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Best CBD Company Reviews: Top CBD Oil Brands & Manufacturers [2022]

Kat’s Naturals ‘Metabolize’ THC-Free Sublingual CBD Oil

Metabolize is a THC-free CBD oil formulated with complementary essential oils like ginger, lemon, grapefruit, peppermint, and cinnamon. These essential oils do more than add flavor, they’re suggested to uplift the mood, aid in digestion, and reduce bloating.

Metabolize comes in a medium potency of 16.6 mg/mL of CBD and three sizes (5 mL, 15 mL, and 30 mL). If you’re looking to use CBD to support digestive health, we highly recommend Kat’s Naturals’ Metabolize.

Price/Value 4/5

Kat’s Naturals contains high-quality organic hemp and organic essential oils with third-party lab tests to prove it. 

At $0.18 – $0.24 per mg of CBD, this product isn’t the most cost-effective on the market — however, its unique formulation and quality ingredients justify the price point. 

CBD Potency 3/5

This is a medium potency product at 500 mg of CBD per fluid ounce (16.6 mg/ mL). This is suitable for both new and experienced CBD users alike looking for a mid-range potency. It comes in a dropper bottle which makes it easier to take more or less, as needed. 

Hemp Source 4/5

Due to a lack of organic hemp certifications, we can’t give Metabolize a 5. However, this isn’t Kat’s Naturals fault — not all states are eligible for organic certification due to the limitations in the cannabis industry. 

Kat’s Naturals products are made using organic, American-farmed hemp (Southeastern states) and extracted using CO2 extraction. More importantly, up-to-date Certificates of Analysis are available to prove the quality of its hemp source.

Purpose/Uses 3/5

Kat’s Naturals tiptoes around health claims to avoid trouble with the FDA — because of this, the purpose of this product is unclear. Only a vague description is provided, claiming Metabolize will “add pep to your step.” 

Judging from the ingredient list, this formula is intended to energize, uplift the mood, and increase metabolism. Despite its name, there’s insufficient scientific evidence to back Kat’s Naturals claims that 3-4 drops of this formula will increase metabolism. 

Overall, we’re still impressed with this medium potency, mildly stimulating CBD supplement. 

Product Variations 4/5

Kat’s Naturals’ THC-Free Sublingual oils are available in four formulas and three bottle sizes — 5 mL, 15 mL, and 30 mL. We’d like to see this formula in varying CBD strengths for top marks in this category. 

Formulation/Ingredients 5/5

Hats off to Kat’s Naturals for this formula. It uses a CBD isolate infused with beneficial terpenes to compliment the therapeutic effects of CBD. The essential oils were thoughtfully considered to provide not only a pleasant flavor but invigorating sensation to the mind and body. 

Kat’s Naturals ‘Metabolize’ THC-Free Sublingual CBD Oil Review

Article By
Editorial Staff , last updated on November 16, 2021

Metabolize combines 500 mg of CBD per fluid ounce, organic hemp seed oil, and a blend of essential oils to complement CBD’s effects for an energizing and digestion-supportive health supplement. 

What makes Kat’s Naturals stand out in the CBD space is the founder’s herbalist and nutritionist background. Kat Merryfield brings her expertise in plant medicine to her CBD product formulas.

In this review, we’ll have a closer look at the Metabolize price, formula, and hemp source to help you determine if this product is right for you. 

Overview: Metabolize THC-Free Sublingual Oil

Kat’s Naturals uses a CBD isolate infused with terpenes for its THC-Free formulas. All other cannabinoids except CBD and CBDA are stripped from the extract. This guarantees the absence of THC while still maintaining the benefits of CBD and hemp’s natural terpenes. 

The Metabolize Formula Consists Of: 

  • CBD isolate (500 mg)
  • Hemp Seed Oil
  • Grapefruit Essential Oil
  • Lemon Essential Oil
  • Ginger Essential Oil
  • Peppermint Essential Oil
  • Cinnamon Essential Oil

The blend of these oils do more than add flavor, they help to stimulate the senses and support metabolism. We’ll go into more detail about each ingredient, and why its effective in this formula later on. 

Pros & Cons

Pros Cons

  • Dosing this oil is simple and straightforward
  • Therapeutic essential oils are added to further support digestion
  • THC-Free formula
  • Complete third-party lab results available online

  • Only available in one potency option
  • No full-spectrum version available

 Key Features & Benefits

1. THC-Free

Kat’s Naturals provides a Certificate of Analysis (CoA) for each product, confirming it is indeed 100% THC-free. 

While THC does lend its own set of benefits, there are times where it should be avoided, including those who have THC sensitivities or undergo regular marijuana drug testing which may pick up on some of the THC in the formula. 

With the Sublingual THC-Free Oils range, you’ll receive the benefits of CBD without any adverse effects from THC. 

2. Unique Blend of Therapeutic Essential Oils

Metabolize stands out as a CBD oil because of its unique flavor — largely owing to the essential oils added to the mix. These oils have more than just flavor benefits — they add other therapeutic effects on the digestive system and metabolic organs like the liver and pancreas. 

