Does CBD Oil Lower Blood Pressure? What the Research Says
With stress in the U.S. on the rise, it’s no wonder more than half of Americans suffer from high blood pressure.
CBD oil has been hailed as a cure-all for a variety of conditions, but what do researchers have to say about CBD oil and blood pressure?
Does CBD oil lower blood pressure, or is it an unfounded claim? Is it possible to skip the burdensome doctors’ visits and expensive trips to the pharmacy?
We wouldn’t go that far. Hypertension is a risk factor in heart attack, stroke and type 2 diabetes. Even though it’s common, it’s a serious issue which require medical attention.
However, there are many steps you can take to naturally reduce your blood pressure, one of which may be by using CBD oil for hypertension.
What is Hypertension?
Hypertension is the medical term for high blood pressure. As blood is pumped through your blood vessels, they undergo a degree of force. If you have high blood pressure, this force can damage the walls of your blood vessels, veins and arteries.
When you visit the doctor, you’ll usually hear your blood pressure described by two numbers, like 120/70.
The first number refers to the systolic pressure, the pressure exerted when the heart contracts and pumps blood into the arteries. The second is the diastolic pressure, measured when the heart muscle relaxes between beats. In cardiology, a systolic pressure of 140, and/or a diastolic pressure of 90, is considered the boundary between normal and high blood pressure.
High blood pressure can lead to cardiovascular complications such as heart disease, heart attack, stroke, aneurysm and heart failure. The condition is exacerbated by type 2 diabetes, stress, anxiety, inflammation, high cholesterol levels, insomnia, a diet high in salt, and alcohol and tobacco use.
Lowering High Blood Pressure: CBD and Blood Pressure
High blood pressure can be naturally lowered by reducing stress, salt intake, and consumption of alcohol and tobacco. You can also lower your blood pressure by exercising regularly and eating more fruits and vegetables.
Your doctor may prescribe medications that can lower blood pressure. Many of these medications, such as calcium channel blockers and ACE-inhibitors, cause side effects like headaches, dizziness, constipation and swollen ankles. That has naturally sparked interest in non-prescription treatments for high blood pressure.
New evidence links CBD to a decrease in blood pressure. For many people, CBD oil has fewer side effects than prescription medications, too.
We spoke with Rebecca Park, registered nurse and founder of RemediesForMe.com, who told us that CBD oil tinctures made using hemp have very few side effects and are generally well tolerated.
If you are already on high blood pressure medications, however, consult your physician before using CBD oil as there may be interactions.
What is CBD Oil?
Cannabidiol, better known as CBD, is a non-psychoactive phytocannabinoid, which is a cannabinoid found in the two forms of cannabis, marijuana and hemp plants.
Commercially-available CBD oil is cannabidiol extracted from the hemp plant, often mixed with coconut or hemp oil. Unlike its marijuana-derived counterpart, this CBD oil does not contain high levels of tetrahydrocannabinol (THC), so cannabidiol does not get you high. Instead, most users report that it makes them feel relaxed and calm, among the other generally positive effects of CBD.
According to federal law, hemp-derived CBD oil is classified as having less than 0.3% THC, making it legal to purchase and use. And since hemp has minuscule amounts of THC content, CBD oil from this type of cannabis plant does not cause any of THC’s intoxicating side effects. Marijuana-derived CBD oil, whether it’s derived from sativa or indica-dominant plants, contains more than 0.3% THC as its primary active ingredient, and may make you high. It is only legal in states with recreational or medical marijuana legalization.
Though it comes in a wide variety of forms such as capsules, vape juice, powders, topical patches and lotions, and edibles like gummies, cannabidiol is most popularly consumed as a sublingual oil. You simply place a few drops of CBD oil under your tongue and let it sit for 30 to 90 seconds.
Pharmacology research has shown a wide range of potential benefits for cannabidiol. CBD oil is commonly used to treat or supplement treatment of medical conditions like chronic pain, inflammation, arthritis, multiple sclerosis, Parkinson’s disease and epilepsy. Park added that CBD oil is also commonly used by people suffering from a wide range of mental disorders.
“CBD can be effective in treating generalized anxiety disorder (GAD), social anxiety disorder, anxiety related insomnia, and post-traumatic stress disorder (PTSD),” she said.
Additionally, emerging evidence shows that CBD may use the same mechanism to treat high blood pressure as it does to reduce anxiety.
How CBD Interacts with the Endocannabinoid System and Body
The endocannabinoid system is a biological system in your body that allows cannabinoids to send and receive messages that control most of the body’s important functions. In fact, your body naturally produces cannabinoids every day.
