mitigate pain, nausea, depression caused by the disease, or conventional treatment. However, numerous scientific studies and anecdotal reports show that its counterpart – THC – does fight cancer growth.
Does weed cure cancer is what we will try to answer in this article.
A combination of CBD and THC oil (aka cannabis oil, RSO & weed oil) shows promising results in many patients worldwide. On the other hand, conventional drugs like chemotherapy have a poor track record in side effects and overall results.
In this article, we mean delta-9 THC when we talk about THC. But recently, another THC entered the market, one with more substantial health effects than CBD but less impairing effects than delta-9 THC. It is called delta-8 THC.
What is Cancer?
To understand the benefits of CBD for cancer, we must first clarify what cancer is and how it occurs.
Cancer starts when the body’s cells begin uncontrollably dividing. This leads to tumors, which can cause an array of complications. The symptoms and prognosis depend on the cancer type in question.
It is also possible for some cancers to spread to other tissues.
A 2017 study, published in Science Translational Medicine (1), revealed that certain types of chemotherapy boost metastasis and increase the number of tumor cells circulating in the bloodstream.
Medscape states that 1 in 2 males (2) in the U.S. will develop some kind of cancer during their lifetime.
Actual risk varies from one individual to the next, so the above estimate is based on averages. Sadly, many will still fall victim to the disease and be sent for chemotherapy.
Perhaps the most alarming fact about conventional cancer drugs is that chemotherapy does not work 97% of the time (PDF).
Difference between THC & CBD
While THC remained in the spotlight for quite some time, many discoveries regarding CBD for cancer have been made.
THC and CBD are arguably the best-known cannabinoids from the marijuana and hemp plants. In terms of classification, hemp, and marijuana fall under the cannabis umbrella. However, “cannabis” became synonymous with “marijuana” over time, while we now see hemp as a category of its own.
Short for tetrahydrocannabinol, this chemical creates the “high” made famous throughout pop culture. When consumed, it results in cognitive and motor impairment and various other potential side effects.
Users often enjoy this experience due to the euphoria and relaxation it provides.
CBD stands for cannabidiol. The most glaring difference between CBD and THC is that the former has non-impairing. This allows people to take large amounts of CBD at any time of the day without worrying about their performance suffering.
CBD also offers a slew of medicinal benefits. Many of these benefits overlap with THC.
Many people associate THC exclusively with Indica, Sativa, and hybrid plants, while hemp is known primarily for CBD. However, the lines are not so clear-cut.
In reality, breeders have created marijuana strains that are almost entirely composed of CBD. Most hemp plants naturally contain less than 0.3% THC, which is the legal limit for selling non-prescription hemp products.
However, there are medical marijuana strains that are containing as little as 0.1% THC. So, what is the best cannabis strain for cancer?
The Impact of THC and CBD on Cancer
The CBD (Cannabidiol) effect amplifies cannabinoid receptors’ functions, improving the effectiveness of THC and other cannabinoids. Consequently, patients should use a combination of THC and CBD for the best results.
CBD for pain relief also helps with nausea, anxiety, and vomiting – a solid reason for people to seek CBD aid for cancer. However, CBD also has many other health benefits.
We compared the different hemp (CBD) products and made a pie chart of their exact cannabinoid profile to make this easier. For more information, please check out CBD Vape Oil for Pain relief and The Best CBD Vape Oil for Anxiety relief.
In 1978, lab tests on mice revealed a significant tumor reduction after 10 or 20 days of treatment with THC. It seems like cancer is one of the most researched diseases concerning THC and CBD.
We compiled some of this research in the “Scientific Studies” section of this article for convenience.
CBD Oil for Pancreatic Cancer
Following a study in 2008 about cannabinoids and their effects on pancreatic cancer, researchers found that CBD may affect the prognosis and pain levels of PDAC patients. However, in the summer of 2018, a collaborative study by Britain’s Queen Mary University of London (QMUL) and Australia’s Curtin University made an exciting discovery.
They examined the survival rates of patients with pancreatic cancer. They observed that mice treated with CBD combined with GEM (a common chemotherapy drug to treat PDAC) lived three times longer than mice only treated with Gemcitabine. A good indication that CBD and pancreatic cancer research has potential.
The study, led by Professor Marco Falasca, mentions that patients with pancreatic cancer – one of the most aggressive cancers – have only a 5% 5-year survival rate. This meager survival rate has not changed for the last 40 years.
Due to the pancreas’ location close to other organs, pancreatic cancer causes severe pain that doctors often cannot control with regular pain medication. The analgesic properties of cannabidiol provide an alternative solution.
Furthermore, CBD is known for mitigating chemotherapy side effects, such as nausea, vomiting, etc.