About the Company: Kat’s Naturals 

Kat’s Naturals was founded by herbalist and nutritionist, Kat Merryfield in 2015. 

The story begins in Merryfield’s Tennessee backyard, where she wildcrafts her herbal remedies. She started experimenting with CBD to help her husband with post-traumatic stress disorder (PTSD) after serving in the military. 

The brand is still actively involved in the veteran community. Kat’s Naturals donates a portion of sales to the Atlanta Organization Operation Rally Point to assist veterans in their transition back to civilian life by offering in-house programs and mentorship.

Who Should Consider Using Metabolize THC-Free Sublingual Oil?

Oils are a convenient and efficient way to include CBD supplements to your routine. This container has a dropper lid, making it easy to measure out an effective dose of CBD oil. 

Metabolize has a medium CBD potency at 16.66 mg of CBD per mL. It’s always recommended that you start low and add more to your dose when first experimenting with CBD — so this strength is an excellent place to start. 

You should be wary of any company claiming relief from medical conditions. CBD is an excellent support supplement, but it’s not a cure-all. 

If you take a closer look at the marketing jargon on a company’s website, you’ll find that cautious companies refrain from making any such claims. It’s always best for companies to avoid trouble with the FDA (Food and Drug Administration). 

In the vaguest marketing terms, Kat’s Naturals marketing says the product is used to “add pep to your step.” 

Kat’s Naturals is careful not to make any bold promises for this product. However, you can assume from its name, that Metabolize is intended for digestive support. It includes essential oils known to energize the body, support digestive processes, and reduce bloating.

It’s suggested to take this CBD supplement first thing in the morning. Metabolize contains stimulating essential oils, including citrus, cinnamon, and ginger, to invigorate your senses. 


Kat’s Naturals is not a budget CBD oil brand. That being said, considering the unique formula, quality of hemp, sustainable practices of the company, third-party testing, and community incentives behind Kat’s Naturals, these oils are priced fairly. 

With CBD supplementation for metabolic conditions, you can expect the oil to take a while before it starts to improve anything — so you’ll need to factor this into the cost. You may need to take the oil for a month or two consistently before you really start to feel the benefits.

If you’re looking to purchase at the Metabolize oil, the best bang for your buck is the 30 mL bottle at $0.18 per mg of CBD. This bottle size should last 60-70 days, depending on how often you use CBD oil. 

Cost Breakdown of Metabolize THC-Free Sublingual Oil

Product Image Product Name Total Price Total CBD Content Cost per mg CBD
Metabolize — 5 mL $19.99 83.3 mg $0.24
Metabolize — 15 mL $54.99 250 mg $0.22
Metabolize — 30 mL $89.99 500 mg $0.18

 CBD Potency

Metabolize is only available in one potency — 16.6 mg/ mL. A dropper full of oil offers a convenient 1 mL dose of oil (16.6 mg CBD). 

It’s an excellent place to start for beginners and experienced CBD users (you can always take more or less when needed). Because of the uplifting properties in the essential oils, it’s recommended that you take this first thing in the morning or around lunchtime. 

Potency Breakdown of Metabolize THC-Free Sublingual Oil

Product Image Product Name Total CBD Content CBD Concentration (mg/mL) Potency Level
Metabolize — 5 mL 83.3 mg 16.6 mg/mL Medium
Metabolize — 15 mL 250 mg 16.6 mg/mL Medium
Metabolize — 30 mL 500 mg 16.6 mg/mL Medium

 Hemp Source

Kat’s Naturals uses organic hemp from three multigenerational Southeastern farms. The hemp is then extracted via CO2 extraction — the cleanest extraction method without the use of harmful solvents.

Not all CBD manufacturers take care of sourcing the best crops and clean processing. 

This is where third-party testing comes in. Assuming you don’t want health supplements that contain toxins and mold, seek out companies that are transparent about where they source hemp, and what condition it arrives in. 

When researching CBD companies, look at whether or not the company provides a Certificate of Analysis (CoA) from a reputable third-party lab to verify the cannabinoid profile. Unfortunately, this isn’t a requirement in the industry, so there are many companies out there mislabelling products.

Kat’s Naturals provides the following reports for each of its products. Here are the results for the latest batch of Kat’s Naturals Metabolize THC-Free Sublingual Oil dated April 2019:


It’s not uncommon for people to experience adverse side effects to essential oils. These extracts are powerful even when diluted. 

We recommend that you pay close attention to how your body reacts to essential oils — like CBD, always start low and build your dose up over time. 

Customers enjoy the distinct citrus, minty, floral flavor, and aroma of Metabolize. Some even claim it helped curb the appetite when taken first thing in the morning. 

We give Kat’s Naturals extra points for a unique CBD oil formulation with the use of essential oils. While essential oils are widely known for its use in aromatherapy, they have plenty of medicinal benefits when ingested as a supplement as well. 

