150 years of medical use. One blueberry gummy. Your clarity back
Cerulean Blue™ Methelyne Blue Gummies
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USP-Grade Purity
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150 Years of Science
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90-Day Guarantee
Start Your Life Changing Journey Here
90 Day Money Back Guarantee | Pause or cancel anytime
To see results we recommend use for 2 months*
The Amazon Version Isn't The Same Product 🚨
Industrial-grade MB contains heavy metals and contaminants. Third-party sellers. No batch testing. No guarantee.
Cerulean Labs uses USP-grade pharmaceutical methylene blue third-party tested for purity and safety. We publish our Certificate of Analysis.
Lauren J.
Two years of Long COVID fog. Tried everything. This is the first thing that's actually moved the needle. Week four and I'm back to reading full articles without re-reading every paragraph
Post-viral brain fog isn't imaginary. COVID damages mitochondria in brain cells reducing ATP production. That's why everything still feels foggy, even when your test results look normal. Methylene blue is the only supplement that directly targets the mechanism behind it.
Your Doctor Said Your Blood Work Is Fine. Your Brain Knows It Isn't
The Four Foundations of Cerulean Labs™ Methylene Blue Gummies
Why Methylene Blue Works When Everything Else Hasn't
Purity
USP-Grade Not IndustrialThere are two grades of methylene blue: industrial (used in fish tanks and fabric dye) and USP pharmaceutical-grade (used in hospitals and clinical research). We use pharmaceutical-grade only. Every batch is third-party tested for heavy metals, potency, and purity — and we publish the results.
Science
Mechanism-Specific ResearchOur formulation is built on the compound studied at the University of Texas (fMRI, 7% memory improvement), in active Alzheimer's clinical trials at TauRx, and recommended by Dr. Sarah Myhill for mitochondrial fatigue. We don't cite vague 'brain health studies.' We cite mechanism-specific human research.
Transparency
No Hidden Subscriptions. No Tricks.We've seen what some competitors do — auto-enrolling customers in $49.99/month VIP programs without clear disclosure. We don't do that. One-time purchase or flexible subscription, both clearly labelled. Cancel anytime. No fine print.
Formula
Made in Small, Verified BatchesWe don't chase volume at the cost of quality. Each batch is manufactured at a GMP-certified US facility and carries a batch-specific Certificate of Analysis. You can request yours anytime.
Medical Studies To Prove.
150 Years Of Science To Back It.
140 years of medical use. 200+ published studies. Active Alzheimer's clinical trials. We don't make claims we can't back.
Real People, Real Results
Thousands of people. One thing in common they almost didn't try it.
"Two years of Long COVID fog. My doctors kept saying my bloods were fine. I knew something was still wrong. Week four on Cerulean Labs and I finished a full work report without losing my train of thought once. First time since 2022."
"I was the person who laughed at supplement culture. Then perimenopause hit and I couldn't string a sentence together at work. Six weeks in and I feel like the version of me I thought was gone. I tell every woman I know over 40 about this.""
"I tried liquid methylene blue first the mess, the staining, the taste. Gave up. These gummies are a completely different experience. Same compound, none of the nightmare. My clarity is back and my morning routine actually sticks now."
"watched my dad decline at 67. I'm not waiting around for that. The UT Austin memory research is what sold me. Three months in sharper mornings, less afternoon fog, and I actually feel proactive about my brain health for the first time."
Cerulean Vs.FakeBrands
Cerulean Vs.FakeBrands
Not All Methylene Blue Gummies
Are Same, Espacially Amazon one's
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USP-Grade Pharmaceutical
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Published COA Every Batch
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GMP-Certified US Facility
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Heavy Metal Testing
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No Hidden Subscriptions
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90-Day Money-Back Guarantee
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SSRI Safety Warning (Transparent)
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What Our Customers Are saying...
Present In My Own Life Again
I tapered off Lexapro and the withdrawal fog was almost as bad as the depression. Three weeks in on this — clearer, less flat, more motivated. This is the most hopeful I've been in a while.
Finally Feel Like Myself Again
I forgot the word 'quarterly' in a board meeting. My gynecologist said the brain fog was normal. It didn't feel normal. By week three on Cerulean Labs I was finishing my sentences again. Week five, my husband noticed before
Nothing Else Touched It. This Did.
COVID stole my brain in 2022. I tried NAC, lion's mane, B12, guanfacine. I'm 6 weeks in and last week I finished a continuing education module in one sitting for the first time since my infection. I almost cried.
Cautiously Impressed
I've tried Prevagen, fish oil, everything. Most feel like expensive hope. This has actual clinical research behind it. The mental fatigue I wrote off as middle age seems to have lifted.
