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  • by Nicola Boulton September 02, 2023 9 min read

    Explore the potential benefits of using CBD (cannabidiol) as a complementary approach in managing Alzheimer's Disease. Learn about current research, possible mechanisms, and considerations for its use.

    Alzheimer's Disease (AD) is a progressive neurodegenerative disorder that primarily affects memory, cognition, and behavior. As the global population continues to age, the prevalence of AD is increasing, highlighting the urgent need for effective treatments. While there is no cure for AD, researchers are actively investigating various therapeutic approaches to alleviate its symptoms and slow its progression. One emerging avenue of interest is the use of CBD (cannabidiol), a non-psychoactive compound derived from the cannabis plant. In this article, we delve into the potential of CBD for Alzheimer's Disease, discussing current research findings, possible mechanisms of action, and important considerations.

    CBD and its Interaction with the Endocannabinoid System

    Jikomes, N. (2016) established that CBD interacts with the endocannabinoid system (ECS), a complex regulatory system in the body that plays a crucial role in maintaining homeostasis. The ECS consists of cannabinoid receptors, endocannabinoids produced by the body, and enzymes responsible for their synthesis and breakdown. Emerging evidence suggests that the ECS is involved in neuroprotection, inflammation regulation, and maintenance of cognitive function.

    CBD's Potential Neuroprotective and Anti-Inflammatory Effects

    One of the hallmarks of Alzheimer's Disease is the presence of neuroinflammation, which contributes to neuronal damage and cognitive decline. CBD has shown promise as an anti-inflammatory agent through its interaction with both cannabinoid and non-cannabinoid receptors. Preclinical studies using animal models of AD have demonstrated that CBD might reduce neuroinflammation and oxidative stress, two processes closely linked to the progression of the disease.

    Effect on Neurotransmitter Signaling

    CBD's potential to modulate neurotransmitter signaling is of particular interest in the context of Alzheimer's Disease. Research suggests that CBD might influence the levels of neurotransmitters like dopamine, serotonin, and glutamate. By modulating these signaling pathways, CBD could potentially have a positive impact on cognitive function and behavior in individuals with AD.

    Mitochondrial Function and Oxidative Stress

    Mitochondrial dysfunction and oxidative stress are implicated in the neurodegenerative processes seen in AD. According to Vallee et al (2022), CBD has antioxidant properties which potentially counteract oxidative damage and support mitochondrial function. While research in this area is in its early stages, these mechanisms could offer a novel approach to managing AD symptoms.

    Clinical Studies and Findings

    While preclinical studies have provided valuable insights, clinical research exploring the effects of CBD on Alzheimer's Disease is limited. Some small-scale trials and case reports have suggested potential benefits in terms of improving sleep, reducing agitation, and enhancing overall well-being in AD patients. However, larger and more rigorous clinical trials are necessary to establish the efficacy and safety of CBD as a treatment for AD.

    Considerations and Caution

    Before considering CBD as a complementary approach for Alzheimer's Disease, it's essential to be aware of several factors:

    Lack of Regulation

    The CBD market is relatively unregulated, leading to variability in product quality and dosages. It's crucial to choose reputable sources and consult with a healthcare professional.

    Interaction with Medications

    CBD has the potential to interact with other medications due to its influence on enzymes responsible for drug metabolism. It's important to discuss CBD use with a healthcare provider, especially if the individual is taking other medications.

    Individual Responses

    The effects of CBD can vary widely from person to person. What works well for one individual might not be as effective for another.

    Current Treatment Landscape

    Pharmacological Interventions

    Cholinesterase Inhibitors

    Drugs such as donepezil, rivastigmine, and galantamine are commonly prescribed for mild to moderate AD. They work by boosting levels of acetylcholine, a neurotransmitter important for memory and cognitive function. These medications can temporarily improve cognitive symptoms and daily living activities.

    NMDA Receptor Antagonists

    Memantine is an N-methyl-D-aspartate (NMDA) receptor antagonist approved for moderate to severe AD. It helps regulate glutamate, a neurotransmitter that can become toxic in excessive amounts. Memantine may slow cognitive decline and improve functional abilities.

    Emerging Therapies

    Several experimental drugs targeting beta-amyloid plaques, tau protein tangles, and neuroinflammation are being studied in clinical trials. These include monoclonal antibodies, beta-secretase inhibitors, and gamma-secretase modulators. However, many of these therapies are still in the research phase and require further investigation.

    Non-Pharmacological Strategies

    Cognitive Stimulation

    Cognitive training and stimulation programs aim to engage and challenge the brain. These interventions can include puzzles, memory exercises, and computer-based cognitive training. While they might not slow disease progression, they can enhance cognitive function and quality of life.