This system has two main endocannabinoid receptors, called CB1 and CB2. THC binds directly to the CB1 receptors, affecting areas of the brain that influence memory, motor coordination and time perception, and to the CB2 receptors which affect the pain centers in your brain and manage inflammation in the body. The interaction between THC and the endocannabinoid system is what causes the psychoactive side effects that marijuana is best known for.
On the other hand, cannabidiol does not directly bind to the CB1 and CB2 receptors. Instead, it causes a number of indirect actions leading to therapeutic benefits, such as activating TRPV1 receptors that regulate pain, body temperature, and inflammation.
Does CBD Oil Lower Blood Pressure?
While Park told us that high blood pressure can be caused by a number of factors, CBD oil appears to lower increases in blood pressure caused by stress and anxiety.
She explained that when emotional or physical stress is high, our bodies release a hormone called cortisol. High levels of cortisol can raise blood pressure.
“CBD lowers blood pressure by reducing cortisol levels and dilating blood vessels, allowing more blood flow and leading to lower blood pressure,” Park said.
Park pointed to a study of 11 participants that showed CBD oil may lower the levels of cortisol produced in the body. This study showed that volunteers saw a significant reduction in cortisol production when given 300 mg and 600 mg of CBD compared to the placebo control.
In a famous 2017 randomized crossover study led by British doctor Khalid Jadoon and published in the Journal of Clinical Investigation (JCI), a single dose of 600 mg of CBD oil or a placebo was administered to nine healthy volunteers. The resulting data showed that acute administration of CBD reduced resting blood pressure compared to placebo dosing.
The patients were then given a series of stress tests to increase heart rate. Those who were given 600 mg of CBD had lower stress-induced blood pressure spikes than the control group.
It’s amazing, but it’s true. A single dose of cannabidiol lowered the blood pressure of patients, whether they were resting or under stress.
The sample size of these studies was small and further research is required to establish whether CBD has a role in the treatment of cardiovascular disorders, but the results are promising.
How CBD Can Help With Hypertension
As Park explained, high blood pressure can be caused by many factors. Fortunately, there are several health benefits of CBD that could indirectly help with hypertension.
Anxiety can lead to rapid heart rate and palpitations, leaving you at risk for high blood pressure and heart disease.
CBD oil has been shown to reduce anxiety in animal studies by the National Institute for Drug Abuse (NIDA). This study demonstrated that symptoms that accompany anxiety, like high blood pressure and rapid heart rate, were improved by use of CBD.
Inflammation doesn’t only occur in your joints. In fact, research shows that CBD oil can reduce inflammation in the heart and blood vessels in the brain.
Called a “vasorelaxant” by researchers, CBD oil’s anti-inflammatory properties may lower blood pressure by allowing the free flow of blood through your heart, arteries and veins.
According to the National Institutes of Health (NIH), acute pain can lead to high blood pressure. Because CBD acts on the pain receptors in the brain, the pain-relieving properties of CBD could lead to decreased blood pressure.
CBD Improves Sleep
As CBD reduces stress, you may see an increase in your quality of sleep and general wellness.
Sarah Polansky, owner and developer of the CBD brand Prismatic Plants, told Public Goods that “The more you take CBD and help to regulate your adrenals, the less likely you’ll feel fatigued as your body returns to a state of balance rather than constant stress.”
She added, “This means your need for caffeine consumption could decrease and your quality of sleep could improve, which has a waterfall benefit for increasing overall health.”
Choosing CBD Oil for High Blood Pressure
No prescription or documentation is needed for CBD oil. The only exceptions are the marijuana-derived CBD oil sold in dispensaries (in medical marijuana states, you’ll need a patient card to buy it) and a medication called Epidiolex, a CBD medication only available by prescription to patients suffering from some forms of childhood epilepsy.
All of the forms of CBD that you can buy over the counter are not generic products. Their effectiveness depends largely on the quality of the manufacturer producing it, and the type of CBD that’s used.
Many of the cannabidiol products you’ll see in CBD stores or online are of lower quality, since – as with any product – it’s more expensive to produce high-end merchandise and it sells for a higher price, often with lower profit margins for the vendors.
High-quality CBD oil, capsules, topicals, juice for vaping, or edibles will always produce a better result, so it’s best to do a little research to find reputable vendors who create effective products. Look for oil sourced from Colorado or West Coast organic hemp, extracted with high-end methods (like supercritical CO2 extraction), and containing only a small number of natural or organic ingredients required for flavoring or distributing the cannabidiol (the latter is done via MCT coconut carrier oil in high-quality CBD).
