CBD Dosage: How Much Should You Take?
Commissions we earn from partner links on this page do not affect our opinions or evaluations. Our editorial content is based on thorough research and guidance from the Forbes Health Advisory Board.
Table of Contents
- Determining the Best CBD Dosage for You
- How to Calculate CBD Dosage
- How to Take CBD
Cannabidiol (CBD) is growing increasingly popular, thanks to its many purported health benefits and non-intoxicating properties (most CBD products contain less than 0.3% tetrahydrocannabinol, or THC). In fact, 60% of U.S. adults have tried CBD at some point and believe it has medicinal benefits, according to a recent Forbes Health survey of 2,000 U.S. adults conducted by OnePoll. As research evolves and sheds light on CBD’s efficacy, especially for pain relief, more and more people are adding it to their daily wellness regimens.
Consumers can choose from a variety of CBD products, from oils to gummies to vapes to capsules. But figuring out the safe and effective CBD dose for an individual is a complex decision.
You May Also Be Interested In CBD Gummies From Our Featured Partner
CBD & Melatonin Sleep Tight Gummies
On Medterra’s Website
CBD Keep Calm Gummies
On Medterra’s Website
CBD Stay Alert Gummies
On Medterra’s Website
Clinical Immune Boost CBD Gummies
On Medterra’s Website
True Full Spectrum™ Deep Sleep CBD Gummies
On Medterra’s Website
True Full Spectrum™ Original CBD Gummies
On Medterra’s Website
(Note: Product details and prices are accurate as of publication and are subject to change.)
Here’s how to find the right CBD dosage for you and how to consume it safely.
Determining the Best CBD Dosage for You
With the exception of one CBD product, a prescription drug used to treat seizures associated with particular syndromes, the Food and Drug Administration (FDA) doesn’t regulate the use of CBD. (In fact, it’s illegal to market CBD as a supplement or add it to food.) Therefore, it’s best to consult a doctor with experience in CBD administration to determine your ideal dosage.
Expressed in milligrams (mg), CBD dosage largely depends on the conditions and symptoms you’re trying to treat and your unique endocannabinoid system, which is associated with motor control, behavior, emotions, the nervous system and homeostasis. CBD dosage remains an area of active research—more large, high-quality studies are needed in different populations to determine appropriate dosing, efficacy and safety guidelines.
“It’s best to start small and gradually increase your dose up to a level that gives you the desired effect,” says Cheryl Bugailiskis, M.D., a cannabis specialist at Heally, a telehealth platform for alternative medicine. Your starting point might look like half a CBD gummy or a drop of oil. Ideally, navigate this process under the guidance of a qualified physician.
If you’re still not sure where to start, mydosage.com offers a questionnaire and CBD calculator to help you based on your specific symptoms and usage goals.
How to Calculate CBD Dosage
When you consume CBD gummies, capsules or softgels, dosage is typically expressed per unit. For example, there may be 50 milligrams of CBD in each individual gummy. These products don’t offer much dosage flexibility since you can’t split up capsules easily. For instance, if one softgel capsule didn’t provide your desired result, you would have to take another full capsule, doubling the total dose.
CBD oil, on the other hand, makes it easier, to begin with a small dose. But calculating CBD oil dosage can be less straightforward. Oils and tinctures tend to come in a dropper bottle and, typically, only the total liquid volume and CBD contents are listed on the label. For example, the label might simply state there’s 1,500 milligrams of CBD in the 30-milliliter bottle.
But what does 1 milliliter look like? Due to the current lack of regulation of CBD, this calculation can be tricky. Start by figuring out the volume of a single drop in your dropper, which is usually 0.05 milliliters, according to Dr. Bugailiskis. If you’re unsure, ask the company.
Here’s where math comes in. Let’s continue with the 30-milliliter bottle with 1,500 milligrams of CBD and 0.05 milliliters in a single drop as our example.
1500mg÷30mL = 50 mg/mL
This bottle contains 50 milligrams of CBD per milliliter. Let’s see how many milligrams are in a drop:
50mg/mL ×0.05mL/drop = 2.5mg/drop
Each drop contains 2.5 milligrams of CBD.
Next, you can calculate how many drops you need to reach your goal dosage. Let’s say you want to consume 25 milligrams each day.
