Ardoa CBD Oil Review – Cerulean53

For the last two weeks, I’ve been using Ardoa Cerulean53 S-drops. One bottle was shipped in the afternoon of the 28th of January and it arrived at my door in Cambridgeshire at 10am on the 29th. 

Each bottle holds 10ml of oil with 1500mg (15%) of cannabinoids, including CBD, CBG, CBDV, CBC and THC. Ardoa states that they have “the broadest spectrum products, the most informative packing and the most detailed provenance of any company on the market.”

Despite containing up to 0.2% THC, Ardoa refers to their oil as ‘broadest spectrum’ not full-spectrum. It contains a full-plant extract harvested from Swiss hemp as well as other cannabinoids from hemp sourced in the Czech Republic. The extracts are suspended in certified organic hemp seed oil from Lithuania.

Ardoa also stocks this oil in a THC-free version. If you’re looking for a different concentration, you can opt for the Amber 42 (1000mg in 10ml), Emerald 90 (1755mg in 90ml) or Indigo 66 (1520mg in 100ml).

One 10ml bottle contains 1500mg of CBD and delivers 300 drops, each providing about 4mg of CBD. I always use 40mg of CBD per day to give a fair comparison between products. With this oil, I chose to take five drops under my tongue as soon as I got up in the morning and another five drops before I went to bed in the evening. I didn’t use the whole bottle, but it would have lasted 37 days if I did. 

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Ardoa CBD Oil in Brief

  • The oil has a strong grassy flavour with a nutty aftertaste.
  • It reduced my anxiety, reduced my tension headaches and significantly improved my sleep.
  • The bottle has a bulb-tipped dropper but no child-safe cap.
  • You can access lab results and contaminant analysis examples via the product page.
  • Lab results are available for only one batch.
  • The lab results detected twelve cannabinoids.
Cerulean53 CBD Oil Specifications
Bottle size: 10ml
Strength: 15%
Total CBD: 1500mg
CBD per drop: 4mg
Mg per ml: 150mg
Extract type: Full-spectrum (Ardoa call it broadest-spectrum)
Extraction method: Unknown
Hemp is grown in: Europe (Switzerland, The Czech Republic and Lithuania)
Organic: The hempseed carrier oil is organically certified
Third-party lab tested: Yes
Dietary: Vegan

Who is Ardoa?

Ardoa (also known as Ardoa Organics) is a CBD brand with customers in the UK and European Union. They offer a range of plant-based CBD supplements, some fully organic, others containing at least one organically certified ingredient.

On the Ardoa marketplace, you’ll find an impressive range of hemp-based products, including protein powder, topicals oils and chocolates. Their focus is environmentally friendly products and certified ingredients with documented provenance.

Because Ardoa uses ingredients from throughout Europe, they commission various labs to test them. Currently, Ananda labs create the cannabinoid profile, Eurofins screens for residual solvents and Ctaex tests for pesticides and heavy metals.

Ardoa hasn’t yet built up many customer reviews, but you can see a few on Trustpilot. So far, there are several five-star ratings and lots of mentions of the excellent oil quality and fast delivery.

Ardoa can be contacted via:

  • Phone: +44 151 558 0705
  • Email: 
  • Postal address: Ardoa UK Limited, 54 St James St, Liverpool L1 0AB

3rd Party Lab TestsArdoa Organics - Cerulean53 Lab Report

Ardoa provides an impressive array of third-party lab results, including separate certificates for cannabinoid contentsolvent residuemicrobiological contamination and pesticides/heavy metals. They can all be accessed via the Cerulean53 product page on the description and quality control & provenance tabs. 

When I accessed the Ardoa website on the 23rd and 24th Feb 2022, I could only see one example for each type of certificate. They all appeared to be completed between June and September 2020 and didn’t display a batch number that matched the number on my bottle (AO420-211110-0131). While this still gives a great insight into the contents of the bottle, it’s preferable to see the results for the latest batch or be able to access a database of results for every batch. A great example of this is the detailed database provided by Endoca

All of the certificates reporting on the various aspects of contaminant screening verified that everything was well within safe levels. The cannabinoid content certificate shows that the sample contained 12.478% CBD. When combined with the other cannabinoids, it reaches 14.968%, which is very close to the 15% cannabinoids advertised on the label. 

In the analysis, fourteen cannabinoids were tested for, five were detected in amounts greater than 0.05% (CBD, CBDV, CBG, CBC and THC). A further seven were found in measures smaller than 0.05% (THCa, CBDa, CBDVa, THCVa, CBGa, CBCa and CBN) and two were not detected (THCV and CBNA). This verifies that this oil is made with a full-spectrum extract. 

Herb Reviews Terminology:

Full-spectrum – A product that contains a complete range of cannabinoids including THC.

Broad-spectrum – A product that contains a complete range of cannabinoids except for THC. 