Some cannabidiol delivery methods work more slowly than others.
Capsules and edibles, for example, must make their way through the digestion process before the CBD can be released into the blood stream and carried throughout the body. Vaping or administration under the tongue make the cannabidiol available almost immediately, since it’s absorbed quickly by the sublingual glands or tissues in the lungs. And topical CBD usually doesn’t even make it into the bloodstream, since it’s blocked by the epidermis.
When shopping for CBD oil, you’ll find there are three different types to choose from.
- Full-spectrum CBD is the most effective. It contains all of hemp’s natural terpenes and flavonoids, as well as all of the cannabinoids in the plant – including the small amount of THC we’ve mentioned. They all work together in the so-called “entourage effect” that boosts CBD’s performance.
- Broad-spectrum CBD provides a slightly lower entourage effect, because the THC content has been removed from the cannabidiol before it’s processed and sold.
- CBD isolate goes a step further. All of the components of hemp except cannabidiol are removed, leaving only pure CBD in the final products.
Some people believe that pure cannabidiol does the most good, but in reality, there’s only one reason to avoid CBD that contains THC: it eliminates any chance of turning up dirty on a drug test for marijuana. In reality, very few full-spectrum CBD users ever test positive, but some people’s minds are set at ease by knowing there’s no THC in their body.
What’s The Best CBD Dosage for High Blood Pressure?
Because the FDA has not approved over-the-counter CBD products, there is no official recommendation for a dose of CBD. The right dose depends on your weight, genetics, sex and medical history. More studies need to be conducted with human subjects to get an accurate dosage.
Many CBD oils come in dropperful (1 ml) doses of 10 mg/ml. Cannabidiol affects different people, particularly based on the weight, metabolism and body type. However, Park said the effective therapeutic dose is usually in the range of 20 mg to 300 mg, or 2 to 30 dropperfuls.
In a 2018 study, researchers found that a dose of 300 mg was most effective for reducing anxiety in a simulated public speaking trial. Participants who took 150 mg or 600 mg did not receive the same benefit.
Meanwhile, in the previously-mentioned study of nine healthy volunteers, blood pressure was effectively lowered with a single dose of 600 mg.
The best way to determine how effective a dose of CBD will be for you is to start small and frequently check your blood pressure using an electronic cuff. Write down the dose you took and the time you took it, as well as your blood pressure reading. Over time, you should be able to obtain a clearer picture of what dose will help you achieve low blood pressure.
Park noted that, “If CBD works for you, without the use of other medications, I would say it is a great and safe alternative.” CBD may not be a replacement for exercise and a healthy diet, but it is nice to know you might be able to lower your blood pressure with a few drops of oil under the tongue.
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CBD oil seems to be a cure-all for many ailments, but does it lower high blood pressure? Here’s what research says about CBD and hypertension.
CBD Oil and Heart Failure
Could CBD oil ease your heart failure symptoms or help you manage your condition? This herbal supplement is sold over the counter and may be marketed with various health claims, but heart experts arenвЂ™t so sure itвЂ™s worthwhile or even safe if you have heart failure.
вЂњHeart failure patients should know that while CBD has been touted as a wonder compound and seems to be in almost everything these days, it has never been shown to have any significant cardiovascular benefits in human studies,вЂќ says Scott Lundgren, DO, a transplant cardiologist at Nebraska Medicine in Omaha.
What Is CBD Oil?
CBD oil contains cannabidiol, an herbal liquid supplement made from the cannabis plant. It doesnвЂ™t have the same effect on the brain as THC, another compound found in cannabis that gives you a вЂњhighвЂќ when smoked or eaten, says Larry Allen, MD, associate division head for clinical affairs in cardiology at University of Colorado Anschutz Medical Campus.
вЂњThere are no known cardiovascular benefits for cannabis or cannabidiol, and there may even be some adverse effects, so people should not take these products and think that it will have positive effects on their cardiovascular health,вЂќ says Allen, whoвЂ™s also co-author of the American Heart AssociationвЂ™s statement on all cannabis products.
In 2018, the FDA approved the first oral, purified CBD drug, Epidiolex, to treat seizures in two rare forms of epilepsy. Two synthetic versions of cannabidiol were later approved: dronabinol (Marinol, Syndros) for treatment of nausea during cancer chemotherapy and nabilone (Cesamet) to treat weight loss associated with AIDS.
Some of CBDвЂ™s proven benefits in other health conditions may be intriguing to people living with heart failure, Allen says.
