Last updated: 12 November 2026
No CBD oil is proven to improve focus: in trials with healthy adults, CBD didn’t sharpen attention or memory. If you want CBD in a daytime routine, our pick is Evopure Flow CBD Oil, broad spectrum CBD with 35mg of ashwagandha and 35mg of maca per half pipette. One 10mg Broad Spectrum CBD Capsule is the plain option.
This guide is for adults who are choosing a daytime CBD product. It compares Flow and our capsules with other UK daytime oils, sets out what the research on CBD, ashwagandha and maca really shows, and lists who should check with a GP or pharmacist first. We make Flow, so judge it against the checklist like any other brand.
Our pick for a daytime routine
Flow CBD Oil is broad spectrum CBD with 35mg of ashwagandha root extract and 35mg of maca root extract per half pipette, in coconut MCT oil with a citrus terpene blend. 10mg of CBD is about 0.2ml of the 500mg oil. Not for anyone with a thyroid, liver or autoimmune condition. Prefer just CBD? Broad Spectrum CBD Capsules give one 10mg capsule a day, rated 4.66 out of 5 from 125 ratings (checked 12 November 2026).
Add Flow CBD Oil 500mg to bag Add 10mg capsules to bag or choose another strength
The FSA’s 10mg a day figure is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication.
Broad spectrum with 0% THC, every CBD batch third-party lab tested, on the FSA public list and made in the UK. Adults only. We don’t recommend our products during pregnancy or breastfeeding. Subscribe and save 25% on your first order, then 20%. New to Evopure? Join our emails for 20% off a one-off first order. Free UK delivery over £40.
Is there a best CBD oil for focus?
There’s no CBD oil proven to improve focus, and no CBD food supplement can legally claim to. The best you can do is choose a daytime product you can take at a steady 10mg: broad spectrum with 0% THC, a clear amount in ml or per capsule, a batch lab report and a place on the FSA public list.
THC matters here. It’s the compound in cannabis that causes a high, and in research it is THC, not CBD, that gets in the way of attention and memory. That’s one reason to choose broad spectrum or isolate products with 0% THC on the lab report. For the full study-by-study picture, read does CBD help focus and studying?
Most people who look for a “focus” CBD oil want something for the working day rather than the evening. Our two daytime options:
| Choose it if you want | Our pick | 10mg of CBD is | Good to know |
|---|---|---|---|
| CBD with botanicals for the daytime | Flow CBD Oil 500mg | About 0.2ml | 35mg ashwagandha and 35mg maca per half pipette; honey and lemon taste. Ashwagandha cautions apply |
| Just CBD, nothing to measure | Broad Spectrum CBD Capsules 10mg | One capsule | Tasteless vegan capsule, easy to take at a desk |
Our evening oil, Sleep CBD Oil, contains passion flower and a myrcene-led terpene blend, so we don’t suggest it for the working day. Our 25mg capsule is above the FSA’s 10mg advice.
Daytime CBD oils in the UK compared
Here’s how Flow and our capsules compare with two other UK daytime oils, using facts from each brand’s own website and the FSA public list. We make Evopure, so we don’t score the others.
| Product (pack) | What’s in it besides CBD | 10mg of CBD is | THC, lab reports and FSA list |
|---|---|---|---|
| Evopure Flow CBD Oil 500mg (10ml) | Ashwagandha and maca root extracts (35mg each per half pipette), citrus terpene blend, MCT oil | About 0.2ml | Broad spectrum, 0% THC; batch reports on request; listed, validated (RP438) |
| Evopure Broad Spectrum CBD Capsules 10mg (30) | Inulin, vegan HPMC capsule | One capsule | Broad spectrum, 0% THC; batch reports on request; listed, validated (RP438) |
| Grass and Co CALM 500mg (10ml) | Described by the brand as CBD with ashwagandha, chamomile and mint | About 0.2ml (500mg in 10ml) | Made “to meet UK legal limits for controlled cannabinoids”; lab certificates on its site; listed, validated (RP324) |
| Cannaray Bright Days Oil Drops 500mg (10ml) | Coconut MCT oil and orange flavouring | About 0.2ml (the brand says 1ml is about 50mg) | Described as THC-free; lab reports page; listed, validated (RP350 and RP450) |
Checked 12 November 2026 on each brand’s own website and the FSA public list. Evopure isn’t connected with the other brands. No CBD food supplement can claim to improve focus or treat any condition.
