CBD – The Science

Exploring the Facts, Benefits & Reducing the Stigma Around Cannabinoids

As public interest in cannabinoids continues to rise, especially CBD, it’s crucial to understand what the science really says. While cannabis has long been surrounded by stigma, increasing research is uncovering the unique roles that CBD (cannabidiol) and THC (tetrahydrocannabinol) can play in human health.

Sit tight, we have a lot to unpack. After my last post on instagram, caused ruffled a few feathers with the medical canabbis community. I wanted to take some time to further research and explore the effects of CBD and THC as a therapeutic potential, and how we can move the conversation forward with facts, not fear.

🔬 What Are CBD and THC?

THC (Tetrahydrocannabinol)

– is the primary psychoactive compound in cannabis. It binds directly to CB1 receptors in the brain, producing the “high,” and to CB2 receptors in the immune system. Medically, THC is used to manage chronic pain, nausea, and muscle spasticity in conditions like multiple sclerosis (MS) (Devane et al., 1988; Cassano et al., 2017).

CBD (Cannabidiol)

– is non-psychoactive and interacts more subtly with the body’s systems. It modulates several receptors including TRPV1 (involved in pain), 5-HT1A (linked to anxiety), and may influence CB1 receptors indirectly (Mechoulam et al., 2007; Brown et al., 2010). It’s FDA-approved for treatment-resistant epilepsy and is being studied for its impact on pain, anxiety, inflammation, sleep, and neurodegenerative diseases.

What UK Research Shows

🌿 What Is CBD?

CBD (Cannabidiol) is a non-intoxicating compound found in the cannabis plant. It won’t get you “high” like THC (Δ9-tetrahydrocannabinol) does.

It interacts with the endocannabinoid system (ECS) and other receptors (serotonin, TRPV1, adenosine) to offer potential therapeutic effects including:

  • Pain relief
  • Anti-inflammatory action
  • Anxiety reduction
  • Neuroprotection

Legal Status in the UK

SubstanceLegal StatusNotes
CBD✅ LegalMust be derived from an industrial hemp strain approved by the UK and contain <0.2% THC. Products must be registered as a novel food to be legally sold.
THC❌ ControlledA Class B drug under the Misuse of Drugs Act 1971. Prescription THC use is legal under certain conditions.
Medical Cannabis (THC)✅ Legal (since Nov 2018)Available only by specialist doctors, not GPs, for severe epilepsy, MS, chemotherapy-related nausea, etc. Access remains limited and expensive.

Approved Medical Use in the UK

MedicineComponentsApproved ForNotes
Epidyolex®CBDLennox-Gastaut & Dravet syndromesApproved by NICE (2020) via NHS
Sativex® (Nabiximols)CBD + THC (1:1 spray)MS-related spasticityPrescribed in limited cases
NabiloneSynthetic THCChemotherapy-induced nauseaUsed in hospital care

Evidence-Based Benefits

Potential UseWhat Research SuggestsReferences
EpilepsyEpidyolex reduces seizures in rare childhood epilepsiesFDA, 2024; NICE, 2020
Pain ReliefCBD affects TRPV1 (pain receptor) and may help with neuropathic and chronic inflammatory painMaccarrone et al., 2014
AnxietyEvidence supports CBD use for social anxiety and PTSD symptomsBlessing et al., 2015
SleepMixed findings; some report improved sleep, but large studies are neededWalsh et al., 2021
NeurodegenerationCBD shows promise in reducing neuroinflammation in Alzheimer’s and Parkinson’s modelsEsposito et al., 2007; Lastres-Becker et al., 2005
AddictionPreliminary studies show reduced cravings in opioid and nicotine addictionPellati et al., 2020

Safety & Side Effects

CBD is generally well-tolerated:

  • Common side effects: fatigue, diarrhea, appetite or weight changes
  • Drug interactions: can affect how other medications are metabolised via liver enzymes (CYP450)
  • No known dependency or abuse potential
  • Long-term safety still being studied

A 2024 review in Nature Cannabis confirmed CBD’s low abuse potential and minimal cognitive effects.

THC: Risks & Considerations

Recognised Medical Benefits

While THC is psychoactive, it also has well-established medical uses, particularly when used in balanced formulations with CBD (like Sativex®).

Clinical BenefitSupporting Evidence
Appetite stimulationUsed for AIDS-related anorexia (FDA, 2024)
Anti-nausea (antiemetic)Dronabinol approved for chemotherapy-induced nausea
Spasticity relief in MSSativex® (1:1 THC:CBD spray) approved in UK for MS
Pain reliefShown to reduce neuropathic pain in some studies
Sleep aidTHC may help with insomnia in some individuals
Mood elevation & muscle relaxationAnecdotally and clinically observed in small trials

THC – Considerations and Risks

Risk FactorNotes
Psychoactive effectsMay cause anxiety, euphoria, sedation, or confusion
Cognitive impactHigh doses can impair memory and attention
Psychosis riskEspecially with heavy use or genetic predisposition
Dependency potentialModerate; estimated 9% risk of dependence (Volkow et al., 2014)

Why This Matters

Many people associate cannabis only with “getting high,” which can stigmatise medical users. CBD offers non-psychoactive relief for pain, anxiety, and more — with growing clinical backing.

CBD is:

  • Affordable
  • Accessible in the UK
  • Scientifically supported for select uses
  • Still under investigation for many more potential benefits
  • CBD modulates CB1 and CB2 receptors indirectly, possibly affecting serotonin, TRPV1 (pain), and adenosine receptors.
  • It has anti-inflammatory, antioxidant, neuroprotective, and anxiolytic (anxiety-reducing) properties.

Research-Based Potential Benefits

CBD is being studied for:

  • Anxiety disorders
  • Pain relief (especially neuropathic)
  • Sleep disorders
  • Addiction treatment
  • Neurodegenerative diseases (e.g. Alzheimer’s, Parkinson’s)
  • Inflammatory diseases (e.g. MS)

But:

🔎 More rigorous studies are still needed. Most current data come from animal studies or small human trials.

Both CBD and THC Have Therapeutic Value

ComponentPsychoactive?Approved Uses (UK)Risks
CBD❌ NoEpilepsy (Epidyolex), MS (Sativex)Low risk, well-tolerated
THC✅ YesMS, Chemotherapy nausea, PainHigher psychoactive risk, some dependency potential

Reference Links

Physical activity and the endocannabinoid system: an overview – PMC

TRPV1 – Wikipedia

Frontiers | Cannabinoids and Pain: New Insights From Old Molecules

Cannabinoids and Pain: New Insights From Old Molecules – PMC

Cannabinoids and Pain: New Insights From Old Molecules – PMC

The endocannabinoid system and its therapeutic exploitation in multiple sclerosis: Clues for other neuroinflammatory diseases

Cannabidiol: Science, Marketing, and Legal Perspectives

HO drugs advis. artwork