25mg÷2.5mg/drop = 10 drops
10 drops ×2.5mg = 0.5mL
With this CBD oil dosage calculator as your guide, you would find that you needed to consume 10 drops, or 0.5 milliliters, to reach 25 milligrams. And if you intend to consume 25 milligrams daily, you can expect this particular bottle to serve as a 60-day supply.
Some CBD products do some of this math for you and illustrate how many milligrams are in a milliliter, some even marking these points on the dropper so you know exactly what you’re taking.
CBD Dosage for Different Ailments
Without FDA approval, there is little guidance in the U.S. on how much CBD a person should consume for various conditions.
In many medical studies on CBD, you see administered doses reach hundreds of milligrams a day, which sounds severe compared to our starting dosage example of 25 milligrams. However, Steven Phan, founder of Come Back Daily, a CBD dispensary in New York, points out that patients in these studies are often dealing with serious flare-ups and pain-inducing conditions compared to everyday dispensary customers.
Below are clinically-studied CBD dosages based on different ailments and conditions. Note: Some of the formulations studied contained THC as well—not all available dosage research sticks strictly to CBD.
*Dosages are based solely on small, short-term clinical study results where CBD proved significantly successful over placebo. Much larger studies are needed to further strengthen the evidence.
FDA-approved Epidiolex administers CBD orally as a liquid to treat seizures associated with Lennox-Gastaut syndrome, Dravet syndrome and tuberous sclerosis complex. The dosage of Epidiolex is determined by taking the patient’s weight in kilograms (kg) into account.
Several countries, including Canada and those in the U.K., have approved the use of Sativex, an oral spray with equal amounts of CBD and THC, to treat pain stemming from multiple sclerosis. Canada has also approved it for treatment of cancer pain.
The medical and research community still has a long way to go before figuring out what dose works best for each condition. At an individual level, consumers can experiment with caution until they find what works best for them.
Partner Offers feature brands who paid Forbes Health to appear at the top of our list. While this may influence where their products or services appear on our site, it in no way affects our ratings, which are based on thorough research, solid methodologies and expert advice. Our partners cannot pay us to guarantee favorable reviews of their products or services
Medterra Isolate CBD Oil
How to Take CBD
Popular ways to take CBD include:
- Oils and tinctures (extracts of plant material dissolved in ethanol): A liquid that comes in a bottle with a dropper
- Gummies: A soft, chewable candy that’s often fruit-flavored
- Sprays: A liquid that comes in a bottle with a nozzle for spraying into the mouth
- Capsules: Tablets or softgels that are ingested by mouth
- Vapes: CBD oil that’s heated without ignition, resulting in an inhalable vapor
- Flower: Dried hemp plant that’s often ignited and smoked
- Edibles: Any food that CBD oil has been added to, such as brownies or chips
- Drinks: Any beverage that’s infused with CBD, often in the form of hemp extract
Your CBD product of choice will largely depend on your personal preferences, as well as your budget since prices vary depending on the potency of ingredients and manufacturing processes. Different mediums also offer varying levels of bioavailability—or how much of what you take is actually absorbed into your bloodstream to have an effect. For example, if you ingest 10 milligrams of CBD via 1 milliliter of liquid, your body might absorb about 60% of it, or about 6 milligrams.
Cannabinoids generally have a low bioavailability compared to other substances, according to Jordan Tishler, M.D., a physician specializing in cannabis treatment in Massachusetts. However, “products that contain emulsifiers like egg yolk (brownies) or lecithin (some gummies) do better,” he says.
With that said, ingesting CBD via gummies or other edibles may take longer to take effect since the CBD has to travel to your digestive system to be broken down and absorbed.
Can You Take Too Much CBD?
Like with any substance, you can take more CBD than your body can handle. Studies show doses up to 1,500 milligrams a day have been well-tolerated, but every person is different  Bergamaschi MM, Costa Queiroz RH, Zuardi AW, Crippa JAS. Safety and side effects of cannabidiol, a Cannabis sativa constituent. Current Drug Safety. 2011;6(4):237-49. . Ingesting too much CBD can cause unpleasant side effects, such as dry mouth, nausea, diarrhea, upset stomach, drowsiness, lightheadedness and general disorientation. While rare, liver damage can also occur.
