Ointment vs Transdermal Patch CBD: Local Action vs Absorption into the Blood

Type “CBD ointment” and “CBD transdermal patch” into a search engine, and you will get products described almost identically. However, the difference is pharmacological, not marketing. In a crossover study from 2026, twenty healthy adults took the same preparation with hemp extract once orally and once on the skin: after oral administration, the area under the CBD concentration curve was 281 h·ng/ml, while after skin application, it was only 19, and in some participants, CBD was below the detection limit (Jain et al., Pharmaceuticals, 2026). Below you will find what this means when choosing a form, why the skin is such an effective barrier, and what to look for on the label to avoid paying for a claim that no one has verified.

KEY INFORMATION
• The same preparation resulted in 281 h·ng/ml CBD in plasma orally and 19 after skin application (Jain et al., Pharmaceuticals 2026).
• Ointments and gels work in the skin, not in the bloodstream.
• A transdermal patch is a form of medication, not a cosmetic. It is not available in the catalog at u Bucha.
• No one has measured the absolute bioavailability of CBD after skin application in humans.

Does CBD ointment enter the bloodstream?

No, in amounts that change anything. In a randomized crossover study, twenty healthy adults received the same preparation with hemp extract once orally and once on the skin, with a fifteen-day break. After skin application, CBD concentrations in plasma were low and often below the detection limit, and the metabolite 7-OH-CBD did not appear at all (Jain et al., Pharmaceuticals, 2026).

The same dose given orally resulted in an area under the curve of 281 h·ng/ml compared to 19 h·ng/ml after skin application, meaning an exposure several times higher. The peak concentration appeared 3 hours after swallowing and only after 24 hours after application to the skin. A slower and lower profile is not a defect of the preparation, but a description of what it was made for.

Moreover, the cosmetic manufacturer has no reason to want it any other way. A preparation that intentionally delivers the active substance into systemic circulation goes beyond the definition of a cosmetic and falls into the category of a medicinal product, along with the entire registration procedure. Therefore, ointments and gels with hemp are designed so that the substance remains in the skin, and reviews of dermatological formulations explicitly aim to deposit in the skin while minimizing systemic exposure (Pareek et al., Pharmaceutics, 2026).

Why does the skin block CBD so effectively?

Because that is exactly what it was created for. The stratum corneum, or the outer layer of the epidermis, consists of flat, dead corneocytes embedded in a multilayer lipid matrix. A review of the dermatological applications of cannabinoids lists poor water solubility, lipophilicity, and variable penetration through the skin as reasons why translating CBD into a proven topical therapy has still not succeeded (Pareek et al., Pharmaceutics, 2026).

The lipophilicity of CBD works ambiguously here. The affinity for lipids facilitates the molecule’s entry into the intercellular matrix of the epidermis but hinders its exit into the aqueous environment of the dermis, where capillaries are waiting. Therefore, CBD gets stuck in the layers it entered. From the perspective of a sore knee, this is an advantage because the substance stays where you applied it.

Manufacturers of transdermal systems circumvent this barrier with permeation enhancers. Terpenes and surfactants temporarily loosen the lipid matrix of the stratum corneum, and newer approaches use liposomes or microneedles. All these solutions share one thing. They require the design of a carrier, not just adding extract to a ready cream base. A hemp cosmetic off the shelf does not go through this process and has no reason to. How the transdermal system itself is constructed and how to recognize a permeation enhancer in the composition is described in the comparison of transdermal patches and regular ointments.

What is the difference between a transdermal patch and an ointment?

The purpose, not the composition. Ointments, gels, and balms are designed to keep the substance in the skin. A transdermal patch is meant to push it through the skin to achieve a concentration in the blood, so it is a form of medication with a specified daily dose. The table below compares both constructions according to parameters that are visible in practice.

A label with the word transdermal does not determine anything from this table. It is the composition of the adhesive layer and the declared daily dose that matters, not the trade name. We have noticed that in the Polish market, most products described as CBD patches are cosmetic dressings that release extract to the epidermis and end their work there. If the manufacturer does not provide a daily dose or the composition of the adhesive layer, you are dealing with a cosmetic. What is known about transdermal patches with cannabidiol from research and on whom they were conducted has been gathered in a separate FAQ about transdermal patches with CBD.

