What 'Nano' Really Means in Hemp Products (and What Most Brands Get Wrong)
Walk down the supplement aisle at any health-food store and you'll see "nano" stamped on bottles of everything from CBD tinctures to vitamin sprays. The word does real scientific work in pharmaceutical and food-science contexts. It also gets abused as marketing shorthand for "advanced" or "fast-acting," often by brands selling oil-in-water suspensions that don't qualify as nanoemulsions under any reasonable definition.
If you're trying to compare hemp products honestly, the difference matters. So here's what nano actually means, how to tell a real nanoemulsion from a relabeled tincture, and what to look for when you're evaluating water-soluble cannabinoids like CBG.
The literal definition: under 100 nanometers
In materials science and pharmaceutics, the prefix "nano" refers to particles smaller than 100 nanometers in diameter. A nanometer is one billionth of a meter — for scale, a human hair is roughly 80,000 to 100,000 nanometers across. When a particle drops below the 100 nm threshold, it stops behaving like a tiny solid and starts behaving more like a dissolved molecule. It diffuses faster, suspends in water more readily, and (in the case of food-grade emulsions) becomes optically transparent rather than cloudy.
This isn't a marketing distinction. It's a measurable physical property. A product that calls itself "nano" should have particles in the 10–100 nm range, verifiable by dynamic light scattering or transmission electron microscopy.
A lot of hemp products marketed as "nano" don't pass this test. Their droplets are 200, 500, or even 1,000+ nanometers — closer to a fine emulsion than a true nanoemulsion. The marketing word stuck because it sounds high-tech. The science didn't.
Why size matters for cannabinoids
CBG, CBD, and other cannabinoids are deeply lipophilic — they dissolve in fats and oils, not in water. This is a problem for two reasons.
The first is consumer experience. Cannabinoid oils float on top of water. They taste oily. They don't blend into beverages without aggressive shaking or emulsifiers. If you've ever tried to stir CBD oil into a cup of coffee and ended up with floating amber droplets, you've experienced the limit of straight oil-based delivery.
The second is bioavailability. The human gut is mostly water. When a fat-soluble compound arrives in oil form, it has to be emulsified by bile acids and broken down by pancreatic enzymes before any of it reaches the bloodstream. Studies on oil-based cannabinoid absorption suggest a meaningful percentage simply passes through unabsorbed. (Bioavailability figures vary widely depending on study design, dose, and whether the product was taken with food. We won't pretend there's one clean number — research is still maturing.)
A true nanoemulsion sidesteps both problems. By wrapping each cannabinoid molecule in a much smaller water-compatible carrier, the product mixes cleanly into water-based matrices and presents to the gut in a form that's already pre-emulsified. The cannabinoid still has to be absorbed, but the rate-limiting step of breaking down a macro-droplet has been engineered out.
How much that improves bioavailability depends entirely on the specific formulation. Anyone telling you a hemp nanoemulsion is "10x more bioavailable" with no caveats is selling you a marketing claim, not a measurement. The right answer is: it depends on the carrier system, the particle size distribution, and the matrix you're putting it into.
Three things that are often sold as "nano" but aren't
Liposomal blends
Liposomes are spherical lipid bilayers — essentially small fat vesicles that can carry water-soluble or fat-soluble cargo. They're a legitimate drug-delivery technology and they do improve absorption for certain compounds. But typical commercial liposomes are 200–800 nm in diameter — above the nano threshold. A liposomal CBG product can be a perfectly good product. It just shouldn't be sold as a nanoemulsion if the vesicle size is over 100 nm.
Microemulsions and "ultra-fine" emulsions
A microemulsion sounds smaller than a nanoemulsion, but the terminology is backwards. Microemulsions can be thermodynamically stable systems with droplet sizes typically in the 10–100 nm range — sometimes overlapping with nanoemulsions. Macroemulsions and "ultra-fine" emulsions are usually 200 nm and up. Without third-party particle-size data on the COA or spec sheet, it's hard to tell which one you're buying.
Powdered "water-soluble" CBG
Some products are sold as water-soluble CBG in powder form. What you actually receive is a CBG-loaded carrier — usually maltodextrin, gum acacia, or a similar food-grade encapsulant. When you mix the powder with water, it disperses, but the underlying cannabinoid is still trapped in a macro-particle. Some of these products do dissolve cleanly into a true micellar solution; many produce a cloudy suspension that crashes out within hours. The behavior depends entirely on which carrier system the manufacturer used. Ask for the particle-size data.
What a real nanoemulsion looks like
A few signals separate the actual nanoemulsions from the marketing nanoemulsions.
Particle size data on the COA or spec sheet. Reputable manufacturers can tell you, in nanometers, what the mean droplet diameter of their product is, and ideally provide a polydispersity index (PDI) that indicates how tight the size distribution is. If a brand can't or won't share particle-size data, treat the nano claim as unverified.
Optical clarity in water. A 1:1000 dilution of a true nanoemulsion in water should be visually clear or only faintly opalescent. If the dilution turns cloudy white or shows visible droplets, the emulsion isn't operating at the nano scale.
Documented stability over time. Real nanoemulsions are thermodynamically more stable than coarser emulsions because the surfactant geometry favors the small-droplet state. A product engineered correctly should hold its dispersion for many months. (Specific shelf-life numbers vary by formulation; we'll share ours below.)
