Juicing Raw Cannabis: The Claims and the Evidence

Juicing raw cannabis means blending or pressing fresh, unheated leaves and flowers and drinking the juice. Its supporters say this delivers large amounts of cannabinoids without the “high”, because the plant’s main compounds are still in their acid forms, THCA and CBDA, which are not intoxicating until heated. The idea was popularised around 2012 by Californian physician William Courtney, who promoted raw cannabis as a daily “dietary” food. The short answer on the evidence: the chemistry behind the no-high claim is broadly right, but there are no clinical trials showing that raw cannabis juice prevents or treats cancer, heart disease, diabetes or any other illness.

Below we set out what was claimed, what the science actually supports, and the safety and legal points anyone curious about cannabis should know. This is general information, not medical advice. If you are thinking of using any cannabis product for a health reason, talk to a doctor first.

What the raw cannabis diet promised

Courtney, a California doctor, and Kristen Courtney argued that people should treat cannabis as a vegetable. In the version of his advice published by the health site Prevent Disease in December 2012, he suggested drinking a few ounces of juice from raw leaves and buds each day, alongside hemp seed sprouts, and claimed that unheated cannabis could be taken in doses of hundreds of milligrams of cannabinoids without intoxication.

The article that spread the idea went much further. It claimed that cannabinoids prevent cancer, cut heart attacks by 66 percent and insulin-dependent diabetes by 58 percent, protect the brain, lower blood pressure within hours, and are needed daily by everyone over forty. It also offered dosing figures, juicing tips and advice that people on heart, epilepsy, blood pressure or antipsychotic medicines needed more cannabis, not less.

Kristen Courtney explained the appeal in one line that is still widely quoted: “The amount of Cannabinoids we need would be difficult to get through smoked Cannabis without feeling the intoxicating effects.” That is the heart of the raw cannabis argument: if the high is the limiting factor, removing it lets you take far more.

The chemistry: why raw cannabis does not make you high

The living cannabis plant makes cannabinoids mainly in acid form. The best known is tetrahydrocannabinolic acid, or THCA. On its own, THCA is not considered intoxicating. When cannabis is dried, stored for a long time or, above all, heated by smoking, vaping or baking, THCA loses part of its structure in a reaction called decarboxylation and becomes THC, the compound that causes the high. The same happens to CBDA, which becomes CBD.

So the core claim that fresh, unheated cannabis juice produces little or no high is broadly consistent with the chemistry. Two caveats matter. First, conversion is never perfectly clean: dried or stored plant material already contains some THC, and heating leaves or juice changes the picture entirely. Second, the human body itself appears to convert very little THCA into THC, which is good news for avoiding intoxication but also means the acid forms behave as different substances from the better-studied THC and CBD.

The original article also leaned on the endocannabinoid system, a real network of receptors and signalling molecules that helps regulate processes such as mood, appetite, pain and inflammation. Its claim that most people suffer a “cannabinoid deficiency” that daily cannabis can correct, however, is a hypothesis, not an established medical condition.

What the evidence actually shows

Cancer. The US National Cancer Institute states that the Food and Drug Administration has not approved cannabis or cannabinoids as a treatment for cancer. Laboratory and animal studies have produced interesting results, but that is the stage before human testing, and the NCI found no ongoing human trials of cannabis as a cancer treatment. Two cannabinoid medicines, dronabinol and nabilone, are approved for nausea and vomiting caused by chemotherapy, and only for patients who have not responded to standard anti-nausea drugs.

Raw acid cannabinoids. Research on THCA is still mostly at the level of cell and laboratory studies, looking at effects such as inflammation. As of today there are no established medical uses for it.

CBD. The best-studied use is for epilepsy. A purified CBD medicine, Epidiolex, was approved by the FDA in 2018 for seizures linked to Lennox-Gastaut syndrome and Dravet syndrome, and later for tuberous sclerosis complex. For anxiety, pain, addiction and many other conditions, the evidence is still too weak to draw firm conclusions. A randomised trial of CBD oil in 144 people with advanced cancer found no difference from placebo in symptom relief.