Isolate – A product that only contains CBD.

At Ardoa, they refer to Cerulean 53 as ‘broadest-spectrum’. We explained to them that because it contains detectable THC we would classify this as full-spectrum. Their response was:

We don’t agree with the way the terms Full Spectrum and Broad Spectrum are currently used by the majority of the industry.

A full spectrum of cannabinoids would include 100’s of cannabinoids and you have companies claiming broad spectrum with only CBD. The entire system of full/broad spectrum is being misused, there are many examples of products that contain only CBD being marketed as broad-spectrum just because they don’t contain THC, this is misleading and we try to educate our customers to understand this.

On the legal market, there should be Pure CBD, Broad Spectrum, and Broad Spectrum THC free. We produce ‘truly broad spectrum CBD products’ that contain multiple cannabinoids and some have a THC free version. The only CBD product we produce that contains only CBD is called PureCBD, made based on the requirements for professional athletes, and we don’t claim it’s either broad or full spectrum.

While we appreciate that Ardoa is attempting to demonstrate that their oil contains a broader range of detectable cannabinoids, at Herb Reviews we believe that it’s important to stick to the commonly accepted terminology. If everyone comes up with their own definitions for the same words, it becomes more challenging for customers to know exactly what they’re purchasing.

I scored Cerulean53 an 8 and not a ten because they don’t currently provide a database of the certificates for each batch. Also, the batch number on my product didn’t match the one on the lab results. Consequently, it’s not clear if the lab results on the website relate directly to the product I received.

Cerulean53 Ease of UseArdoa Organics Cerulean53 CBD Oil Colour

The blue glass bottle comes with a bulb-tipped dropper but has no child-safe cap. It’s relatively easy to use although it would be simpler with a scale on the dropper to assist with measuring out each serving. Some people may be fine without a scale, but I always struggle to count out the drops unless I’m standing in front of a mirror.

The usage instructions are simple to follow and are printed on the label, the box and on an insert inside the box. Vitality CBD is a great example of an oil with a child-safe lid and a dropper with a handy scale.


Cerulean53 has a strong flavour that’s reminiscent of grass and walnuts. There is a slightly bitter aftertaste, but it’s not too bad and It’s almost non-existent if you keep the oil under your tongue at all times. Although you can taste the hemp, this is one of the better herbal flavours and I genuinely enjoyed it.

Potency/ Effectiveness

This is a potent oil that relieved my anxiety, supported my sleep and even reduced the intensity of my tension headaches. Even after the first use, I noticed an improvement in my anxiety and a whole-body sense of relaxation.

When I took the oil in the evening, I used it about half an hour before bed. I fell asleep noticeably quicker than normal and felt well-rested in the morning. For me, this was the most impressive result of Cerulean53 because I often struggle to get enough quality sleep. Even though I use CBD regularly, few of them are able to improve my sleep, but this one definitely did.

Value for Money 

A 10ml bottle of oil containing 1500mg CBD costs £79.99. This works out at about 5p per mg of CBD, making it cheaper than Bud & Tender (7p per mg) and CannaWell (7.5p per mg). However, it’s slightly more expensive than Hemp Point (4p per mg) and the excellent CBD Brothers Blue Edition (4p per mg).

Would I Buy Again?

Yes, I would buy this oil again. The lab results are exceptionally detailed and show an impressive range of cannabinoids. I’d like to see a child-safe cap, an easy-to-read scale on the dropper and up-to-date lab results, but those are minor points compared to the wide range of potent effects that I experienced.

Currently, it just misses out on being included in our best UK CBD oils article where the bar is set very high. As Ardoa Organics has not certified the final product, it cannot be included in our best organic CBD oil reviews.

If what you seek is a high-strength oil, at 15% it is just short of the threshold of 25% to be included in our list of the strongest CBD oils available in the UK.

Ardoa – Cerulean53 CBD Oil Final Scores

Ardoa Organics Logo
Ardoa Organics - Cerulean53 Review
Ardoa Organics Cerulean53 oil is a well-made oil that’s potent enough to produce a range of helpful effects. It contains a full-spectrum extract (referred to by Ardoa as broadest-spectrum) that is suspended in a certified organic hemp seed oil. The lab results provided a detailed analysis of cannabinoids and demonstrated that the products are contaminant free.
Third-party lab results
Ease of use
Value for money
It significantly improved my sleep and reduced my anxiety.
Ardoa are very clear about where they get their ingredients and how they’re tested.
There are several different third-party labs involved in providing an exceptional array of cannabinoid and contaminant analysis.
The lab analysis detected 12 cannabinoids.
The hemp seed carrier oil is certified organic.
The flavour is hempy but pleasant.
The bottle doesn’t have a child-safe cap
Ardoa only publishes lab results for one batch of the oil.
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