Earth Harmony Methylene Blue Review: What the Label, COA and Our Database Show

Earth Harmony is a legitimate US brand. It is a real company with a listed address, posted policies and an official Amazon store, and it states clear amounts: 12 mg per capsule, or 1% (about 0.5 mg per drop) for the liquid. Its published COA for one liquid batch reports 12.2 mg per serving by HPLC, with heavy metals and microbials passing. In our lab and water test database both products are rated Acceptable, based on the company's credibility. We have not tested either product ourselves yet.

• Strong points: real company, US seller, clear amounts, a batch-numbered COA with a measured potency.
• Open questions: the COA does not name an outside lab, heavy metals are shown as Pass rather than numbers, and no capsule COA is posted.
• Read the formula: the liquid adds nano gold and ORMUS minerals, and the capsules add berberine, which has its own medication interactions.

Important: The FDA label for methylene blue injection (ProvayBlue) warns about serotonin syndrome with serotonergic medications, including SSRIs and MAOIs. Review the full adverse medications list before use.

Earth Harmony is a real, identifiable company, which already puts it ahead of a large share of the methylene blue sold online. The products are sold by Earth Harmony Naturals LLC, and the company website lists a business address in Houston, Texas, posted return, shipping and privacy policies, and a phone number. The brand sells through its own site and through an official Earth Harmony Naturals store on Amazon, and the seller is based in the United States.

That matters more than it sounds. In our lab and water test database, a missing company, an overseas seller, or a listing that changes brand names every few months are some of the most common reasons a product ends up rated Avoid. Earth Harmony has none of those problems.

One small thing a careful buyer might notice: the company's certificate of analysis lists a Wilmington, Delaware mailing address, while the website footer lists Houston. A registered mailing address in another state is common for small companies and is not a red flag on its own. We mention it only because it is the kind of detail worth knowing when you compare paperwork.

Earth Harmony sells methylene blue in two forms, both under the name Ultimate Methylene Blue. Here is what each product page states, as of October 2026.

Both labels state a clear amount, which is the first thing we look for. The capsule works out to 12 mg each, and the liquid to about half a milligram per drop. Earth Harmony's own FAQ says the methylene blue powder is not made in the US: the company buys pharmaceutical-grade material and does the formulation, bottling and testing here. That is normal for the category and they say it plainly, which we count in their favor.

Earth Harmony posts a certificate of analysis (COA) image on the liquid product page. We read it line by line. Here is what it reports.

That is a reasonable COA. It names a test method for every line, it ties results to a batch number, and the potency result is a measured number rather than a checkmark. A measured 12.2 mg against a 10 mg spec is a healthy result.

Three things it does not show, and these are the questions we would ask any brand, including our own:

• Which lab ran it. The sheet is on Earth Harmony letterhead and does not name an outside laboratory or its accreditation. Earth Harmony says it does both in-house and third-party testing, but this document alone does not tell you which one you are looking at.
• Measured heavy metal values. Each metal is reported as Pass rather than as a number, so you can see that it met the limit but not by how much.
• A capsule COA. The capsule page does not show one. The company says it provides COAs and that you can request a copy from support@earthharmony.com.

None of that means the product is bad. It means the paperwork leaves a few questions open, and those are easy to ask.

We keep a public database of 166 methylene blue products with water test and lab test results where we have them. Both Earth Harmony products are listed there, and both carry the same verdict: Acceptable.

In our database, Acceptable has a specific meaning. It is used for a competitor product that either passed our own lab test, or comes from a genuinely trustworthy, established company even though that specific product has not been tested yet. Earth Harmony is in the second group. We have not water-tested or lab-tested either Earth Harmony product ourselves, so we have not independently confirmed the 12 mg or 1% on the label. The Acceptable rating rests on the company: a real business, a US seller, posted policies, and no listing problems we have flagged.

For context, most products in the database do not get this far. Of the 166 listed, only 5 competitor products are rated Acceptable, and Earth Harmony accounts for two of them. If we test Earth Harmony in the future, the result will go in the database whichever way it comes out.

This is where the two Earth Harmony products differ most from a plain methylene blue supplement, and where we think a buyer should slow down and read.