Merryfield’s background in herbalism and nutrition shines in this product. She understands that by incorporating other medicinal compounds, you can better target the ailments you’re using CBD to treat. 

Metabolize is unlike any other CBD oil we’ve come across on the market. The unique blend of essential oils boosts the effects of CBD for a more targeted focus, providing mental stimulation and may increase the metabolism (although not directly advertised on the website).

You can add these drops to your food, drinks, and it tastes good enough to directly apply beneath the tongue for faster absorption.


Let’s dive into the non-CBD ingredients in more detail. 

1. Hemp Seed Oil

CBD is fat-soluble, which means it’s often dissolved in a carrier oil to enhance its absorption rate in the body. Hemp seed oil does not contain cannabinoids. However, it’s rich in vitamins A and E (antioxidants) and Omega 3 and 6 fatty acids (excellent for heart health). 

Keep in mind that 3-4 drops — as recommended use of the product on the website — of the hemp seed oil is not a sufficient dose to reap the full benefits of hemp seed as a nutritional supplement. 

In this formula, hemp seed is used as a stable carrier oil for the CBD isolate and the essential oils. It also provides a pleasant natural, nutty flavor. 

2. Grapefruit Essential Oil 

Grapefruit essential oil is known for its effects in supporting a healthy metabolism and for uplifting one’s mood. 

Citrus essential oils are harvested from the rind of the fruit and have an energizing aromatic presence. The main components of grapefruit essential oil are the terpenes: a-pinenemyrcene, and limonene.

Oral administration of these terpenes is well tolerated and absorbed in the digestive tract. However, they should always be diluted in a carrier oil such as hemp seed oil.

3. Lemon Essential Oil 

Lemon essential oil is a natural stress reliever. Among popular essential oils, lemon might have the most stress-relieving effects. In a study conducted with mice, lemon essential oil showed the most drastic anti-stress results via serotonin and dopamine receptors (playing a significant role in perceiving happiness and mood stabilization.

By positively affecting the mood, lemon essential oil is credited to increase learning efficiency leading to more attention to detail, better memorization recall, and enhanced creativity. 

Additionally, the primary terpenes found in lemon essential oil include limonene, β-pinene, and γ-terpinene, known to aid in digestion and detoxification

4. Ginger Essential Oil 

Gingerol is the main compound found in ginger known for its potent anti-inflammatory and anti-vomiting benefits working directly on the digestive system. Gingerols also lend ginger its spicy taste and odor. 

Most are familiar with ginger’s ability to settle stomach issues, including diarrhea, bloating, morning sickness, and IBS (irritable bowel syndrome). 

Ginger essential oil is incredibly potent, so it’s only safe to ingest when it’s diluted. 

5. Peppermint Essential Oil 

Peppermint is related to many of the fragrant culinary herbs including basil, lavender, rosemary, and sage, and thyme.

Peppermint essential oil a versatile oil, and it’s non-toxic and non-irritant in low dilutions. Aside from lending a stimulating, uplifting scent, it has many healing effects such as anti-nausea, staving off mental fatigue, and relieving indigestion

6. Cinnamon Essential Oil 

Cinnamon essential oil is harvested from cinnamon bark, and it’s one of the oldest known essential oils used to soothe aching joints and numb pain due to its powerful anti-inflammatory effects. 

When it comes to metabolism, a recent study conducted by the University of Michigan found that cinnamaldehyde, the compound that gives cinnamon its distinct odor and flavor, was highly effective at triggering a calorie-burning process called thermogenesis in mice. 

Although the study was conducted on mice, researchers seem excited about cinnamon’s effects on human metabolism through thermogenesis. 

Product Options & Flavors

Metabolize is available in 5 mL, 15 mL, and 30 mL bottles all with 500 mg of CBD per fluid ounce. 

If you’re looking for something stronger, Kat’s Naturals has two high-potency CBD oils (THC-free) — peppermint flavored, Heal and the essential-oil free, terpene-free formula, Naked. 

Metabolize is the medium potency formula in this collection. If you’re looking for a milder CBD oil, Relax has 300 mg of CBD, though its essential oil blend is the opposite of the energizing effects of Metabolize. 

Kat’s Naturals Shipping & Return Policy

Kat’s Naturals has partnered with Direct CBD Online to provide shipping to the following countries: 

  • Australia
  • Canada
  • South Africa
  • United Kingdom
  • United States

Not happy with your order? 

Kat’s Naturals has a fair 30-day satisfaction guarantee. Reach out to customer service at [email protected] before mailing your product back for a full refund.

Final Verdict: We Recommend Metabolize

Metabolize has a particular intention — It’s designed to stimulate the senses and provide metabolic support. As long as you’re not looking for a CBD oil to help with your insomnia, we recommend Metabolize as a unique variation on a CBD supplement. 

We appreciate Kat’s Natural’s business and community principles as a CBD company — from sourcing quality ingredients, going the extra step for third-party testing, to the unique CBD offerings of the company. 

If you’re looking to try a flavorful CBD supplement, give Metabolize a try. 

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Kat's Naturals

4.5 / 5