Blog - True Hemp Science

Put a few drops of CBD oil in a glass of water. It'll sit on top, bead up, and leave a greasy smear on the glass when you tip it out. Stirring does nothing. That's the whole problem in one glass, and it's why water soluble CBD got invented in the first place. I'll go through what it actually is, how it's made, and what the research says about whether it works better. Fair warning on that last part: the honest answer is messier than most brands let on, and I'd rather tell you that than sell you something. What is Water Soluble CBD? It's CBD that's been chopped into droplets small enough to spread through water and stay there instead of floating to the top. Each droplet gets a coating of food-grade emulsifier, which is what stops them merging back together. Stir it into orange juice and it vanishes in about three seconds. The drink stays clear, or goes slightly cloudy if the droplets are on the larger side. If you want to see what's out there, have a look through these water soluble CBD products. Why CBD Hates Water CBD is about as oil-loving as a molecule gets. Its logP is 6.3, and it dissolves in water at something like 0.02 to 0.06 micrograms per millilitre. That is basically nothing. Which is why every tincture you've ever bought is suspended in MCT or hemp seed oil. There was nowhere else to put it. The trouble doesn't stop when you swallow it, either. Research puts the oral bioavailability of CBD at roughly 6% on an empty stomach. Six percent. Take 50mg and about 3mg makes it into your blood. Some of that is poor absorption through the gut wall, and the rest is your liver, which clears something like 70 to 75% of whatever gets through before it reaches general circulation. Two enzymes do most of that, CYP3A4 and CYP2C19. One thing almost nobody mentions: food makes a huge difference. Taking CBD with a high-fat meal pushes bioavailability up around fourfold. So if a tincture felt strong one evening and did nothing the next morning, that's probably why. It wasn't a bad batch. Fixing CBD water solubility is mostly about that first bottleneck, the one at the gut wall. A Quick Note on the Name Oil doesn't dissolve in water. Not ever. What's really happening is dispersion, where the droplets are small enough to stay evenly spread out and never separate. So the correct word is dispersible, not soluble. The industry picked "soluble" because shoppers get it instantly and nobody wanted to explain colloid chemistry on a bottle. It's a small thing. But I've found it's a decent tell. Companies that mention it usually understand their own manufacturing. Companies that get cagey about it often don't. How It's Actually Made Four stages, and all of them involve machinery that costs more than a decent car. There are YouTube videos showing you how to do this at home with lecithin and a stick blender. Whatever comes out of that will have separated by Thursday. Choosing the extract Three options, really. CBD isolate is a white crystalline powder, about 99% pure cannabidiol, no THC, nothing else from the plant. Broad spectrum distillate keeps the minor cannabinoids and terpenes but has the THC stripped out. Full spectrum keeps the lot, trace THC included. Isolate gives you the clearest liquid and almost no taste. Full spectrum is stubborn during emulsification and adds colour to whatever you're making. None of this is specific to CBD, incidentally. Same method, different starting material, which is why you can find water soluble CBG oil online these days too. Making the two phases The extract goes into a carrier oil first, usually MCT. That's the oil phase, done. The water phase gets built separately: purified water plus emulsifiers. An emulsifier is a molecule with a water-loving end and an oil-loving end, so it can sit right on the border between the two and hold everything together. Sunflower lecithin, quillaja saponin, gum arabic, modified starch, polysorbate 80. Those are the usual ones. Ratios are everything here. How much carrier oil per unit of cannabinoid, how much emulsifier per unit of oil. Get those wrong and your product separates in three weeks instead of lasting eighteen months. Shrinking the droplets Mix the two phases and the emulsifier molecules arrange themselves into micelles, tiny spheres with a drop of oil trapped inside. They start off too big to be useful. Two ways to fix that. A high-pressure homogeniser or microfluidiser forces the mixture through very narrow channels at pressure, shaving the droplets down a bit more on every pass. Or ultrasonic cavitation, where a titanium probe vibrates fast enough to create and collapse microscopic bubbles, and those collapses rip the droplets apart. There's an actual cutoff here, not a marketing one. Below 100 nanometres average and you've got a nanoemulsion. Above that, up to about 1,000nm, it's a microemulsion. Published CBD formulations usually land near that line. One recent self-nanoemulsifying system came in at 118.9nm with a zeta potential of −21.9mV, which is fairly typical. Smaller droplets make the liquid clearer, because the particles stop scattering light. They also absorb better, which I'll come to. If you're formulating rather than buying: the R&D team at Mile High