The liquid. Earth Harmony describes nano liquid gold as amplifying methylene blue's photodynamic activity. The published work on gold nanoparticles and methylene blue that we could find is laboratory research on photodynamic therapy, where the dye is activated with light to kill microbes, for example in studies on Candida biofilms and on bacteria. We did not find human studies showing that adding gold to an oral methylene blue drink changes what it does in the body. ORMUS and structured water do not have a standard scientific definition, so there is no lab measurement that can confirm or rule them out.

The capsules. The capsule adds vitamin C, chlorophyllin, chlorophyll and organic berberine. Vitamin C is a common pairing with methylene blue. Berberine is the one to know about: it is an active plant compound, not a filler. In a human study, repeated berberine dosing reduced the activity of several liver enzymes (CYP2D6, CYP2C9 and CYP3A4) that break down many prescription drugs. Methylene blue already comes with serious medication warnings, so a product that pairs it with a second compound that has its own interaction profile is worth showing to your pharmacist or doctor if you take any medication. The capsule page does not list how much berberine each capsule contains.

If you only want methylene blue and nothing else, both Earth Harmony products include more than that. Whether the extras are a plus or a minus depends on you, and on what your healthcare provider says.

Earth Harmony is one of the easier brands to vet, because there is a real company on the other end of the email. If you are considering it, these are the questions worth sending to support before your first order:

• Can I see the COA for the lot I will receive? The lot number on your bottle should match the report.
• Which lab ran it, and is that lab accredited? Look for ISO/IEC 17025 accreditation for a third-party lab.
• Can I see measured heavy metal values? Numbers tell you more than Pass.
• For the capsules, how much berberine is in each one? You and your doctor need that number to judge interactions.

A good brand answers these quickly. We would expect the same questions about our own products, and we post our reports on our lab tests page so you do not have to ask.

We make methylene blue, so read this section knowing that. The fairest comparison we can offer is the same checklist applied to both.

On the checks that separate trustworthy sellers from risky ones, Earth Harmony does well. The open items are documentation details and a formula choice, not warning signs.

Do not take methylene blue if you are currently using:

• SSRIs or MAOIs (the FDA label warns of serotonin syndrome)
• Any other serotonergic medication
• If you are pregnant, nursing, or have G6PD deficiency, speak with your healthcare provider first

Review the full adverse medications list and consult your healthcare provider before starting methylene blue in any form.

Every Nutricel formula uses the same methylene blue. Third-party lab reports are on our lab tests page. Whether methylene blue fits you at all is a question for your healthcare provider.

If you and your provider decide it does, this is how our products differ:

Blue Boost is our core formula: 12mg of methylene blue per capsule.

Blue Immune combines methylene blue with copper, NAC, grass-fed beef liver, and vitamins A, C, and E.

Blue Shroom pairs methylene blue with six organic mushroom extracts including lion's mane, reishi, cordyceps, chaga, shiitake, and turkey tail.

Blue Renew is built around GlyNAC (glycine and N-acetyl cysteine) alongside methylene blue.

Blue Remove combines zeolite, curcumin, and nattokinase with methylene blue.

Blue Liquid delivers USP-grade methylene blue in a dropper bottle for liquid format.

Earth Harmony is a legitimate, established US brand that states its amounts clearly and publishes a COA with a measured potency result. In a category full of anonymous sellers, that puts it in the small group of competitor products we are comfortable listing as Acceptable.

The open questions are specific: which lab ran the published COA, what the measured heavy metal values are, where the capsule COA is, and whether you want the added gold, ORMUS or berberine at all. We have not tested Earth Harmony ourselves yet. Ask the brand for batch-matched paperwork, and talk to your healthcare provider before starting any methylene blue product, theirs or ours.

Brand Sources

Research

Regulation and Safety

Further Reading

Sam Carlson, Marketing Developer at Nutricel

Sam is a marketing developer at Nutricel who writes the Nutricel Insights series to help our customers understand methylene blue and make informed choices, translating the published research into plain language. Sam is not a medical professional, and these articles are intended as education rather than medical advice. Every figure in this piece is tied to the studies listed in the references, and you should always speak with your healthcare provider before starting any supplement.