How much CBD reaches the blood from each route of administration?

The honest answer is: for most routes of administration, no one has measured this in humans. A systematic review of CBD pharmacokinetics searched 792 articles, found 24 with pharmacokinetic data in humans, and established that absolute bioavailability was reported only for smoking, where it was 31%. No such measurement has been made for any other route of administration (Millar et al., Frontiers in Pharmacology, 2018).

Therefore, numbers like “13-45% transdermal bioavailability” or “6-19% orally” circulating in Polish product descriptions have no basis in the literature. However, relative exposure can be compared, meaning how much CBD actually ended up in plasma after the same dose was given by two routes to the same individuals. This is exactly what Jain et al. measured.

Note what this chart does not say. It does not say that the ointment does not work. It says that its action does not occur through the blood, so when evaluating a cosmetic based on whether it improves sleep or relaxes the whole body, you are measuring the wrong thing.

What does CBD do in the skin if it does not enter the blood?

It works locally, on the skin’s own endocannabinoid system. The skin has a complete, brain-independent endocannabinoid system: its own receptors, endogenous ligands, and enzymes that create and break them down. It has been found in keratinocytes, sebocytes, and sensory nerve endings, and disruption of its balance is associated with acne, seborrhea, and itching (Bíró et al., Trends in Pharmacological Sciences, 2009).

The mechanism of CBD in the skin turned out to be different from what most product descriptions assume. In a study on human sebocytes and in organ culture, CBD inhibited lipogenesis and sebocyte proliferation by activating TRPV4 channels, not through CB1 or CB2 receptors. The anti-inflammatory action, in turn, occurred through the adenosine A2a receptor and inhibition of the NF-kB pathway (Oláh et al., Journal of Clinical Investigation, 2014).

We have noticed that this distinction regularly disappears from Polish texts about hemp in cosmetics, where activation of CB2 receptors appears as a ready explanation for every effect. Oláh’s work shows something opposite: the sebostatic effect of CBD occurred through a non-receptor pathway for CB1 and CB2, so explaining it with these receptors has no basis in it. Which receptor is responsible for what in the various layers of the skin has been outlined in the text about hemp cosmetics.

When is ointment sufficient, and when is systemic action needed?

This is determined by where the problem lies. If a specific area hurts, the applied preparation reaches exactly there and achieves concentrations in the tissue that are unattainable orally without burdening the entire body. In an animal model with knee inflammation, a transdermal gel with CBD reduced joint swelling, immune cell infiltration, and thickening of the synovial membrane depending on the dose (Hammell et al., European Journal of Pain, 2016).

It is worth remembering how this study was conducted. These were rats, a gel designed for transdermal penetration, doses from 0.6 to 62.3 mg per day over four days, and the concentration of CBD in plasma increased linearly from 0.6 to 6.2 mg per day. In other words: a preparation that truly penetrates also enters the blood. Translating this directly to a cosmetic applied once a day to human skin would be an abuse.

If, on the other hand, you are looking for a general effect, such as sleep, calmness, or support for ailments spread throughout the body, no topical preparation will provide that. Here, a route that actually delivers CBD to circulation is needed. An ointment applied to the neck will not replace an oil under the tongue.

What skin preparations does the store u Bucha have?

There are seven items for skin application in the catalog that fit the topic of this article: one ointment, five massage gels, and body milk. There are no transdermal patches. The patch category is listed in the store, but there are no items available for purchase. Prices below are from the store, status as of 2026-08-08.

The column with the cost per 100 ml shows why comparing shelf prices can be misleading. The tea tree ointment costs nine zlotys less than the Fortis gel, but per volume, it is over 40% more expensive. The composition must be read separately: hemp is in five of the seven items, and cannabidiol is declared in two. You can find the full selection in the cosmetics category, and the only ointment in the ointments category.