    Physical Exercise

    Regular physical activity has been shown to have cognitive and psychological benefits for individuals with AD. Exercise promotes blood flow to the brain, supports neuroplasticity, and may even have protective effects against cognitive decline.

    Nutrition and Dietary Interventions

    Ortega, R. M. (2006) established that a heart-healthy diet, such as the Mediterranean diet, rich in fruits, vegetables, whole grains, and healthy fats, may have a positive impact on cognitive function and reduce the risk of cognitive decline.

    Social Engagement

    Staying socially active and maintaining connections with family, friends, and community can provide emotional support, reduce feelings of isolation, and potentially slow cognitive decline.

    Occupational Therapy

    Occupational therapists help individuals with AD maintain their independence and perform daily activities. They can provide strategies and adaptive techniques to manage challenges and enhance functional abilities.

    Behavioral Interventions

    Managing behavioral symptoms such as agitation, aggression, and sleep disturbances is crucial. Behavioral interventions, such as creating a structured routine and providing a calm environment, can help manage these symptoms.

    CBD vs. THC: Understanding the Differences and Applications

    CBD (cannabidiol) and THC (tetrahydrocannabinol) are two of the most well-known compounds found in the cannabis plant. Despite their shared origin, these compounds have distinct effects on the body and are used for different purposes.

    Chemical Structure and Psychoactivity

    CBD and THC have similar chemical structures, but a critical difference lies in their psychoactivity. THC is known for its psychoactive properties, producing the "high" commonly associated with cannabis use. In contrast, CBD is non-psychoactive and does not induce the same euphoric sensations.

    Mechanisms of Action


    CBD interacts with the endocannabinoid system (ECS), a complex network of receptors and molecules that regulate various physiological processes, including mood, inflammation, and pain perception. CBD does not directly bind to the CB1 and CB2 receptors in the same way THC does. Instead, it modulates these receptors indirectly, influencing their signaling.


    According to Chayasirisobhon, S. (2020), THC primarily binds to CB1 receptors, which are abundant in the brain and central nervous system. This interaction leads to the characteristic psychotropic effects of THC. It can also activate CB2 receptors, which are more commonly found in immune cells and tissues.

    Medical and Therapeutic Applications


    Anti-Inflammatory and Analgesic

    CBD's interaction with the ECS can result in reduced inflammation and pain perception. This has led to its use in managing conditions like chronic pain and inflammatory disorders.

    Anxiety and Stress

    CBD shows potential in reducing anxiety and stress-related symptoms. It may influence serotonin receptors and promote a sense of calmness.


    Epidiolex, a CBD-based medication, is approved for treating certain forms of epilepsy, such as Lennox-Gastaut syndrome and Dravet syndrome.


    Pain Relief

    THC's analgesic properties can provide relief for various types of pain, including neuropathic pain and pain associated with certain medical conditions.

    Appetite Stimulation

    THC can stimulate appetite and is sometimes prescribed to cancer patients undergoing chemotherapy and individuals with eating disorders.

    Nausea and Vomiting

    Vincent et al (1983) established that THC has antiemetic effects, making it useful for managing chemotherapy-induced nausea and vomiting.

    CBD Delivery Methods

    As the popularity of CBD (cannabidiol) continues to rise, so does the variety of delivery methods available for consuming this compound derived from the cannabis plant. These delivery methods cater to different preferences, lifestyles, and therapeutic goals.

    Oral Ingestion

    CBD Oil/Tinctures

    CBD oil is one of the most common and versatile forms of CBD. It's taken sublingually (under the tongue) for quick absorption through the mucous membranes. It can also be added to food or beverages.

    CBD Capsules and Softgels

    Capsules and softgels provide a convenient pre-measured dose of CBD. They are tasteless and easy to swallow, making them a discreet option for on-the-go use.

    CBD Edibles

    CBD-infused edibles include gummies, chocolates, and other treats. They offer a flavorful way to consume CBD, but their effects might be delayed due to digestion.


    CBD Vaping

    Vaping involves inhaling CBD vapor through a vaporizer pen or device. Inhalation offers rapid onset of effects but may come with potential risks associated with vaping.

    CBD Flower

    Smoking CBD-rich hemp flower is another inhalation method. It delivers CBD and other beneficial compounds directly into the bloodstream but may not be suitable for everyone due to the act of smoking.

    Topical Application

    CBD Creams, Balms, and Lotions

    Topical products infused with CBD are designed to be applied directly to the skin. They are targeted for localized relief and are often used to address muscle soreness, joint discomfort, and skin conditions.