Labs has said micelles start falling apart when held above roughly 80°C for a while. That's well below the temperature that damages cannabinoids, so pasteurising or hot filling can ruin your emulsion long before it touches the CBD. Worth raising with a supplier before you order. Stabilising and drying The finished emulsion gets tested for droplet size spread, pH, and stability under heat and humidity. Proper testing follows ICH guidelines, usually 25°C at 60% humidity and 40°C at 75%, run for months rather than weeks. Then it either ships as liquid concentrate, or goes through spray drying. That last one sprays the emulsion into a heated chamber, the water flashes off, and you're left with powder. Powder is cheaper to ship and much easier to work with for capsules, sachets and drink mixes. Does It Actually Absorb Better? Short answer: yes, but not by the amounts you'll see quoted on product pages. The best human evidence is a 2025 randomised crossover trial published in the Journal of Cannabis Research. Two bioavailability-enhanced formulations tested against a standard CBD isolate capsule, all taken with food. Nine people finished every arm. Standard capsule Enhanced liquid Enhanced capsule Peak concentration 2.4 ng/mL 6.2 ng/mL 14.1 ng/mL Total exposure (AUC 0–72h) 11.7 20.2 38.0 Time to peak 6.0 h ~1.0 h 2.0 h Variation between people over 90% 27–44% 27–44% The absorption gap is real and it's large. Nearly six times the peak concentration for the enhanced capsule. But look at the bottom row, because that's the finding people skip. Variation between individuals dropped from over 90% to under half that. If you've ever taken the same dose twice and got two completely different results, that number matters more to you than the peak concentration does. Now the part that belongs in every article about this and appears in almost none of them: nine subjects is a pilot study. It's a promising signal, not proof, and nobody has replicated it. Most of the other research on nanoemulsified CBD was done in rats, showing improvements around 1.75 to 2.7 fold, and rat pharmacokinetics don't transfer cleanly to people. So, cautiously: these formats do beat plain oil in the studies we have. How much better depends enormously on the specific formulation. And any exact multiple printed on a label is a claim, not a measurement. While I'm at it, the "works in 15 minutes" line needs to die. Fastest time to peak in that trial was about an hour. That's genuinely quick compared to six hours for a standard capsule. It isn't fifteen minutes. So Which Should You Buy? Depends entirely on how you're taking it. Oil is cheaper per milligram, has two ingredients instead of five, and lets you adjust drop by drop. Something like Hypnautica CBD calming oil makes sense if you've already worked out your dose and you're happy taking it under the tongue. Water soluble earns its price where oil just won't work. Drinks, powders, anything you're blending with other ingredients. Evening formulas like Nocturna N88 sleep remedy are in that category, because keeping cannabinoids and other actives together in one stable product is hard to do with oil. The trade-off in plain terms: you'll pay more per milligram but you'll probably need fewer of them, and the results should be steadier day to day. The Bit About Safety This one matters and it gets ignored, so I'll be direct. If a format puts more CBD in your bloodstream from the same number on the label, everything that tracks with blood concentration goes up too. That includes the unwanted effects. CBD runs through CYP3A4 and CYP2C19, the same pathways a lot of prescription medicines use. The FDA has said CBD may increase or decrease how other drugs work. It's also flagged a liver injury signal that turned up during the Epidiolex review, and animal studies showing reproductive toxicity in males, including reduced testicular size and problems with sperm development. Two practical things follow from that. Don't carry your old dose across when you switch from oil. Start well below it and creep up over a week or two. And if you're on prescription medication, especially anything where the dose has to be precise, speak to your doctor or pharmacist before you start. Better absorption makes that conversation more relevant, not less. What to Look for Before You Buy Ask for a current certificate of analysis and actually read it. It should confirm potency and show clean results for heavy metals, pesticides and residual solvents. Check total THC per container, not just the percentage on the front. Look for a droplet size figure. Companies that spent money on homogenisers tend to publish the number, because it's the thing they're proud of. Vague copy about advanced nano technology with no figure attached is telling you nothing. Read the emulsifier list. Sunflower lecithin, quillaja saponin and gum arabic are the common plant-derived ones. Polysorbate 80 is food-approved and works perfectly well, though some people would rather not have a synthetic surfactant in their morning coffee. And check the spectrum against your local rules. Isolate has no THC in it. Full spectrum has trace amounts that add up across a container and can show up on a sensitive drug test.