What’s more, CBD can have serious interactions with certain medications. In evaluating available information on five prescription CBD-based medications, researchers found 139 medications could have a potential drug-drug interaction with CBD  Kocis PT, Vrana KE. Delta-9-Tetrahydrocannabinol and Cannabidiol Drug-Drug Interactions. Medical Cannabis and Cannabinoids. 2020;3:61–73. . People who take certain blood thinners, heart rhythm medications, thyroid medications and seizure medications need to be particularly careful.
At the end of the day, not all supplements are created equal, which is why it’s important to work alongside a health care provider when adding CBD to your wellness regimen and research reliable brands. And while emerging research and anecdotal evidence is promising, more large, randomized-controlled trials are needed to further understand the benefits of CBD and its dosing.
Here’s How to Determine How Much CBD You Should Take
Many people use CBD for pain and anxiety relief. But how do you know if you’re taking too much?
Taylor Leamey writes about all things wellness. She holds a bachelor’s degree in both Psychology and Sociology and is a certified sleep coach.
It’s safe to say that CBD is pretty mainstream now — you can buy it in grocery stores. No longer is it considered a trendy health hack but a legitimate option for pain and anxiety relief. But even with the largely widespread acceptance, there are still a lot of questions about how much and how often you should take CBD.
CBD products do not have federal oversights or regulations. In fact, up to 70% of CBD products you buy on the internet either have more or less CBD than listed on the label. Finding the ideal CBD dosage for pain or anxiety can be difficult. Here’s how to make it easy.
What can you use CBD for?
Research, though limited, indicates that CBD has legitimate health benefits. While there is no FDA regulation, research has shown that full-spectrum and broad-spectrum CBD effectively treat pain and anxiety. There’s only one FDA-approved CBD product, called Epidiolex, that’s available by prescription. Epidiolex treats seizure disorders such as Lennox-Gastaut syndrome and Dravet syndrome.
However, there are several other benefits and uses of CBD products.
The most common uses of CBD
- To lessen symptoms of anxiety and depression for things like muscle pain or migraines
- To reduce chemotherapy-induced nausea
- Relieve inflammatory diseases
- Help with behavioral symptoms of dementia or Alzheimer’s disease
- Managing multiple sclerosis and improving mobility
The CBD market is continuously expanding with new products. However, there are four main types of CBD product categories. All of which will vary in potency and dosage per unit.
Oils and tinctures
CBD oils generally come in either a liquid or capsule form. You can take the extracts independently or use the dropper to add them to food or drinks. Liquid tinctures are usually taken directly under the tongue.
“Tinctures are generally taken at higher concentrations than oils. This means that if you were taking 1 milliliter of tincture, you would need to drop the concentration down to 0.5 milliliters. A good rule of thumb is to start with a small dose (0.25 milliliters) and slowly increase your dose over time,” says Reda Elmardi, a registered dietician and certified nutritionist.
Edible CBD products are quickly becoming very popular, likely because of their convenience and flavor profiles. With edibles, you have several options in flavor, potency and prices. They have everything, from gummies to cookies, chocolates and even granola bars.
CBD is also available in topical creams and salves applied directly to the skin. Popular forms are lotions, creams or ointments. Topical CBD products are good options for muscle pains, joint inflammation or nerve pain.
Topical CBD is one of the more difficult forms for determining dosage. Not only does potency vary by product, but also varies by how much you use each application. It’s important to follow manufacturer instructions carefully.
How to determine the best CBD dosage for you
CBD products express dosage in milligrams. Epidiolex starts with a dosage of 2.5 milligrams taken twice a day. After a week, you can increase the dosage to 5 milligrams twice a day. Federal regulation makes determining dosage straightforward.
For the rest of the products on the market not regulated by the FDA, there are no established guidelines for CBD concentration, which makes determining how much you should take a little more difficult. There are a few key factors you need to keep in mind — your weight, what you’re treating and the concentration of the product.
The ideal dosage for you will vary depending on what you’re using it for and what form you’re taking. Don’t forget that different forms also mean how quickly it takes effect. Generally, edibles, oils and capsules will take roughly 30 to 60 minutes to take effect. Smoking or vaping CBD will bring it on significantly quicker since the CBD absorbs into your bloodstream rather than your digestive system.
