Best CBD Oil UK (2026): what actually matters on the label
What is the best CBD oil in the UK?
The best CBD oil in the UK is the one that proves what's in the bottle. Six checks matter more than any marketing: it should contain no THC (or show trace levels on a recent lab certificate), appear on the FSA novel foods public list, state the CBD per drop or serving rather than just per bottle, publish batch certificates tested in the last 24 months, make no medical claims, and price fairly per mg of CBD. Grass & Co. CBD oils — CALM, EASE and REST — contain no THC at all, publish batch-by-batch certificates, and are stocked at Holland & Barrett. The FSA advises healthy adults to take no more than 10mg of CBD a day.
The six checks
| Check | What good looks like |
|---|---|
| THC content | None, or trace shown on a certificate. Grass & Co. oils contain no THC at all |
| FSA novel food list | The product is linked to a valid application |
| Dose per serving | Stated per drop or spray, not just per bottle |
| Lab certificates | Batch-specific, tested in the last 24 months |
| Claims | No medical claims — brands making them are breaking the rules |
| Price per mg | Divide price by total CBD mg to compare like for like |
Full spectrum vs broad spectrum vs isolate
| Type | What it means |
|---|---|
| Full spectrum | CBD plus other cannabinoids, including trace THC |
| Broad spectrum | CBD plus other cannabinoids, THC removed |
| Isolate | CBD only, nothing else |
The Grass & Co. Originals at a glance
| Oil | Strength | Botanicals |
|---|---|---|
| CALM | 500mg or 1000mg CBD | Ashwagandha, chamomile, mint |
| EASE | 500mg or 1000mg CBD | Turmeric, ginger, orange |
| REST | 500mg CBD | Lavender, hops, bergamot |
The trade-offs
Grass & Co. CBD oils
- No THC at all, confirmed per batch
- Botanical blends with a purpose
- Stocked at Holland & Barrett
- Oils only — no gummies or drinks
- Not the cheapest per mg on the market
Budget own-label oils
- Lower price per mg
- Certificates often generic rather than batch-specific
- THC content less clear
Ignore the loudest claims and check the certificate. A good UK CBD oil shows no THC (or verified trace), sits on the FSA list, states its dose per serving and prices honestly per mg. Everything else is packaging.
Our oils aren't the cheapest per mg, and we only make oils and a balm — no gummies, capsules or drinks. If you want the lowest possible price per mg of CBD, a plain isolate oil from a big retailer will beat us on cost, though rarely on transparency.
Mentioned in this piece
Questions people ask
- How much CBD should I take?
- Start low and go slow. The FSA advises healthy adults to take no more than 10mg of CBD a day — check the per-serving figure on the label, not the bottle total.
- Does CBD oil contain THC?
- Some do in trace amounts. Grass & Co. CBD oils contain no THC at all, confirmed on every published batch certificate.
- Is stronger CBD oil better?
- Not automatically. What matters is the dose per serving and staying within the FSA's 10mg daily advice. A 1000mg bottle simply lasts longer at the same dose.
- Will CBD oil show up on a drug test?
- Trace THC in some oils can build up. Our oils contain no THC, but if you're tested at work or in sport, take advice before using any CBD product.
- Where can I buy Grass & Co. CBD oil?
- CALM, EASE and REST are stocked at Holland & Barrett, in store and online.
More comparisons
- The can aisleFunctional drinks compared: Grass & Co., TRIP, Neutonic and Water Junkie
- The label questionFruiting body vs mycelium
- The format questionCapsules vs powder vs drinks
Grass & Co. products are food supplements and are not intended to diagnose, treat, cure or prevent any disease. Do not exceed the stated dose. Most products are for adults; CBD is for adults only.