As a result, this could improve the overall quality of life for pancreatic cancer patients.
From Dr. Peter Glidden’s book, “The MD Emperor has no clothes”.
- Does the therapy you’re recommending cure my cancer?
- What caused my cancer?
- If the treatment you’re recommending doesn’t cure my cancer, what can I expect?
- What side effects of the treatment can I expect?
- Can the treatment give me cancer?
- In what way are you going to manage the side effects of the treatment if they happen?
- What’s going to happen to the quality of my life while I’m undergoing this treatment?
- Are you going to profit from this treatment, and if so, how much?
- How much is the hospital going to profit from this treatment?
- Can I talk to 5 different patients in my same demographic, with the same cancer type, who had the same treatment, to see how they’re doing?
“Chemotherapy doesn’t work 97% of the time.”
“Medicine in the United States is a FOR PROFIT industry and most people are completely unaware of this” Dr. Peter Glidden, BS, ND
A notable 2012 medical article entitled Marijuana Fights Cancer and Helps Manage Side Effects is one of the most compelling pieces in favor of cannabis for cancer. It describes how a young Spanish biologist in 1998, Cristina Sanchez, discovered that cannabis (THC) kills cancer cells.
Following that 1998 discovery in Madrid, other scientific lab tests independently confirmed Sanchez’s findings that cannabinoids were not just meant to mitigate cancer symptoms.
In a 2010 scientific study, scientists could prove that Delta(9)-THC and cannabidiol acted synergistically to inhibit cell proliferation.
Dr. Manual Guzman led a team of Spanish scientists organized in 2006 for the first clinical trials concerning cannabis and cancer. Most noteworthy is that they treated nine brain tumor patients with pure THC. These patients had otherwise failed to respond to the typical brain cancer treatments at the time.
A Silenced Breakthrough on THC and CBD for Cancer
The results were astonishing and should have caused a medical breakthrough. All test subjects showed significantly reduced tumor cell proliferation. Consequently, it was published in the British Journal of Cancer, 27 June 2006.
In 2010, a new clinical trial was carried out by JR Johnson. He compared the efficacy of a THC-CBD mixture vs. THC only vs. placebo in patients with intractable cancer-related pain. As a result, the trials proved that the THC-CBD mix was significantly more effective than both THC and placebo.
Obstacles to Marijuana Research
“I am currently treating pro-bono over one hundred patients using medical cannabis” – Dr. Debra Kimless, MD.
Until recently, legal hurdles associated with the plant cannabis crippled research. Once medical marijuana became mainstream, so did the information about THC and CBD.
Pushback from the pharmaceutical industry (“Big Pharma”) and governments has not helped either.
Anecdotal Evidence on THC and CBD for Cancer
There is a lot of anecdotal evidence of people self-medicating and curing themselves of cancer with cannabis. The stories are so widespread – yet so consistent – that it is impossible to ignore the potential of THC and CBD for cancer.
One of the best-known anecdotal cannabis advocates is Corrie Yelland. In 2011, doctors diagnosed her with anal cancer and told her that she only had two to four months to live. Instead of taking the radiation therapy doctors recommended, she self-medicated with cannabis and was declared cancer-free a year later.
Read our detailed explanation about (THC) cannabis oil usage and dosing.
THC Oil Dosage for Cancer
Many cancer patients achieved positive results with a cannabis THC oil dosage of 1 gram or 1000 milligrams per day. This is quite a high dosage. Patients should not start at this level, as the psychotropic effects will be overpowering.
You need to build it up for three to five weeks using the Rick Simpson oil dosage roadmap. Besides the oral RSO dosage, we dedicated a chapter on skin cancer, as you can apply the best CBD oil for skin cancer directly on cancer-affected skin.
The RSO process itself takes ninety days, with a total of 60 grams of THC oil. The most common way of taking THC oil is sublingually (under the tongue) or orally. The key is to bring the oil as close to the cancer source as possible.
As a result, patients may prefer to use anal or vaginal suppositories, depending on the cancer form. You can buy them in dispensaries or online and use THC and CBD suppositories for cancer.
Canadians can order cannabis tinctures online at the partners approved by iDWeeds for some time now. They only ship inside Canada and could even find 1000mg THC gummies.
But Americans will be glad to learn that there is marijuana oil for sale online in the USA recently. If you live in a state where online sales became legal, you can buy THC oil drops from your couch.
Vaping for Lung Cancer
The closer you can bring cannabinoids to the cancer sources, the more effective they are. For cannabis and CBD oil lung cancer treatment, therefore, patients should vape. But you can also vape cannabis and CBD in the form of dry herb.
