Bluesun Methylene Blue: What Amazon's Own Records Show

Bluesun sells methylene blue capsules and liquid drops on Amazon under its own e-commerce site (bluesun.bio). The capsules passed Nutricel's independent water test, producing the deep blue color expected of genuine methylene blue. But per Nutricel's filed Amazon Brand Registry reports, both Bluesun listings carry documented fake-review, listing-violation, and FDA-labeling-noncompliance flags, and notes on file indicate Amazon acknowledged the capsule listing should be removed, yet it remained active as of the database's last update. Current verdict in Nutricel's lab-test database: Avoid.

• Passed the water test, not yet lab-assayed. Bluesun's 90-count, 12 mg capsules produced a deep blue water-test result, but the actual milligram dose has not been confirmed by an independent lab assay.
• Documented Amazon Brand Registry flags. Both the capsule listing (ASIN B0F2MJJ7TW) and the drops listing (ASIN B0F2M2XYL3) are flagged for fake reviews, a listing violation, and FDA labeling noncompliance.
• A real, operating site, but limited transparency. Bluesun runs a full storefront with a real product catalog, though it does not publicly name founders, disclose a business address, or identify its manufacturer.

Important: Methylene blue has documented interactions with serotonergic medications including SSRIs and MAOIs. Review the full adverse medications list before use, regardless of brand.

Bluesun operates its own e-commerce site, bluesun.bio, with a full product catalog and working checkout, selling methylene blue drops, capsules, sprays, and a companion cayenne pepper product. That makes Bluesun a real, operating storefront rather than an anonymous Amazon-only drop-shipper.

What the site does not do is name specific founders, disclose a business address, or identify its manufacturer. Its own "About" page describes a general mission around purity and testing without any of those specifics, so they cannot be independently confirmed from the site alone.

Bluesun sells two methylene blue products on Amazon: a 90-count, 12 mg capsule (ASIN B0F2MJJ7TW) and a 1% liquid drops formula (ASIN B0F2M2XYL3). The capsule listing has accumulated 2,163 ratings at a 4.2-star average, making it one of the most-reviewed methylene blue listings tracked in Nutricel's lab-test database. Because the brand carries real sales volume and an operating company site, its documented Amazon marketplace issues are worth understanding on their own terms rather than dismissing as an obvious scam.

Per Nutricel's filed Amazon Brand Registry reports, both Bluesun Amazon listings carry the same three documented flags: fake reviews, a listing violation, and FDA labeling noncompliance (a marketing and labeling claims issue). Notes on file indicate Amazon acknowledged that the capsule ASIN should be removed, yet the listing remained active as of the lab-test database's last update on July 14, 2026.

This does not mean the product inside the bottle is unsafe; the capsules did pass Nutricel's water test. It means the Amazon listing itself has documented marketplace-integrity issues, separate from what is actually in the capsule, that buyers should weigh before purchasing through that specific listing.

These three terms get used loosely online, so here is what each one specifically covers on Amazon:

• Fake reviews. Reviews that violate Amazon's Community Guidelines, including incentivized reviews that were not disclosed, reviews from accounts with no history of purchasing the product, or coordinated review activity designed to inflate a rating.
• Listing violation. A catch-all category covering issues with how a product is represented on its detail page, such as misleading claims, incorrect categorization, or content that does not match what is actually being sold.
• FDA labeling noncompliance. Marketing or label language that crosses into disease-treatment or diagnostic claims a dietary supplement is not permitted to make, or that omits information required on a supplement label.

All three are marketplace and marketing-integrity issues. None of them, on their own, is a direct measurement of what is actually in the bottle, which is exactly why Nutricel's water and lab testing exists as a separate, independent check.

Nutricel's database uses two independent checks. A water test dissolves the product and checks for the deep blue color genuine methylene blue produces; a weak or off-color result signals a low or diluted dose. A lab test sends the product to a third-party lab to measure the actual milligram content against the label claim. A product needs to pass both to earn a Recommended result.

Bluesun's capsules have only cleared the first check. The water test result is a real, positive signal, but it does not confirm the capsules deliver the full 12 mg claimed on the label; only an independent lab assay can do that. Until that assay happens, the actual dose in each capsule remains unverified, on top of the separate, already-documented Amazon listing issues above.

You do not need access to Brand Registry data to do a basic gut check on any supplement listing before you buy. A few signals worth checking:

• A review burst. Sort by most recent and check whether a large cluster of five-star reviews landed within the same few days or weeks, rather than spreading naturally over the listing's lifetime.
• Repeated phrasing. Several reviews using near-identical language or structure is a common sign of incentivized or coordinated reviews.
• Low Verified Purchase share. Compare how many reviews carry Amazon's Verified Purchase badge against the total count. A large gap is worth noticing.
• No photos, no specifics. Genuine long-term users of a supplement tend to mention dose, timing, or how they use a product. A wall of generic praise with no photos or detail is a weaker signal of real use.

No single signal proves manipulation on its own. But several of these showing up together on one listing is a reasonable prompt to go check that brand's independent testing status, using the database below, before you buy.

Nutricel's full lab and water test database covers 165 methylene blue products and lets you search by brand name, filter by product type or seller country, and see the current verdict, along with water test result, lab test result, and claimed dose, for each one. Before you buy or reorder any methylene blue product, including Bluesun or any brand mentioned here, search for it by name and check its current verdict, since testing and Amazon listing status can change over time.

Do not take methylene blue, from any brand, if you are currently using:

• SSRIs or MAOIs (risk of serotonin syndrome)
• Any serotonergic medication

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

Every Nutricel product uses USP-grade methylene blue, is manufactured in an NSF-certified cGMP facility in the United States, and is independently tested through Eurofins. The difference between them is what they are built to support alongside the methylene blue itself.

Blue Boost is Nutricel's core formula. If your focus is methylene blue itself and you want a clean, research-backed capsule built around absorption and cellular energy, this is it.

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

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), studied for supporting glutathione levels and brain function in aging populations.

Blue Remove combines zeolite, curcumin, and nattokinase for cellular detox, circulatory, and inflammation support.

Blue Liquid delivers USP-grade methylene blue in a precise dropper bottle for those who prefer liquid format and flexible dosing.

• Nutricel. Methylene Blue Lab and Water Test Database, Bluesun entry. Full methodology and per-product results, updated July 14, 2026.
• Amazon. Amazon Brand Registry. The program brand owners use to report suspected IP infringement, listing violations, and regulatory compliance concerns.
• U.S. Food and Drug Administration. Drug Safety Communication: methylene blue and serotonergic drugs (archived).

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. Every figure in this piece comes directly from Nutricel's public lab test database and its underlying Amazon Brand Registry reports, linked in the references above. Sam is not a medical professional, and this article is intended as education rather than medical advice. Always speak with your healthcare provider before starting any supplement.