Last updated: October 2026
Water-soluble CBD is CBD processed into tiny droplets, coated with emulsifiers, so it mixes into water instead of floating. In a 2020 pilot study of 10 adults, a water-soluble powder was about 4.5 times more bioavailable than a fat-based one. But studies are small, and taking CBD oil with food closes much of the gap.
Below: how it’s made, what the research shows, pros and cons, safety, and whether you need it.
How water-soluble CBD is made
CBD is an oil, so it doesn’t dissolve in water. To make it water-compatible, manufacturers break CBD oil into very small droplets (nanoemulsions or microemulsions) and coat them with emulsifiers, such as gum arabic, polysorbates or lecithin. The result can be a liquid shot, drops that disperse in drinks, or a powder. These are sometimes called “nano CBD” or self-emulsifying formulas.
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View productDoes it absorb better? The research
| Study | What it found |
|---|---|
| Pilot study, 2020 (10 adults, 30mg) | A water-soluble powder was about 4.5 times more bioavailable than a fat-soluble powder, peaking at 90 minutes |
| Self-emulsifying formula, 2019 | Higher and faster peak levels than standard CBD in MCT oil |
| Food effect, 2020 | Taking CBD oil with a high-fat meal raised levels about four times compared with an empty stomach |
The studies are small, often funded by manufacturers, and compare different products, so results vary. Most compared water-soluble CBD with CBD taken without food, which is when standard oil absorbs worst. See CBD bioavailability.
Water-soluble CBD vs CBD oil
| Water-soluble CBD | CBD oil | |
|---|---|---|
| Mixes into drinks | Yes | No; needs milk or fat |
| Onset | Often faster and more even | Slower; varies with food |
| Absorption | Higher in small studies, especially fasting | Much better with food |
| Ingredients | CBD plus emulsifiers and often preservatives | CBD plus a carrier oil |
| Price per mg | Usually higher | Usually lower |
| Stability | Some emulsions separate or degrade over time | Stable in a cool, dark place |
Is it safe?
The CBD is the same, but a faster, higher peak means you may feel effects sooner, including drowsiness, so start with a smaller dose than you’d take as oil. Long-term safety of some nano-sized ingredients hasn’t been widely studied. As with any CBD food product in the UK, it should be on the FSA’s public list and come with a batch lab report.
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. We don’t recommend our products during pregnancy or breastfeeding.
Do you need it?
- It may suit you if you want CBD in drinks, prefer a fast onset, or always take CBD on an empty stomach.
- Standard CBD oil is fine if you take it with or after a meal, as food closes much of the absorption gap, at a lower price per mg.
Our oils are standard broad spectrum CBD in MCT oil. For tips, see how to take CBD oil, CBD tea and CBD smoothies.
Related guides
- For how standard oils compare with capsules, see CBD oil vs capsules: which is better for you?
- CBD distillate, isolate and powders compared.
- For what the studies show about ordinary oil drops and capsules, see how long CBD takes to work.
- If you switched formats because CBD wasn’t working, our checklist of reasons CBD may not be working is worth a look first.
- Most CBD drinks rely on water-soluble CBD; see CBD drinks in the UK explained, including whether Trip drinks still contain CBD.
- Trip Mindful Blend vs CBD drinks.
- For an ordinary oil, taking it with a meal makes the biggest difference: see when to take CBD oil and whether to take it with food.
- If you settle on a standard oil instead, our best CBD oil UK guide shows how to work out the mg per drop and price per mg.
- For adding ordinary CBD oil to a hot drink, see our CBD coffee guide.
- Whatever the format, compare the mg of CBD you take; our guide to CBD oil strengths shows how to work it out per drop.
Sources 3
- Hobbs JM et al. Evaluation of pharmacokinetics and acute anti-inflammatory potential of two oral cannabidiol preparations in healthy adults. Phytother Res, 2020.
- Knaub K et al. A novel self-emulsifying drug delivery system improving the oral bioavailability of cannabidiol. Molecules, 2019.
- Crockett J et al. Effect of meals, whole milk and alcohol on cannabidiol exposure in healthy subjects. Epilepsia, 2020.