    Sublingual Application

    CBD Patches

    Transdermal CBD patches adhere to the skin and gradually release CBD into the bloodstream over time. They provide a controlled release of CBD and are discreet.

    Intranasal Application

    CBD Nasal Sprays

    Nasal sprays deliver CBD through the nasal passages, allowing for rapid absorption. This method offers quick effects and is often used for targeted relief.

    Factors to Consider


    Different delivery methods offer varying levels of bioavailability, which is the percentage of CBD that enters the bloodstream and produces an active effect. For instance, inhalation methods generally have higher bioavailability than oral methods due to the direct absorption into the bloodstream.

    Onset and Duration

    Inhalation and sublingual methods typically provide quicker onset of effects compared to oral ingestion or topical application. The effects of inhalation may peak faster but also dissipate more quickly.

    Convenience and Discretion

    Consider how easy a delivery method is to incorporate into your daily routine and how discreet it is, especially if you prefer using CBD in public settings.

    Personal Preferences and Health Considerations

    Some individuals may have preferences for certain delivery methods based on their lifestyle, taste preferences, or health conditions. For instance, those with respiratory issues might opt for non-inhalation methods.


    Different delivery methods may have varying levels of accuracy when it comes to dosing. It's important to choose a method that allows you to measure and control your CBD intake accurately


    While preliminary research into the potential benefits of CBD for Alzheimer's Disease is promising, there is still much to learn about its mechanisms of action and long-term effects. CBD's interactions with the endocannabinoid system, its potential anti-inflammatory and neuroprotective effects, and its modulation of neurotransmitter signaling present intriguing avenues for future investigation. As researchers continue to unravel the complexities of Alzheimer's Disease and the potential role of CBD, it's essential to approach CBD use cautiously, under the guidance of healthcare professionals, to ensure the best possible outcomes for those affected by this challenging condition.


    Chayasirisobhon, S. (2020). Mechanisms of Action and Pharmacokinetics of Cannabis. The Permanente Journal25, 1-3.

    Jikomes, N. (2016). What Is the Endocannabinoid System and What Is Its Role?. Top of Form

    Vallée, Alexandre, Jean-Noël Vallée, and Yves Lecarpentier. "Potential role of cannabidiol in Parkinson’s disease by targeting the WNT/β-catenin pathway, oxidative stress and inflammation." Aging (Albany NY) 13, no. 7 (2021): 10796.

    Vincent, B. J., McQuiston, D. J., Einhorn, L. H., Nagy, C. M., &Brames, M. J. (1983). Review of cannabinoids and their antiemetic effectiveness. Drugs25, 52-62.

    How does CBD help with Alzheimer's Disease?

    CBD may help with Alzheimer's Disease by reducing inflammation in the brain, protecting neurons from damage, and potentially slowing down the progression of cognitive decline.

    Is CBD legal for treating Alzheimer's Disease in the UK?

    CBD is legal in the UK as long as it contains less than 0.2% THC and is sold as a food supplement without medical claims. It can be used as a complementary therapy for Alzheimer's Disease management.

    What forms of CBD are available for Alzheimer's Disease?

    CBD for Alzheimer's Disease is available in various forms, such as oils, capsules, and edibles, offering different methods of consumption.

    How do I use CBD for Alzheimer's Disease?

    CBD for Alzheimer's Disease can be taken orally (oils, capsules, edibles) as part of a daily regimen, but it's essential to consult a healthcare provider for guidance.

    Are there any side effects of using CBD for Alzheimer's Disease?

    While CBD is generally well-tolerated, some individuals may experience side effects such as dry mouth, drowsiness, changes in appetite, or diarrhoea.

    How long does it take for CBD to work for Alzheimer's Disease symptoms?

    The effects of CBD on Alzheimer's Disease symptoms can vary among individuals and depend on factors like dosage, frequency of use, and the severity of the disease.

    Can CBD be used alongside other Alzheimer's Disease medications?

    It's crucial to consult a doctor before combining CBD with other Alzheimer's Disease medications to ensure safety and effectiveness, as well as to avoid potential interactions.

    What is the recommended dosage of CBD for Alzheimer's Disease?

    There is no standard dosage for CBD for Alzheimer's Disease due to individual variability. Starting with a low dose and gradually increasing is typically recommended.

    Is there scientific evidence supporting CBD's effectiveness for Alzheimer's Disease?

    Research into CBD's potential benefits for Alzheimer's Disease is ongoing, with some studies suggesting it may have neuroprotective properties, but more research is needed to confirm its efficacy.

    Nicola Boulton
    Nicola Boulton

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