Real Science Vs. Myth
What the research actually says, and what the internet gets wrong.
It's Just A Fish Tank Chemical
Methylene blue was the first synthetic drug in human history, developed in 1876. It's on the WHO List of Essential Medicines. Hospitals have used it for 140 years. The fish tank version is industrial waste. Ours is USP pharmaceutical-grade.
Supplements Can't Fix Brain Fog
Most supplements target neurotransmitters. Brain fog from Long COVID, menopause, or aging is a mitochondrial energy problem not a chemistry problem. Methylene blue targets the power supply directly. Different mechanism, different results.
If It Worked, Your Doctor Would Know About It
Methylene blue has been in hospitals for 140 years. Doctors use it for poisoning and blood disorders every day. The gap isn't the science it's that most physicians aren't trained in low-dose mitochondrial supplementation. The research is there. It's just not in their textbook yet.
There's No Real Science Behind It
A University of Texas clinical trial — published in Radiology showed a ~7% improvement in memory retrieval after a single dose, confirmed by fMRI brain scans. It's currently in Phase 2/3 Alzheimer's clinical trials. 200+ published studies exist.
Frequently Asked Questions
Find answers to common questions about our products, shipping, returns, and more.
Is methylene blue safe?
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At the low doses in Cerulean Labs gummies (5mg per gummy), methylene blue has a well-established safety profile backed by 150+ years of medical use. It's on the WHO List of Essential Medicines and is FDA-approved as a pharmaceutical compound.
How long until I feel something?
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Some users report acute effects (increased alertness, sharper focus) within the first 1-2 hours after their first dose. But the more meaningful, cumulative benefits reduced brain fog, improved recall, sustained mental energy typically develop over 2-6 weeks of consistent daily use. Mitochondrial restoration is not an overnight process. We recommend committing to at least 60 days before drawing conclusions, which is why we offer a 61-day guarantee.
What makes your Gummies different from other methylene blue brands?
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Three things. First: purity. We use USP-grade pharmaceutical methylene blue not industrial grade and publish a Certificate of Analysis (COA) for every batch, including heavy metal testing. Second: transparency. We clearly disclose the SSRI interaction warning, the G6PD contraindication, and honest dosing guidance. Many brands bury or ignore these. Third: we don't run hidden subscription programs. Your subscription (if you choose one) is clearly disclosed, cancellable anytime, with no penalty.
Why is my urine blue?
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This is completely normal and temporary. Methylene blue passes through your kidneys and turns urine a greenish-blue color for a few hours. This is actually used in clinical settings as a confirmation of absorption. It poses no health risk and fades within 3-6 hours. Think of it as your brain's receipt confirmation that the compound was absorbed and is circulating.
How long until I feel something?
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Some users report acute effects (increased alertness, sharper focus) within the first 1-2 hours after their first dose. But the more meaningful, cumulative benefits, reduced brain fog, improved recall, sustained mental energy — typically develop over 2-6 weeks of consistent daily use. Mitochondrial restoration is not an overnight process. We recommend committing to at least 60 days before drawing conclusions, which is why we offer a 90-day guarantee.
I've tried every supplement and nothing works. Why is this different?
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Most brain supplements target your neurotransmitters — serotonin, dopamine, acetylcholine. If your problem is mitochondrial energy production (which is the root cause of Long COVID fog, menopausal brain fog, and age-related cognitive decline) those supplements were always targeting the wrong system. Methylene blue targets your cellular hardware. That's why it works for people who've failed everything else.
How long until I feel something?
+
Some users report acute effects (increased alertness, sharper focus) within the first 1-2 hours after their first dose. But the more meaningful, cumulative benefits reduced brain fog, improved recall, sustained mental energy typically develop over 2-6 weeks of consistent daily use. Mitochondrial restoration is not an overnight process. We recommend committing to at least 60 days before drawing conclusions, which is why we offer a 61-day guarantee.
Why is my urine blue?
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This is completely normal and temporary. Methylene blue passes through your kidneys and turns urine a greenish-blue color for a few hours. This is actually used in clinical settings as a confirmation of absorption. It poses no health risk and fades within 3-6 hours. Think of it as your brain's receipt confirmation that the compound was absorbed and is circulating.
I've tried every supplement and nothing works. Why is this different?
+
Most brain supplements target your neurotransmitters — serotonin, dopamine, acetylcholine. If your problem is mitochondrial energy production (which is the root cause of Long COVID fog, menopausal brain fog, and age-related cognitive decline) those supplements were always targeting the wrong system. Methylene blue targets your cellular hardware. That's why it works for people who've failed everything else.