CBD oil pictured with an article about diabetes research

CBD and Diabetes UK: What Does the Research Show?

Can CBD Help Diabetes?

Current human evidence does not establish CBD as a treatment for diabetes, a reliable way to lower blood sugar or a substitute for established diabetes care.

There are good scientific reasons why researchers have investigated cannabinoids and metabolic health. Laboratory and animal studies have explored inflammation, insulin sensitivity, the endocannabinoid system and other biological pathways involved in diabetes.

But promising mechanisms do not automatically become proven benefits in people.

Importantly, one of the main placebo-controlled human studies directly investigating cannabinoids in people with type 2 diabetes did not show a significant blood-glucose benefit from CBD itself compared with placebo. Read the randomized type 2 diabetes study on PubMed.

A newer randomized study published in 2025 also found that short-term CBD consumption did not improve glucose tolerance or meaningfully modify inflammation compared with placebo. Read the 2025 randomized pilot study on PubMed.

So the evidence is much more cautious than claims such as:

“CBD lowers blood sugar”
or
“CBD improves insulin resistance.”

Those claims are not currently established by human clinical evidence.

What Is Type 2 Diabetes?

Type 2 diabetes is a condition in which the body does not produce enough insulin or the insulin it produces does not work effectively.

Insulin helps the body use glucose for energy. When insulin production or response is impaired, blood glucose can become too high.

Over time, poorly controlled blood glucose can contribute to complications involving the heart, kidneys, eyes, nerves and circulation. Read NHS information about type 2 diabetes.

Type 2 diabetes is therefore a serious medical condition rather than simply a problem of consuming too much sugar.

Why Has CBD Been Studied in Diabetes Research?

Researchers became interested in cannabinoids partly because the endocannabinoid system is involved in areas including metabolism, appetite, energy balance and immune signalling.

Preclinical studies have also investigated whether CBD can influence inflammatory and oxidative pathways associated with metabolic disease.

That provides a legitimate scientific hypothesis.

But there is an important gap between saying:

“CBD affects biological systems connected with metabolism.”

and saying:

“Taking CBD improves diabetes.”

The second statement requires convincing human clinical evidence.

At present, that evidence is not there.

What Did the Human Type 2 Diabetes Trial Find?

One of the most relevant studies was a randomized, double-blind, placebo-controlled trial involving 62 people with non-insulin-treated type 2 diabetes.

Participants received one of several treatments for 13 weeks, including CBD at 100mg twice daily, THCV, combinations of CBD and THCV, or placebo.

This study is frequently discussed online, but there is an important detail.

It was THCV, not CBD, that produced a statistically significant reduction in fasting plasma glucose compared with placebo.

CBD produced changes in two other biomarkers — resistin and glucose-dependent insulinotropic peptide — compared with participants' own baseline values, but those changes were not significant compared with placebo. Read the trial on PubMed.

The study's conclusion therefore focused on the possible future role of THCV in glycaemic control, not CBD as a diabetes treatment.

This distinction matters enormously.

THCV and CBD are different cannabinoids.

Evidence involving one should not be used to advertise the other.

Does CBD Lower Blood Sugar?

There is currently not good clinical evidence demonstrating that ordinary CBD oil reliably lowers blood glucose in people with diabetes.

The direct type 2 diabetes trial did not demonstrate the significant fasting-glucose effect from CBD that was seen with THCV.

A separate randomized 2025 pilot study examined CBD in 16 sedentary adults with overweight or obesity.

Participants took 30mg CBD every 12 hours for four weeks or placebo.

CBD did not significantly improve glucose tolerance compared with placebo.

The researchers also reported that inflammation and the gut microbiome were not appreciably modified. Read the 2025 pilot study on PubMed.

The participants in this newer study did not have diabetes, and it was a small pilot study, so it cannot settle every question.

But it provides further reason not to tell consumers that CBD has been shown to improve blood-sugar control.

What About CBD and Insulin Resistance?

Insulin resistance means the body's cells do not respond properly to insulin.

It is central to the development of type 2 diabetes and is influenced by many biological and lifestyle factors.

Because CBD has been studied in metabolic and inflammatory pathways, researchers have investigated whether it might affect insulin sensitivity.

Animal and laboratory results have generated hypotheses, but the human evidence has not demonstrated that retail CBD oil is an effective treatment for insulin resistance.

The 2025 randomized pilot specifically assessed glucose tolerance and insulin sensitivity and did not find a favourable effect from CBD compared with placebo.

So the previous version of this article's statement that CBD can help cells “respond more effectively to glucose” has been removed.

