Strongest CBD Oil UK (2026): High Strength Oils Compared

Are you looking for the strongest CBD oil in the UK? Perhaps the weaker strength wasn’t quite enough or you’re looking for a larger bottle to last you a few months? Either way, we’ve got you covered in our guide to the strongest CBD oil in the UK in 2026.

CBD oil strength can be confusing for some as each brand uses different concentrations of CBD in different sized bottles. For example a brand may advertise a 5000mg CBD but this doesn’t necessarily mean it is the strongest. True strength really depends on:

• CBD per ml (Concentration)
• CBD per drop (Dose Strength)
• Extract Form (Full Spectrum vs CBD Isolate)

Our guide compares the strongest CBD oils available in the UK right now across a myriad of metrics. So no matter if you’re looking for the strongest per bottle, or the strongest per drop, all the answers are here.

What “Strongest CBD Oil” actually means

A high number of milligrams of CBD inside a product may not be as strong as you first imagine. For example a 5000mg oil in a 100ml bottle works out at 50mg per ml whereas a 2000mg in a 10ml bottle works out at 200mg per ml. Ultimately that’s a 4x difference in real potency per drop. It is important to consider this when purchasing a high strength CBD oil.

Another important consideration is the form of CBD used. For example a high strength oil with CBD isolate may not feel as strong as a high strength oil, of the same mg, with full spectrum CBD. This is because CBD isolate contains CBD alone, whereas full spectrum CBD contains all the additional constituents of the hemp plant. This includes other cannabinoids such as CBDa, CBG, CBC, terpenes and flavonoids. All of these typically make CBD work better as they all work synergistically in a phenomenan called “the entourage effect.”

Strongest CBD Oils UK (2026)

To get a true picture of what is strongest we are going to look at multiple features. For example CBD per ml, CBD per drop, overall CBD content, the extract used and the price per 10mg. With that defined, let’s jump into our guide and see what is the strongest CBD oil in the UK.

Highest Strength CBD Oil Overall

Our highest over all in terms of CBD strength is our best selling CBD Brothers Blue Edition with 5000mg. It use a whole plant, full spectrum extract taken from hemp plants grown on their own farms, suspended in organic hemp seed oil. Moreover it comes in a whopping 100ml bottle.

• CBD per Bottle: 5000mg
• CBD per ml: 50mg
• CBD per drop: 2.5mg
• CBD Percentage: 5%
• Size: 100ml
• Extract: Full Spectrum CBD
• Price per 10mg: £0.34

This is our largest bottle of CBD oil available. It is perfect for long-term daily use for users who want a larger bottle and a high total CBD intake. It’s not the strongest CBD oil per drop that we offer but still an excellent oil overall.

Strongest CBD Oil per Drop

The oil with the strongest per drop in the UK is CBDLife Raw Hemp Extract Oil 2000mg. This oil, is also one of our best sellers and as the name suggests, is blended with a raw hemp extract. In other words it’s rich in minor cannabinoids and CBDa for a super potent entourage effect. CBDLife have opted for an MCT carrier, which is widely believed to be the best carrier oil for absorbing cannabinoids. Much smaller than the Blue Edition 100ml, this one comes in a typical 10ml bottle. Due to this it’s 4x more concentrated than the Blue Edition in terms of CBD percentage, CBD per drop and per ml.

• CBD per Bottle: 2000mg
• CBD per ml: 200mg
• CBD per drop: 10mg
• CBD Percentage: 20%
• Size: 10ml
• Extract: Full Spectrum CBD
• Price per 10mg: £0.25

CBDLife Raw Hemp Extract Oil is tremendous value and is reknowned for it’s fast and noticeable effects. Ultimately, due to its extreme concentration, this one is best for experienced users and those who are seeking lower volume dosing.

Best Extract High Strength CBD Oil

Hemptations Cold Pressed CBD Oil is a meticulously crafted, super strong, traditional cold pressed CBD oil. This has multiple advantages over other extracts as cold pressing involves minimal heat and preserves the integrity of the delicate cannabinoids, terpenes and flavonoids within the plant. This ensures you benefit from the therapeutic benefits of “the entourage effect,” just like nature intended.

• CBD per Bottle: 3000mg
• CBD per ml: 100mg
• CBD per drop: 5mg
• CBD Percentage: 10%
• Size: 30ml
• Extract: Cold Pressed CBD
• Price per 10mg: £0.32

Cold Pressed CBD Oils use a live rosin style and is perfect for those who like a traditional CBD oil with maximum plant integrity.

Best Value High Strength CBD Oil

Vitality CBD Oral Drops/Spray is our strongest CBD isolate oil with a whopping 4800mg CBD in a 30ml bottle. Administer it however you prefer with both a spray and a pipette dropper in each box. With a generous 16% CBD and 8mg per drop there is high absorption potential in this one even in small amounts. Try the spray applicator for faster absorption, more consistent dosing and easy daily use. Made with pure CBD isolate, it boasts a neutral taste and is available in lemon or berry flavour.

• CBD per Bottle: 4800mg
• CBD per ml: 160mg
• CBD per drop: 8mg
• CBD Percentage: 16%
• Size: 30ml
• Extract: CBD Isolate
• Price per 10mg: £0.10

Another great value, high strength CBD oil at just 10p per 10mg of CBD. It is perfect for users who prefer a spray applicator, oils with flavour or love convenient oils with high quality CBD that you can use on-the-go.

How to choose the Strongest CBD Oil?

First of all decide what strong means to you. Are you looking for the strongest CBD oil per drop? Or the best value strong CBD oil? Or perhaps the most natural extract CBD oil?

Choose your extract type and select full spectrum or cold pressed for the strongest overall effect and traditional experience, or a CBD isolate oil for a more palatable experience with flavour.

Finally match your experience level and choose a lower CBD per drop if you are a beginner and a more concentrated oil with a high mg per drop/ml if you are an experienced user. Remember the FSA recommends up to 70mg per day for a healthy adult. No matter what ‘the strongest’ CBD oil in the UK means to you, we have options for everyone in our store.

Final Verdict

• Strongest Overall: CBD Brothers Blue Edition 5000mg
• Strongest per Drop: CBDLife Raw Hemp Extract Oil 2000mg
• Best Extract: Hemptations 3000mg Cold Pressed CBD Oil
• Best Value: Vitality Oral Drops/Spray 4800mg

	CBD Brothers Blue Edition	CBDLife Raw Hemp Extract	Cold Pressed CBD Oil	Vitality Oral Drops/Spray
Total CBD	5000mg	2000mg	3000mg	4800mg
Bottle Size	100ml	10ml	30ml	30ml
CBD per ml	~50mg	200mg	100mg	160mg
CBD per drop	~2.5mg	~10mg	~5mg	~8mg
CBD Percentage	5%	20%	10%	16%
Price per 10mg	£0.34	£0.25	£0.32	£0.10
Extract Type	Full spectrum	Full Spectrum	Cold pressed	CBD Isolate
Best For	Size & Total CBD	Strength	Natural extract	Value

Want to know more about CBD?

If you’ve enjoyed this post you may like to read more about buying CBD. Here are some of our most popular posts on Buying CBD.

• What is the best CBD oil in the UK?
• What are the best CBD Drinks in the UK?
• Sip into Summer: CBD Drinks Review
• TRIP CBD Drink Review: Your Dry January BFF

Alternatively check out our other blog categories to learn all about – Using CBD | Learning CBD

Any questions?

We would love to help if you have any questions around this topic. Let us know by dropping us an email or comment below. We will endeavour to get back to you asap but while you wait the answer to your query may lie in our CBD FAQs.

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