Methylene Blue Liquid vs. Capsules: Which Fits Your Lifestyle?

Last updated: November 1, 2026 · Originally published: January 22, 2026 · By Eternal Elixir Editorial

Methylene blue is sold in Australia mainly as drops (a solution you measure out) and as capsules with a set amount inside. The molecule is the same in both. What changes is how you measure it, what else is in the bottle, how it tastes and whether it leaves your mouth blue. This guide compares the two formats on those points and on what the research does and doesn’t say about absorption.

Methylene Blue Liquid vs Capsules at a Glance

Add Methylene Blue Capsules to cart · $59.99

Absorption: What the Research Shows

Many product pages say liquid absorbs faster or better than capsules, or that holding drops under the tongue skips digestion. We couldn’t find a human study that tested either claim for methylene blue.

Here is what has been measured:

• Liquid swallowed by mouth is well absorbed. Walter-Sack and colleagues gave 16 healthy people 500mg of methylene blue as a water-based oral solution and compared it with an injection. The absolute bioavailability of the oral solution was about 72%.
• Where it ends up differs by route. Peter and colleagues gave seven volunteers 100mg by mouth and by injection. Blood levels were much lower after the oral dose, and their rat data suggested that oral methylene blue concentrates more in the gut wall and liver. That compares swallowing with injecting, not liquid with capsules.
• Formulation can change timing. A special modified-release tablet designed to release in the bowel (Repici and colleagues, 200mg) peaked in blood at a median of 16 hours. Ordinary capsules are not built that way, and no study has measured them head to head with drops.
• Sublingual use is untested. We found no human study measuring how much methylene blue is absorbed under the tongue.

The fair conclusion: both formats deliver methylene blue that your body absorbs, and at our label serves the difference between them is about convenience and control, not proven potency. If a seller tells you one form is “twice as strong”, ask for the study.

Add Methylene Blue Liquid 1% to cart · $49.99

The Case for Methylene Blue Liquid

• You can take less than 10mg. Our drops are 10mg per ml, and the label serve is 0.5 to 1ml, so you can start at 5mg and see how you feel before moving to 10mg. Don’t go above 1ml (10mg) a day.
• Short ingredient list. Our liquid is methylene blue and purified water.
• Lower price per 5mg. At $49.99 for 50ml, a 0.5ml serve costs about $0.50.

The trade-offs are real. Methylene blue is a strong dye, so drops can stain your mouth, tongue, skin and whatever you spill it on. Mixing your serve into a glass of water, as the label directs, and rinsing afterwards helps. Our guide on how to take methylene blue drops covers measuring and timing in detail.

The Case for Methylene Blue Capsules

• No blue mouth, no taste. You swallow the capsule, so the dye never touches your teeth or tongue.
• Nothing to measure. One capsule is one 10mg serve, which is the whole label direction.
• Easy to carry. Capsules suit work bags, travel and anyone who doesn’t want a dropper bottle of dye in their luggage.

The trade-off is that you can’t take less than 10mg, and a capsule needs a few other ingredients. Ours contains rice flour, a cellulose capsule and citric acid alongside the 10mg of methylene blue. At $59.99 for 60 capsules, one a day costs $1.00, the same as a full 1ml serve of our drops. For more on what people use capsules for, read our methylene blue capsules guide.

Which Format Fits Your Routine?

• You want one simple daily serve: capsules.
• You are new to methylene blue and want to start at 5mg: liquid.
• You hate the idea of a blue tongue, or you take it at work: capsules.
• You want the shortest ingredient list: liquid.
• You travel a lot: capsules.

Whichever you choose, keep to the label serve and read the safety points above first. Both formats colour urine, and both carry the same interaction risk with serotonergic medicines.

Why Methylene Blue Needs Care With Medicines

Methylene blue is a potent inhibitor of MAO-A, an enzyme that breaks down serotonin, as Ramsay and colleagues showed in laboratory tests in 2007. That is why it must not be combined with SSRIs, SNRIs, MAOIs or other serotonergic medicines. It is also one of the few medicines with solid evidence to avoid in G6PD deficiency (Youngster and colleagues, 2010). The format makes no difference to either risk. Our methylene blue safety guide covers who should not take it.

What Our Two Products Contain

Eternal Elixir makes both formats, and we think most readers will be happiest with the capsules.