Heart disease and diabetes figures. Numbers such as “66 percent fewer heart attacks” and “58 percent less diabetes” do not come from trials of cannabis juice. Statistics of this kind usually come from surveys comparing people who report using cannabis with those who do not. Such studies can spot associations but cannot show that cannabis caused the difference, because users and non-users differ in many other ways. We could not confirm the source of the heart attack figure at all.

Blood pressure. Cannabis can lower blood pressure and raise heart rate, which the NCI lists among its possible side effects. A drop in blood pressure is not automatically a benefit, and it can cause dizziness or fainting, especially in older people or those on blood pressure medicines.

Safety concerns the raw cannabis movement played down

• Drug interactions. The suggestion that people on epilepsy, heart, antipsychotic or blood pressure medicines should take more cannabis is unsafe. CBD, for example, affects liver enzymes that break down many medicines and is known to raise levels of the epilepsy drug clobazam. Anyone taking prescription medicines should talk to their doctor before using any cannabis product.
• Liver effects. Regulators have raised concerns about possible liver injury from CBD, particularly at high doses or alongside other medicines.
• Mental health. The CDC warns that people who use cannabis are more likely to develop psychosis and long-lasting disorders such as schizophrenia, with the risk higher in those who start young and use often. Cannabis use is also associated with depression and anxiety.
• Accidental intoxication. The original article itself admitted that heated juice or concentrated buds can deliver very large doses of THC. Its suggested daily intake of around 50 mg of THC is far more than an inexperienced person can tolerate, and high doses can cause confusion, panic, a racing heart and loss of coordination.
• Dependence. The NCI notes that cannabis and cannabinoids can be addictive, with withdrawal symptoms such as irritability, restlessness and poor sleep.
• Pregnancy and young people. Health authorities advise against cannabis use during pregnancy and breastfeeding and by teenagers, whose brains are still developing.

Hemp, CBD products and the law

The original piece treated all cannabis, from fibre hemp to high-THC strains, as the same food, and pointed readers to seed sellers and growers. In reality the law draws sharp lines. Hemp is cannabis bred to contain very little THC, and in many countries it can be grown and sold legally for fibre, seeds and oil. Hemp seed and hemp seed oil are ordinary foods and contain only traces of cannabinoids.

Fresh cannabis leaves and flowers are a different matter. Depending on where you live, possessing or growing them may be legal, allowed only for registered patients, or a crime. Even in the United States, where hemp-derived products are widely sold, the FDA has said CBD is not approved as a dietary supplement and cannot legally be added to food, and the legal status of products rich in THCA is contested and changing state by state. Check the rules where you live before buying or growing anything.

Myths and facts at a glance

Myth: cannabis is a vegetable containing every essential nutrient we need. Hemp seeds are genuinely nutritious, with protein and healthy fats, but cannabis leaves are not a complete food and cannabinoids are not essential nutrients.

Myth: raw cannabis prevents cancer. No human study has shown this, and the NCI does not recognise cannabis as a cancer treatment.

Fact: unheated cannabis is far less intoxicating than smoked or cooked cannabis. The acid forms of THC are not considered psychoactive until heat converts them.

Myth: more is always better if you do not get high. Large doses of any active compound can cause side effects and interactions, whether or not they make you feel intoxicated.

Fact: some cannabinoid medicines work. Prescription products for chemotherapy nausea and certain severe epilepsies have passed proper trials. They are given at measured doses under medical supervision, which is very different from drinking homemade juice.

Raw cannabis juice remains an interesting idea with plausible chemistry and very little clinical evidence. If you are drawn to it because you are living with a serious illness, the most useful step is a frank conversation with your doctor about what is known, what is not, and what might interact with your treatment.

Sources: National Cancer Institute: Cannabis and Cannabinoids (PDQ); CDC: Cannabis and Mental Health; Wikipedia: Tetrahydrocannabinolic acid; Wikipedia: Cannabidiol. Original article by Alyx S. Kerr, published by Prevent Disease (2012), quoting Dr William Courtney and Kristen Courtney.

Related:

• Cannabis and Cancer Research: Laboratory Findings Are Not Proof of a Cure
• Cannabis Oil and Cancer: Why Universal Cure Claims Are Unsupported