Some people ask does marijuana cause cancer when smoking. There is no direct evidence for this, but smoking marijuana also causes toxins to be inhaled, so we don’t recommend it.
This way, the cannabinoids come in direct contact with the lungs, speeding up the process. Concentrates like dabs or wax can also be vaporized, but their concentration level is much higher. Read here about the differences between cannabis wax vs. oil.
Please keep in mind that isolates contain only THC or CBD. It would help if you used isolates in conjunction with another product containing the missing cannabinoids.
Get the right vaporizer since most of them are made for one purpose only; however, some have modular attachments designed to support various intake methods.
Hemp CBD Oil Dosage for Cancer
The reported dosage is at least 100 mg cannabidiol per day; however, cancer patients might take several hundred milligrams of CBD per day. It is best to start with 100 mg, monitor the symptoms, and increase with, for example, 50 mg increments.
Dosages for Chemotherapy
Taking CBD for cancer mitigates the pain and also some of the psychotropic effects of the THC oil. Therefore, by increasing CBD, patients should also see a reduction of at least those two symptoms. If chemo or radiation is involved, the CBD for cancer starting dose would be much higher (a couple of hundred milligrams) to mitigate the pain, damage, and nausea caused by these intense procedures.
Oil is not the only oral option for those who use CBD for cancer. There is the option of a full spectrum CBD tincture one to three times daily. Place the drops under the tongue. Wait 60-90 seconds and then swallow.
Tinctures are often flavored; however, you can add flavorless ones to any food or drink without altering the taste.
Calculating CBD Drops
Ensure you are buying a high-strength CBD; otherwise, the number of drops you need to take might be very high. For those who don’t know how to calculate CBD content, we have made an iDWeeds CBD calculator.
Taking more is not harmful, so you can and should experiment, as almost everyone is different. But if you don’t want to ‘drink’ one bottle of pure CBD oil after the other -due to your high dosage requirement- you might want to try the best CBD concentrate. Where to buy CBD for cancer, you can read in this article.
Can I Overdose CBD?
There is no need to worry about an overdose when taking the best CBD for cancer (or any other reason). A CBD overdose is practically impossible. Science has established that individuals can consume CBD doses of 1500 mg per day (3).
To this day, there are no recorded cases of deaths caused by CBD or THC overdose. Years of research on the topic showed no fatal overdose level (4) with cannabis use – at least not one you could achieve as a human being.
However, “Big Pharma” often hurries their products through the approval process in as little as three weeks. This has led to some tragic results.
CBD for Animals
Some pet owners give pet CBD oil to their pets for cancer, as they can have cancer or virtually any other human disease. Arthritis, heart disease, HIV, and epilepsy are just a few conditions dogs and cats share with us.
This, of course, is difficult news for dog owners; however, according to research, the CBD treats for dogs proved effective at mitigating pain while reducing nausea, vomiting, and other symptoms present in dog cancer patients.
Private label hemp oil pets and other products are available for businesses as a custom-made white label opportunity.
Success Stories of Cancer Patients
We carefully collected CBD oil cancer testimonials to serve as proof and inspiration to others. Do not hesitate to record your own experience and share it with us to help thousands of more patients.
Eye-opening Documentaries about Cancer
Overview of Scientific Studies and Reports
If you are interested in the medical proof and not scared of reading through some professional medical jargon, check out the studies below.
Scientific Research Studies on CBD, Cannabis and Cancer
2000 – 2014
- 2004/00 – The contribution of cytotoxic chemotherapy to 5-year survival in adult malignancies
- 2006/07 – A pilot clinical study of Δ9-tetrahydrocannabinol in patients with recurrent glioblastoma multiforme
- 2008/11 – How Effective Is Chemo Therapy?