Grass and Co’s oils are sold through Holland and Barrett, and its CALM oil also comes in 1,000mg. Cannaray’s Bright Days oil also comes in 30ml bottles at 1,500mg and 3,000mg. Of the four, Flow and CALM are the two that pair CBD with ashwagandha. For more brands, see our broad spectrum CBD oil guide and the best CBD capsules in the UK.
What does the research on CBD and focus show?
Trials in healthy adults have not found that CBD improves focus. In a 2025 trial, 246mg of CBD made no difference to learning or memory compared with placebo. In a 2023 trial with college students, 300mg left most test scores unchanged. The reassuring side is that CBD didn’t impair thinking either, even at high doses.
- Doses were far higher than a supplement. These studies used 15mg to 1,500mg in a single dose, often 300mg or more, compared with 10mg a day from a food supplement.
- Driving and reaction time. A 2022 dose-ranging trial found 15mg, 300mg and 1,500mg of CBD didn’t impair simulated driving or thinking skills, or make people feel intoxicated.
- Drowsiness is possible. Sleepiness is a known side effect of CBD for some people, so don’t try it for the first time before an exam, an interview or a long drive. See CBD before an interview or exam.
If your concentration has dipped, the usual causes come first: short sleep, stress, low iron or B12, too much caffeine late in the day, or long stretches without a break. Our guides to brain fog, how to focus better and the best supplements for focus cover what has better evidence. If concentration problems are new, persistent or affecting work, see your GP.
Ashwagandha and maca in Flow: what the trials used
Ashwagandha has more research on thinking skills than CBD, but the trials used much larger amounts than Flow contains. A 2026 review of 20 trials with 1,249 adults found small to moderate improvements in memory and in attention and processing speed. Most trials were small and short, and they typically used several hundred milligrams of root extract a day.
For example, a 2017 pilot study gave 50 adults with mild memory problems 300mg of ashwagandha root extract twice a day for eight weeks. Flow contains 35mg of ashwagandha per half pipette, a fraction of that, so we make no claim that Flow improves focus or memory. Ashwagandha has no authorised health claims in the UK. See how much ashwagandha per day for trial doses.
Maca is a Peruvian root traditionally taken for everyday vitality. There is very little human research on maca and attention, so treat it as part of Flow’s taste and tradition rather than a focus ingredient. Our maca root guide covers what has been studied.
Ashwagandha safety: who should avoid it
The FSA and its Committee on Toxicity are reviewing ashwagandha’s safety, and no outcome had been published when we checked in November 2026. Rare cases of liver injury have been reported. Don’t take Flow if you:
- have a thyroid condition or take thyroid medicine, because ashwagandha may raise thyroid hormone levels (see ashwagandha and thyroid medication)
- have a liver condition or an autoimmune condition
- are pregnant, trying to conceive or breastfeeding
- take sedatives, immunosuppressants, or diabetes or blood pressure medicines, unless your GP or pharmacist agrees
If that’s you, our Broad Spectrum CBD Capsules contain no ashwagandha. Read more in ashwagandha side effects and CBD and ashwagandha together.
When to take a daytime CBD oil
Take it with breakfast or lunch, at the same time each day. Swallowed CBD is absorbed better with food that contains some fat. Give it 2 to 4 weeks at a steady amount before deciding whether it suits you.
- Measure 10mg in ml. On the 500mg Flow or Broad Spectrum oil, 10mg of CBD is about 0.2ml, just over a quarter of a pipette.