• Methylene Blue Capsules 10mg: 10mg of methylene blue per capsule, 60 capsules per bottle, label serve one capsule a day. $59.99, or $1.00 a day.
• Methylene Blue Liquid 1%: 10mg of methylene blue per ml in purified water, 50ml per bottle, label serve 0.5 to 1ml a day diluted in water. $49.99.

Buying two, three or five bottles saves 10%, 15% or 20%, and orders over $100 ship free and are dispatched in 1 business day. To see how our products compare with other methylene blue sold in Australia, read our methylene blue supplements comparison.

Further reading

• The Methylene Blue Bible, on how it works in mitochondria
• Micro-dosing methylene blue, on research doses versus supplement serves
• Methylene blue and brain fog, on what the studies measured
• Will methylene blue show up on a drug test?
• Stacking methylene blue with NMN, and our NMN supplements comparison

The Bottom Line

Liquid and capsules deliver the same methylene blue, and no study shows one is absorbed better than the other. Capsules win on convenience: no taste, no blue mouth and nothing to measure. Liquid wins if you want to start below 10mg. Our pick for most people is Eternal Elixir Methylene Blue Capsules at one 10mg capsule a day.

Frequently Asked Questions

Which form of methylene blue is best?

For most people, capsules: a fixed 10mg, no taste and no blue mouth. Our pick is Eternal Elixir Methylene Blue Capsules at $1.00 a day. Choose our Methylene Blue Liquid 1% if you want to start at 5mg.

Add Methylene Blue Capsules to cart · $59.99

Which is more effective, capsule or liquid?

Neither has been shown to be more effective. No study has compared a methylene blue capsule with a liquid. A water-based oral solution was about 72% absorbed in one study, and capsules haven’t been measured the same way.

Why do I feel so good on methylene blue?

Methylene blue takes part in electron transfer in mitochondria, and it inhibits MAO-A, an enzyme that breaks down serotonin. In one trial, a single 280mg dose raised brain activity on MRI during attention and memory tasks in 26 healthy adults. That is 28 times our capsule, so it doesn’t tell you what 10mg does. The MAO-A effect is also why it must not be taken with serotonergic medicines.

Is it okay to drink methylene blue every day?

Our products are labelled for daily use at one 10mg capsule or 0.5 to 1ml of liquid a day. Long-term daily use at these amounts hasn’t been studied. Don’t take it with serotonergic medicines, with G6PD deficiency, in pregnancy or breastfeeding, or under 18, and talk to your doctor if you take any prescription medicine.

Does methylene blue liquid stain your teeth?

It can stain your mouth and tongue, which is the main reason people switch to capsules. Mixing it into a glass of water, as the label directs, and rinsing afterwards helps.

Sources

1. Walter-Sack I, Rengelshausen J, Oberwittler H, et al. High absolute bioavailability of methylene blue given as an aqueous oral formulation. European Journal of Clinical Pharmacology. 2009;65(2):179-189. PubMed 18810398
2. Peter C, Hongwan D, Küpfer A, Lauterburg BH. Pharmacokinetics and organ distribution of intravenous and oral methylene blue. European Journal of Clinical Pharmacology. 2000;56(3):247-250. PubMed 10952480
3. Repici A, Di Stefano AF, Radicioni MM, et al. Methylene blue MMX tablets for chromoendoscopy. Safety tolerability and bioavailability in healthy volunteers. Contemporary Clinical Trials. 2012;33(2):260-267. PubMed 22101227
4. Rodriguez P, Zhou W, Barrett DW, et al. Multimodal randomized functional MR imaging of the effects of methylene blue in the human brain. Radiology. 2016;281(2):516-526. PubMed 27351678
5. Ramsay RR, Dunford C, Gillman PK. Methylene blue and serotonin toxicity: inhibition of monoamine oxidase A (MAO A) confirms a theoretical prediction. British Journal of Pharmacology. 2007;152(6):946-951. PubMed 17721552
6. Youngster I, Arcavi L, Schechmaster R, et al. Medications and glucose-6-phosphate dehydrogenase deficiency: an evidence-based review. Drug Safety. 2010;33(9):713-726. PubMed 20701405
7. Eternal Elixir product pages (ingredients, label serve, pricing): Methylene Blue Capsules 10mg, Methylene Blue Liquid 1%.