CBD, Diabetes and Inflammation

Chronic low-grade inflammation has been investigated as part of the biology of insulin resistance and type 2 diabetes.

CBD has also been extensively studied for possible effects on inflammatory pathways.

But that does not mean taking CBD has been proven to reduce diabetes-related inflammation.

Recent human research into CBD and inflammatory biomarkers has produced a much more complicated picture than the common description of CBD as a straightforward anti-inflammatory.

We examine that evidence separately in our CBD and Inflammation UK: What Does the Research Show? guide.

Keeping the subjects separate is important.

Evidence that CBD affects one inflammatory marker does not establish improved blood-glucose control, reduced diabetes complications or better long-term outcomes.

What About CBD for Diabetic Neuropathy?

Peripheral neuropathy can occur in people with diabetes when nerves are damaged over time.

Symptoms can include numbness, tingling, burning sensations and pain, particularly in the feet.

CBD has been investigated in small studies of peripheral neuropathy.

For example, a 2020 randomized study involving just 29 people with symptomatic peripheral neuropathy reported improvements in several sensations after a particular topical CBD preparation compared with placebo. Read the peripheral-neuropathy study on PubMed.

That result is interesting, but it has important limitations.

It was a small study.

It investigated a specific topical preparation, not oral CBD oil.

And a study of peripheral neuropathy generally does not establish that Valley CBD oil or balm treats diabetic neuropathy.

The wider evidence is also not uniformly positive. A later randomized pilot involving topical CBD isolate for chemotherapy-induced peripheral neuropathy found no improvement compared with placebo. Read the later topical CBD trial on PubMed.

So the previous article's claim that CBD can “soothe the pins and needles sensation” associated with diabetic neuropathy goes further than the evidence supports.

Does CBD Protect Blood Vessels or the Heart in Diabetes?

The old version of this article also stated that CBD protects blood-vessel walls against damage caused by high glucose.

There are laboratory and preclinical studies investigating CBD, oxidative stress and vascular function.

That does not establish cardiovascular protection from retail CBD oil in people with diabetes.

To make that claim responsibly we would need convincing human clinical evidence demonstrating meaningful cardiovascular outcomes.

We do not currently have that evidence for ordinary CBD food supplements.

The claim has therefore been removed rather than softened.

Does Higher-Strength CBD Work Better for Diabetes?

There is no good evidence that a 40% CBD oil provides greater diabetes-related benefits than a 10% oil simply because it contains more CBD per millilitre.

Higher concentration tells you one thing:

how much CBD is contained in a given volume of oil.

It does not establish greater effectiveness for blood sugar, insulin resistance, neuropathy or another medical outcome.

The direct diabetes trial used 200mg CBD per day, but this was a clinical research dose.

It is not consumer guidance, and the study did not establish a glycaemic benefit from CBD compared with placebo.

Research doses should therefore never be converted into instructions to use a high-strength retail product.

People who simply want to understand CBD percentages can use our separate CBD Oil Strength Guide.

Is CBD Isolate Better for Diabetes?

No clinical evidence establishes CBD isolate as superior for diabetes.

CBD isolate describes the cannabinoid ingredient used in the product.

It does not demonstrate effectiveness against a particular disease.

Valley CBD oils use CBD isolate, and we can state that clearly as product information.

What we should not say is that isolate offers purer or more effective diabetes relief, nerve protection or metabolic support.

Those are separate medical claims that require evidence.

Can CBD Replace Diabetes Medication?

No.

Retail CBD should not be used to replace prescribed diabetes treatment.

Current NHS management of type 2 diabetes can involve lifestyle changes, structured education, blood-glucose monitoring and medicines where appropriate. Treatment is individualised according to the person's circumstances and health. Read NHS type 2 diabetes treatment information.

Diabetes UK also warns that supplements and complementary remedies should not substitute for diabetes medication. It says there is not enough evidence that such supplements are safe and effective for people with diabetes to recommend their use generally. Read Diabetes UK guidance on supplements.

Anyone thinking about changing diabetes medication should discuss it with their diabetes healthcare team.

CBD, Diabetes Medication and the Current FSA Advice

This is particularly important for people who arrive at this article through a diabetes search.

On 22 June 2026, the Food Standards Agency published updated consumer guidance on CBD.

The FSA currently advises healthy adults consuming CBD foods to limit total intake to 10mg CBD per day.

But that 10mg recommendation should not be interpreted as a recommendation for somebody with diabetes to take 10mg.

The FSA separately advises people taking medication and people with underlying health conditions to avoid CBD unless under medical direction. It also notes that CBD can interact with certain medicines. Read current FSA guidance.