Does CBD ointment interact with medications?

When applied to the skin, the risk is low because a negligible amount of CBD enters the blood. The problem begins with systemic routes. CBD interacts with the isoenzymes CYP3A4 and CYP2C19 and with P-glycoprotein, and a review of registration data assesses the potential for interactions with commonly used medications as high (Brown and Winterstein, Journal of Clinical Medicine, 2019).

This same work states that nearly half of CBD users reported adverse effects, with a clear dose-dependent relationship, most often elevated transaminases and drowsiness. The WHO in its 2018 report assesses CBD as a well-tolerated substance with a favorable safety profile and notes that reported adverse effects may indeed result from interactions with medications taken by the patient (WHO Expert Committee on Drug Dependence, 2018).

For a preparation applied to the skin, mainly local reactions remain: redness or irritation on damaged skin, less often an allergy to essential oils. Test a new preparation on a small area of your forearm and wait a day before applying it to a larger area. If you take medications regularly, discuss switching from a cosmetic to an oral route with your doctor, not with the seller.

How to recognize a good CBD preparation for the skin?

Start by checking if the manufacturer shows the test result at all. An analysis of 84 CBD extracts purchased online found that only 30.95% were labeled according to their actual content. 26.19% of samples had less CBD than declared, 42.85% had more, and 21% contained THC, up to 6.43 mg/ml (Bonn-Miller et al., JAMA, 2017).

A caveat that usually disappears in Polish citations of this work: oils, tinctures, and vaping liquids were studied, not cosmetics. Directly transferring this result to ointments is an overinterpretation. However, it shows what the market for CBD products looks like without independent control, so as an argument for demanding a certificate of analysis, it also applies to skin preparations.

Practically: look for the concentration stated in milligrams per gram or milliliter, not just the total content on the package. A preparation with 300 mg of CBD in 200 ml gives 1.5 mg/ml, while the same 300 mg in 30 ml gives 10 mg/ml, which is over six times more in the same portion applied to the skin. Also, check whether the hemp in the composition is an extract from flowers or just seed oil, which practically contains no cannabidiol.

Frequently Asked Questions

Does CBD ointment enter the bloodstream?

No in measurable amounts. In a crossover study involving twenty adults, the same hemp preparation resulted in low CBD concentrations, often below the detection limit, with exposure of 19 h·ng/ml compared to 281 h·ng/ml after oral administration (Jain et al., Pharmaceuticals 2026).

What is the difference between a transdermal patch and a regular CBD patch?

A regular patch is a carrier for a cosmetic and acts like an ointment stuck to the skin. A transdermal patch is a form of medication: it has a layer with permeation enhancers and a specified daily dose, and its goal is to achieve a concentration of the substance in the blood. The word transdermal on the label does not determine anything.

How long does it take for CBD applied to the skin to work?

No one has measured this for local effect, and numbers like “15-45 minutes” circulating in product descriptions have no source. However, the time to peak concentration in plasma was measured: 24 hours after application to the skin compared to 3 hours after oral administration (Jain et al., Pharmaceuticals 2026).

Can hemp ointment falsify a doping test?

In a crossover study, the urine test for COOH-THC was positive in 38% of participants after oral administration of the hemp preparation and in none after skin application (Jain et al., Pharmaceuticals 2026). The risk with cosmetics is low but not zero: 21% of CBD extracts on the market contained detectable THC (Bonn-Miller et al., JAMA 2017).

Does the store u Bucha have transdermal patches with CBD?

No. As of 2026-08-08, there are no items available for purchase in the patch category. For skin application, there is an ointment, five massage gels, and hemp body milk, all in the cosmetics category. None of them is a transdermal system.

If you are looking for a preparation to rub into a specific area, browse the cosmetics category. For a systemic effect, look in the oils category, not on the skin.

This article is for informational and educational purposes. It contains internal links to product categories available in the store u Bucha. Prices and specifications may change: check the current data on the product page before purchasing.

Author: Michał Waluk · Published: 2026-08-05 · Updated: 2026-08-08