Tolerance to processing conditions. Nanoemulsions made with the right surfactant systems can survive pasteurization temperatures and shear without breaking. Products designed for beverage applications should be tested in their target matrix and conditions.
Honest disclosure of the carrier system. Real ingredient transparency is rare in this category, but it's the strongest tell. A spec sheet that lists the exact surfactant or emulsifier used — and a manufacturer who can explain why that surfactant was chosen — is doing real product development, not marketing assembly.
How Kaw Valley Cannabis approaches nanoemulsion
For full transparency about how we think about this: our Nano Micelle CBG product is a true water-soluble emulsion built on a poloxamer micelle system. Poloxamers are pharmaceutical-grade block-copolymer surfactants that self-assemble into thermodynamically stable micelles in water. The CBG sits inside the hydrophobic core of each micelle, and the hydrophilic outer shell hydrogen-bonds with surrounding water molecules.
This is the same family of surfactants that gets used in injectable drug formulations, where particle size and stability matter more than they do in any consumer product. We use it because the chemistry actually delivers on the marketing words. Our product holds for 24 months at room temperature under accelerated stability testing. It does not separate, settle, or fall out of solution under normal storage. It survives pasteurization-range temperatures intact (relevant for beverage formulators). And it incorporates 1:1 as a water substitute in compatible matrices.
If you want our specific particle-size data, ingredient list with the named surfactant variant, or stability test results, we publish them on the product page and in the Certificate of Analysis for each batch. We're not going to claim "10x more bioavailable" because we haven't run the comparative pharmacokinetic study to justify that number. We will claim documented stability, documented mixing behavior, and documented shelf life — because we have the data for those.
How to evaluate any "nano" hemp product
When you're shopping, three questions cut through the marketing fog quickly.
First, what's the particle size in nanometers, and where is it documented? A brand that can answer this is doing real product science. A brand that can't is selling you a label.
Second, what surfactant or carrier system makes the product water-soluble, and is it disclosed on the ingredient list? Vague phrases like "proprietary delivery technology" usually mean either trade-secret protection (which is legitimate but should at least narrow the chemistry) or that the answer wouldn't survive scrutiny.
Third, what's the documented stability, and under what conditions? "Stays stable indefinitely" is not stability data — it's marketing. "24 months at room temperature with accelerated stability testing per [protocol]" is stability data.
If a product passes all three questions, the nano claim is probably honest. If it fails any one, the word is doing work it hasn't earned.
Frequently asked questions
Is nano CBG safer than regular CBG?
The cannabinoid itself is the same molecule. What changes is the delivery system — the carrier, the particle size, the dispersion behavior. Safety depends on the specific carrier ingredients (which should be food-grade or pharmaceutical-grade and disclosed on the label), not on the word "nano" itself. Ask for the full ingredient list before assuming any product is suitable for your application.
Does smaller particle size always mean better absorption?
Not always. Particle size is one factor in bioavailability, but the carrier chemistry, the matrix the product is delivered in, and the individual's metabolic state all play roles. Some published research suggests nanoemulsions can meaningfully outperform oil-based delivery for cannabinoids in specific contexts. The honest answer is: the effect depends on the product and the user, and the field is still building evidence.
Why is my "nano" CBD product cloudy in water?
Cloudiness in dilution usually indicates droplet sizes above the nano range — typically 200 nm or larger, where visible light starts scattering. A true sub-100-nm nanoemulsion at typical use dilutions should appear clear or only faintly opalescent. If your product is consistently cloudy, the marketing language and the actual particle size may not match.
Can I make a nano CBG product at home?
True nanoemulsions require specialized equipment — high-shear or ultrasonic homogenizers, sometimes microfluidization, and carefully selected surfactant systems. The DIY "shake-the-bottle" approach yields coarse emulsions that separate within minutes. If you want the benefits of nanoscale delivery, you need a product engineered with appropriate equipment and tested for particle size.
Is nano CBG legal?
CBG itself is legal in the United States under the 2018 Farm Bill when derived from hemp containing less than 0.3% delta-9 THC by dry weight. State laws vary — Kansas, for example, currently requires 0.00% THC for in-state retail sales. Federal regulations are also changing: P.L. 119-37 will impose stricter total-THC-per-container limits for hemp products starting November 12, 2026. The nanoemulsion processing itself does not change the regulatory category. Always check both federal and state law for your jurisdiction.
The short version
Nano is a real word with a specific scientific meaning. In hemp, it gets used loosely enough that the word alone tells you almost nothing about the product. The signal is in the spec sheet: particle size in nanometers, carrier chemistry by name, stability data with a protocol attached. Brands that can provide all three are doing the work. Brands that can't are decorating a tincture with a buzzword.
If you're trying to decide between cannabinoid products, that's the lens worth using — not the size of the word on the label, but the size of the droplet on the COA.
Kaw Valley Cannabis is a family-owned, vertically integrated hemp brand in Lawrence, Kansas, specializing in cannabigerol (CBG). Our Nano Micelle CBG and 99.5% Pure CBG Isolate are produced in-house from single-source Kansas hemp. Every batch ships with a full Certificate of Analysis.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Internal links: The Complete Guide to CBG · CBG vs CBD · How to Read a CBG Certificate of Analysis · The 35-Nanometer Difference
Related products: Nano Micelle CBG · Bulk Nano CBG (Wholesale)