Because diabetes is an underlying health condition and many people with diabetes take prescription medicines, that distinction is particularly relevant here.

Can I Take CBD With Metformin?

Metformin is a commonly prescribed medicine for type 2 diabetes.

We should not tell somebody taking metformin that combining it with CBD is safe.

The current FSA position is broader: people taking any medication are advised not to consume CBD unless under medical direction because interactions can occur and evidence is incomplete.

That does not mean a dangerous CBD-metformin interaction has been proven in every person.

It means a retailer should not make an individual medication-safety decision for somebody with diabetes.

A pharmacist, GP or diabetes healthcare professional is the appropriate person to advise.

What Do the NHS and Diabetes UK Recommend?

Evidence-based type 2 diabetes management focuses on controlling blood glucose and reducing the risk of complications.

The NHS recommends measures including a healthy diet, regular physical activity, weight management where appropriate, stopping smoking and prescribed medication when needed. Some eligible people can also access NHS programmes aimed at achieving type 2 diabetes remission through substantial supported weight loss.

Diabetes UK says complementary remedies and supplements should not replace diabetes treatment and does not generally recommend them because there is insufficient evidence of safety and effectiveness for people with diabetes.

CBD is not part of established NHS treatment for controlling type 2 diabetes.

What Does the FSA Say About CBD Health Claims?

The current FSA position is very clear.

CBD food products are not medicines, there are no authorised health claims for CBD foods, and claims that CBD foods relieve pain, improve sleep or treat illness are not permitted under UK regulations.

That means Valley CBD should not advertise a product as reducing diabetes-related inflammation, lowering blood glucose, improving insulin resistance, protecting against diabetic nerve damage, supporting diabetes control or treating diabetic neuropathy.

We can discuss published research.

We should not turn that research into a promise about what our products will do.

Frequently Asked Questions

Can CBD help type 2 diabetes?

Current human evidence does not establish CBD as an effective treatment for type 2 diabetes.

The most directly relevant placebo-controlled trial did not demonstrate the significant fasting-glucose benefit from CBD that was observed with THCV.

Does CBD lower blood sugar?

There is not sufficient clinical evidence to recommend CBD as a way of lowering blood glucose.

A 2025 randomized pilot also found no favourable effect on glucose tolerance compared with placebo.

Does CBD improve insulin resistance?

This has been investigated scientifically, particularly in preclinical research, but a reliable benefit has not been established in humans.

Can CBD help diabetic neuropathy?

Small studies have investigated topical CBD for peripheral neuropathy, with mixed findings.

Those studies do not establish that ordinary oral CBD isolate or a retail CBD balm treats diabetic neuropathy.

Is stronger CBD better for diabetes?

No evidence establishes a high-concentration CBD oil as more effective for diabetes.

A higher percentage indicates more CBD per millilitre, not greater medical effectiveness.

How much CBD should I take for diabetes?

There is no established retail CBD dose for treating diabetes.

The FSA's 10mg/day figure is general safety guidance for healthy adults, not a diabetes-treatment dose.

People with underlying health conditions or taking medication are currently advised by the FSA to avoid CBD unless under medical direction.

Can I take CBD while taking diabetes medicine?

This needs individual professional advice.

The FSA currently advises people taking medication not to consume CBD unless under medical direction because CBD can interact with medicines.

Can CBD replace metformin or insulin?

No.

CBD food supplements should not replace prescribed diabetes medication.

Diabetes UK advises people using complementary remedies to continue their diabetes treatment and discuss supplements with their healthcare team.

The Bottom Line

CBD and diabetes is a genuine research subject.

Laboratory and animal studies have produced interesting hypotheses involving inflammation, metabolism and cannabinoid signalling.

But the human evidence has not established retail CBD oil as a treatment for diabetes.

The most directly relevant randomized trial involving people with type 2 diabetes found that the significant fasting-glucose effect belonged to THCV rather than CBD. CBD produced some interesting biomarker changes from baseline, but not significant improvements against placebo.

A newer randomized pilot likewise did not find improved glucose tolerance from CBD.

So the evidence supports saying:

CBD continues to be researched in metabolic health.

It does not support saying:

Valley CBD oil lowers blood sugar, improves insulin resistance or treats diabetes complications.

For people living with diabetes, established medical care remains the priority, and current FSA guidance says those with underlying health conditions or taking medication should avoid CBD unless under medical direction.

This article is for general educational information only and is not medical advice. Valley CBD food supplements are not intended to diagnose, treat, cure or prevent disease.

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