- 2010/04 – CBD inhibits cancer cell invasion
- 2012/11 – Cannabidiol inhibits angiogenesis by multiple mechanisms
- 2013/04 – The inhibitory effects of CBD on systemic malignant tumors
- 2013/02 – CBD as potential anticancer drug
2015 – 2020
- 2014/03 – Chemotherapy Dot NOT Work
- 2016/03 – In vitro and in vivo efficacy of CBD
- 2017/01 – The Influence of Biomechanical Properties and Cannabinoids on Tumor Invasion
- 2001/08 –Inhibition of Glioma Growth in Vivo
- 2004/03 – Antitumor effects of CBD on human glioma cell lines
- 2004/08 – Cannabinoids Inhibit the Vascular Endothelial Growth Factor Pathway in Gliomas
- 2004/10 – Pot’s cancer healing properties
- 2005/04 – CBD inhibits human glioma cell migration through a cannabinoid receptor-independent mechanism
- 2006/01 – THC in patients with recurrent glioblastoma multiforme
- 2006/07 – THC tested against brain tumor in pilot clinical study
- 2006/08 – Cannabinoid receptors in human astroglial tumors
- 2010/01 – Cannabidiol enhances the inhibitory effects of THC
- 2013/03 – Key regulator of glioblastoma aggressiveness
- 2013/01 – Triggering of the TRPV2 channel by CBD sensitizes to chemotherapeutic agents
- 2013/08 – Local delivery of cannabinoid-loaded microparticles inhibits tumor growth
- 2013/10 –CBD inhibits proliferation and invasion in glioma cells through a multitarget effect
- 2014/01 – Systematic review of the literature on clinical and experimental trials on the antitumor effects of CBD
- 1998/07 – Anandamide inhibits human breast cancer cell proliferation
- 2006/05 – THC and prochlorperazine effective in reducing vomiting in women following breast surgery
- 2006/06 – Cannabidiol inhibits tumor growth in leukemia and breast cancer
- 2006/09 – Antitumor activity of plant cannabinoids with emphasis on the effect of cannabidiol on human breast carcinoma
- 2006/07 – 9-Tetrahydrocannabinol Inhibits Cell Cycle Progression in Human Breast Cancer
- 2006/09 –Plant Cannabinoids’ Antitumor Activity
- 2007/11 –CBD as a novel inhibitor in aggressive breast cancer cells
- 2011/07 – Programmed cell death in breast cancer cells induced by Cannabidiol
- 2011/08 – Pathways mediating the effects of CBD on the reduction of breast cancer cell proliferation, invasion, and metastasis
- 2012/11 – Cannabidiolic acid is an inhibitor of breast cancer cell migration
- 2005/07 – Anandamide, induces cell death in colorectal carcinoma cells
- 2011/11 – Induction of apoptosis by cannabinoids in prostate and colon cancer cells is phosphatase-dependent
- 2012/08 – Chemopreventive effect of CBD on experimental colon cancer
- 2008/05 – A comparative study on CBD-induced apoptosis in murine
- 2008/06 – Endocannabinoids in endocrine and related tumors
- 2011/07 – THC reduces the viability of human HCC cell lines and reduced their growth (US National Library of Medicine)
- 2006/05 – No association between lung cancer and cannabis smoking in large study
- 2006/05 –Marijuana Smoking Found Non-Carcinogenic
- 2008/01 – Delta(9)-Tetrahydrocannabinol inhibits lung cancer cell migration
- 2010/10 –Decrease of plasminogen activator inhibitor-1 may contribute to the anti-invasive action of CBD on human lung cancer cells
- 2012/04 –CBD inhibits lung cancer cell invasion and metastasis via intercellular adhesion molecule-1C
- 2012/10 – Media ignored expert’s shocking findings that marijuana helps prevent lung cancer
- 2013/01 – COX-2 and PPAR-γ confer cannabidiol-induced apoptosis of human lung cancer cells
- 2010/06 – Cannabinoids are potent cellular respiration inhibitors and are toxic to highly malignant oral tumors (US National Library of Medicine)
- 2010/02 – Study of the efficacy, safety, and tolerability of THC:CBD extract and THC extract in patients with cancer-related pain
- 2011/09 – Marijuana extract helps prevent chemo pain
- 2012/05 – Nabiximols for opioid-treated cancer patients with poorly-controlled chronic pain
- 2006/07 – Cannabinoids Induce Apoptosis of Pancreatic Tumor Cells (The American Journal of Cancer)
- 2008/02 – Cannabinoids in pancreatic cancer: Correlation with survival and pain
- 2018/07 – GPR55 signaling promotes proliferation of pancreatic cancer cells and tumor growth in mice
- 2011/11 – Induction of apoptosis by cannabinoids in prostate and colon cancer cells is phosphatase-dependent
- 2013/01 –Use of non-psychoactive cannabinoids for prostate cancer
- 2014/07 –In Vitro Anticancer Activity of Plant-Derived Cannabidiol on Prostate Cancer Cell Lines
Sources: https://www.fda.gov/newsevents/publichealthfocus/ucm484109.htm https://www.coloradopotguide.com/colorado-marijuana-blog/article/what-is-a-marijuana-tolerance/ https://tonic.vice.com/en_us/article/evq747/high-changes-as-you-get-older-weed-week https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4742341/ https://potguide.com/pot-guide-marijuana-news/article/exploring-the-effects-of-marijuana-in-men-vs-women/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3492530/ https://thehurtguru.com/2017/02/01/6-steps-how-to-control-your-thc-tolerance/ https://www.hellomd.com/health-wellness/5b4536628904b90007731aca/the-benefits-of-building-up-your-cannabis-tolerance https://www.greenentrepreneur.com/article/339066