CBD dosage will vary by condition
In general, the CBD dosage is dependent on the disease and its ability to be managed by CBD. The research that is available on CBD treatments has very varied dosage levels. Clinical studies have varied in oral doses from 100 to 800 milligrams a day. Others administer lower levels around 40 milligrams. A 2019 study investigating CBD for anxiety found that 300 to 600 milligrams reduced anxiety symptoms. However, that study was limited to 57 adult males.
“For generalized anxiety or sleep disorders, 25 to 75 milligrams per day is recommended, while for PTSD, 33 to 50 milligrams per day is recommended. In severe anxiety, a patient’s dose might be increased to 300 to 600 milligrams. If the patient is experiencing pain due to chemotherapy, 50 to 60 milligrams is recommended, with a maximum daily dose of 600 milligrams,” says Kimberly Langdon, a board-certified MD.
How much CBD is best for you will depend on your body. Your body weight and existing medications will influence the ideal dosage for you.
Can you take too much CBD?
A clinical review of studies confirmed that people tolerate doses as high as 1,500 milligrams a day. We want to stress that the research around CBD dosage is still really young, so there is not much to point to about how much is too much for people. More research is needed to definitively conclude the ideal dosage for each condition.
Not a ton of known side effects associated with CBD products. Though fatigue, diarrhea and appetite changes have been reported. The FDA states that CBD can cause liver damage and potentially impact the other prescription medications you’re taking.
If you’re starting your CBD journey, it’s best to slowly build your dosage so you can monitor how it affects you.
“The idea is to start very low (i.e., 5 milligrams per use) and increase daily usage by 5 milligrams every two days until you start feeling results. Then, stop increasing and keep using the same number of milligrams or drops. For many people, the amount that provides modest benefits in the first couple days will, after consistent use, provide more and more benefit over time,” says Dr. Dustin Sulak, an integrative physician and leading cannabis clinician.
How to calculate CBD dosage
For some forms of CBD, determining how much is each unit is simple. Capsules or gummies tend to have an expressed milligram content, making dosage much easier than oils or creams.
Oils or tinctures with a dropper bottle list the CBD content for the total liquid bottle. So instead of eating a gummy that’s 50 milligrams, it will look more like 7,500 milligrams of CBD in the 30-milliliter bottle. Some bottles will offer serving sizes — like one drop — to indicate dosage. This allows you to have greater control over how much you are intaking, but even still, it’s not a perfect science.
Some bottles with a traditional nutrition label on the back will tell you exactly how much is in one dropper. If you are unsure, it’s a good idea to reach out to the company to find out. It can be difficult to figure out how much you’re intaking for the bottles that do not break down by serving size and offer only the total amount. It is difficult, but not impossible; it just takes a little bit of math.
Say you have a 30-milliliter bottle of CBD oil, and each drop is 0.05 milliliters.
To determine how many milligrams of CBD per milliliter, you divide the total milligram content by how much the bottle is. In this example, the math would look like this:
7,500 milligrams divided by 30 milliliters = 250 milliliters.
There is 250 milligrams of CBD per milliliter for this product. Next, you want to know exactly how much CBD is in each drop.
250 milliliters x 0.05 milliliters = 12.5 milliliters per drop.
This calculation works with any bottle of CBD. Once you know how much CBD is in each drop, you can accurately take your ideal amount. “To ensure the best results, keep track of how much you take, how many times a day you take it and rate your symptoms daily (by rating 1 to 10, 10 being best) to see if they are getting better or worse,” Sulak advises.
Too long, didn’t read?
CBD is a continually evolving field in both products and research. While research is lacking, what is available suggests that CBD does have therapeutic benefits and is generally very well tolerated by people. Still, more research is needed to really dig into the long-term side effects and best dosage markers for the average person.
In place of federal regulations, use your best judgment regarding how much CBD you are taking. Talking to your doctor about dosage is always a good idea when in doubt.
The information contained in this article is for educational and informational purposes only and is not intended as health or medical advice. Always consult a physician or other qualified health provider regarding any questions you may have about a medical condition or health objectives.