вЂњDoes it stimulate your appetite? Yes. Do people gain weight if they take it? Possibly true. Patients with severe heart failure do have cachexia,вЂќ or severe weight loss and muscle wasting, he says. вЂњOne could argue that people with nausea, lack of appetite, or who are losing weight could think CBD would help them. People with heart failure have a fair amount of discomfort, including edema [swelling] and somatic or pain-related issues, so you could think CBD has a role.вЂќ
But there isnвЂ™t really any evidence to prove that it will relieve heart failure symptoms or be safe to use if you have heart failure, he adds.
What We Know About CBD
Some research suggests that CBD oil may improve some heart-related symptoms:
- A very small study conducted in 2017 in England found that CBD improved resting blood pressure and blood pressure spikes related to stress in people without heart conditions.
- Various studies in animals have shown that CBD could improve vasorelaxation, or opening of arteries for better blood flow, as well as reduce inflammation. A small clinical trial from Mexico studying CBD in people with heart failure hasnвЂ™t reported any results yet.
- A large study of more than 161,000 people hospitalized for heart failure who had used marijuana found that they had, on average, a lower risk of death and shorter hospital stays. But this doesnвЂ™t necessarily mean CBD oil would have the same benefit.
ItвЂ™s illegal in the U.S. to market CBD by adding it to any food or calling it a dietary supplement. Also, although the FDA has approved a few CBD drugs to treat certain diseases, donвЂ™t expect CBD sold over the counter to be safe or beneficial for heart failure, Lundgren says.
вЂњCBD oil may not have the same properties, and it can actually cause gastrointestinal distress like diarrhea or cause decreased appetite. CBD products can include unknown ingredients and may not be accurately labeled,вЂќ he says.
When you use CBD oil, your liver breaks it down. During this process, it could interfere with your medications for heart failure or other heart conditions. вЂњCBD has known interactions with warfarin, certain statins, calcium channel blockers, beta-blockers, and nitrates. Just because a supplement is вЂnaturalвЂ™ doesnвЂ™t mean that it is safe,вЂќ Lundgren says.
CBD May Have Health Risks
CBD oil must be studied in randomized clinical trials on people, not animals, before it can be considered safe or effective for heart failure, Lundgren says. Until that happens, he advises against buying or using CBD. вЂњThere is some evidence that CBD can cause liver injury as well as lead to male infertility issues. When consumed with alcohol, individuals may experience increased drowsiness, which can lead to household injuries.вЂќ
If you have heart failure, you might feel like youвЂ™re taking control of your own care by trying herbal treatments that donвЂ™t require a prescription. To be safe, talk to your cardiologist first: Ask questions about CBD oil and make decisions together about using this or any other supplement, Allen says.
вЂњCBD products cost money and can distract you from taking prescribed treatments for heart failure that are evidence-based. They could do indirect harm to people with heart failure. . We already have a half-dozen treatments for heart failure symptoms and to help you live longer.вЂќ
Larry Allen, MD, MHS, University of Colorado Anschutz Medical Campus.
Scott Lundgren, DO, Nebraska Medicine.
FDA: вЂњWhat You Need to Know (And What WeвЂ™re Working to Find Out) About Products Containing Cannabis or Cannabis-derived Compounds, Including CBD,вЂќ вЂњFDA Approves First Drug Comprised of an Active Ingredient Derived from Marijuana to Treat Rare, Severe Forms of Epilepsy,вЂќ вЂњFDA and Cannabis: Research and Drug Approval Process.вЂќ
JCI Insight: вЂњA single dose of cannabidiol reduces blood pressure in healthy volunteers in a randomized crossover study.вЂќ
Oxidative Medicine and Cellular Longevity: вЂњTherapeutic Applications of Cannabinoids in Cardiomyopathy and Heart Failure.вЂќ
Cannabis and Cannabinoid Research: вЂњAn Update on Safety and Side Effects of Cannabidiol: A Review of Clinical Data and Relevant Animal Studies.вЂќ
ClinicalTrials.gov: вЂњCannabidiol in Patients With Heart Failure in AHA/ACC Stages A-C (CAPITAL-AC).вЂќ NCT03634189.
Journal of Cardiac Failure: вЂњMarijuana Use is Associated with Better Hospital Outcome in Patients with Acute Heart Failure: A Propensity Match Analysis from National Inpatient Database.вЂќ
CBD oil is made from cannabis plants but wonвЂ™t make you high. Still, this natural supplement could interact with some heart medicines. Find out what you need to know before you try CBD oil for heart failure.