- Hold it under your tongue for about a minute, then swallow.
- Coffee is fine for most people. There’s no known harmful interaction between CBD and caffeine at normal amounts. See CBD coffee and how long caffeine lasts.
- Notice how you feel. If CBD makes you drowsy, take it later in the day or not at all, and don’t drive until you know how it affects you.
Our guides to CBD in the morning or at night and how much CBD to take go into more detail.
Who should check first or avoid it
- Under 18s. Many people searching for focus help are revising for exams. The FSA doesn’t recommend CBD for anyone under 18, and our products are for adults only.
- Anyone taking medicines. As a precaution, the FSA advises people taking any medication not to take CBD unless under medical direction. Ask your GP or pharmacist first. See can CBD interact with medication?
- ADHD medicines. Ask your ADHD specialist or pharmacist before adding CBD. CBD isn’t a treatment for ADHD: see CBD and ADHD.
- Pregnancy and breastfeeding. The FSA advises against CBD, and we don’t recommend our products during pregnancy or breastfeeding.
- Drug tests at work or in sport. Broad spectrum products with 0% THC carry a low risk, but no CBD product can rule it out. See CBD and drug tests.
How to choose a daytime CBD oil: a checklist
| Check | What good looks like |
|---|---|
| THC | Broad spectrum or isolate, with 0% THC (or “not detected”) on a recent lab report |
| Amount | The mg of CBD per ml, or per capsule, so you can work out 10mg |
| Botanicals | The amount of each added herb per serving, and clear warnings for ashwagandha |
| FSA public list | On the FSA’s list of CBD products linked to a novel food application, never “FSA approved” |
| Honest wording | No promises of sharper focus, better memory or ADHD help. CBD food supplements can’t make those claims |
Our step-by-step guide shows how to read a CBD lab report, and CBD strength explained shows how to turn mg and % into ml.
Next step
if you’d like CBD as part of your working day, Flow CBD Oil is our daytime oil with ashwagandha and maca (10mg of CBD is about 0.2ml of the 500mg oil; not for thyroid, liver or autoimmune conditions). Or keep it simple with one 10mg Broad Spectrum CBD Capsule a day.
Add Flow CBD Oil 500mg to bag Add 10mg capsules to bag
Subscribe and save 25% on your first order, then 20%. New to Evopure? Join our emails for 20% off a one-off first order. Free UK delivery over £40. Adults only. If you take any regular medicines, check with your GP or pharmacist first. We don’t recommend our products during pregnancy or breastfeeding.
Sources 9
- Food Standards Agency. Cannabidiol (CBD) guidance.
- Food Standards Agency. CBD products linked to novel food applications (public list, checked 12 November 2026).
- Gebregzi HH et al (2025). Oral cannabidiol did not impair learning and memory in healthy adults. Journal of Cannabis Research.
- Rudisill TM et al (2023). The effects of cannabidiol on subjective states, cognition, and psychomotor function in healthy adults: a randomized clinical trial. Fundamental and Clinical Pharmacology.
- McCartney D et al (2022). Effects of cannabidiol on simulated driving and cognitive performance: a dose-ranging randomised controlled trial. Journal of Psychopharmacology.
- Zhu X et al (2026). Effects of Withania somnifera (ashwagandha) on cognitive and physical function in adults: a systematic review and meta-analysis. Frontiers in Pharmacology.
- Choudhary D et al (2017). Efficacy and safety of ashwagandha root extract in improving memory and cognitive functions. Journal of Dietary Supplements.
- Björnsson HK et al (2020). Ashwagandha-induced liver injury: a case series from Iceland and the US Drug-Induced Liver Injury Network. Liver International.
- Food Standards Agency. Summary of responses to the call for evidence on ashwagandha.
This guide is general information, not medical advice. Evopure makes Flow CBD Oil and Broad Spectrum CBD Capsules. Our CBD products are on the FSA’s public list, linked to validated novel food applications.
