Last updated: · Published by Eternal Elixir
One drop of a 1% methylene blue solution holds 500 mcg. One capsule holds 10 mg, twenty times as much. That ratio sits at the center of the methylene blue drops vs capsules decision, because the two formats deliver the same compound in very different steps. This guide puts Eternal Elixir’s two US formats side by side: what each bottle contains, how to convert between them, what a month costs at different daily amounts, and what the absorption research does and does not show.
Disclosure: Eternal Elixir makes and sells supplements. When our own products appear in a comparison, they are named as Eternal Elixir products. No brand pays to be included. Our editorial standards
If you need the reasoning behind any milligram figure, our methylene blue dosage guide explains where each number comes from. This page covers the choice that comes after that: which format fits the way you actually take it.
Key takeaways
- Methylene blue drops vs capsules comes down to dose control versus convenience. Eternal Elixir’s 1% liquid gives 500 mcg per drop, while each capsule gives a fixed 10 mg.
- Cost is a tie at about $1.00 per 10 mg ($49.99 for 50 mL of drops, $59.99 for 60 capsules at current US prices). Only the liquid can measure amounts below 10 mg.
- Both formats carry the same interaction risk. Avoid methylene blue with SSRIs, SNRIs, MAO inhibitors or other serotonergic medicines unless a prescriber directs it.
Methylene Blue Drops vs Capsules at a Glance
Both products use USP-grade methylthioninium chloride, which is the chemical name for methylene blue. What differs is the delivery. The liquid lets you measure in half-milligram steps. The capsule fixes the amount and keeps the dye away from your mouth.
| Factor | Methylene Blue Liquid 1% (drops) | Methylene Blue Capsules 10mg |
|---|---|---|
| Methylene blue per unit | 500 mcg per drop, 10 mg per full dropper | 10 mg per capsule |
| Total methylene blue per bottle | 500 mg in 50 mL | 600 mg across 60 capsules |
| Number of 10 mg servings | 50 | 60 |
| Other label ingredients | None declared | 10 mg ascorbic acid, rice flour, cellulose shell |
| Smallest amount you can measure | 500 mcg (one drop) | 10 mg (one capsule) |
| Mess | Can tint the tongue and teeth and stains fabric | Sealed shell, nothing touches the mouth |
| Current US price | $49.99 | $59.99 |
| Best for | Starting low and adjusting in small steps | A fixed daily amount with no measuring |
The bottles hold different totals, which is why the prices look further apart than they are. Once you divide by the methylene blue inside, the two formats land on the same cost per serving.
The two labels also share more than the price table suggests. Both name USP-grade methylene blue as the raw ingredient, and both carry the same caution text about serotonergic medicines, G6PD deficiency, pregnancy and breastfeeding. Switching format changes how you measure. It does not change who should avoid the compound.
What One Drop Holds: Converting Between Formats
A 1% solution contains 1 g of methylene blue per 100 mL, which works out to 10 mg per mL. Our label states 500 mcg per drop and 10 mg per full dropper, so a full dropper is about 1 mL and roughly 20 drops. The whole 50 mL bottle holds about 1,000 drops.
The table below converts common amounts between the two formats. It is arithmetic from the label, and it is not a recommendation to take any of these amounts.
| Methylene blue amount | Drops of 1% liquid | Capsule equivalent |
|---|---|---|
| 0.5 mg | 1 drop | None (capsules come in 10 mg only) |
| 1 mg | 2 drops | None |
| 2.5 mg | 5 drops | None |
| 5 mg | 10 drops | None |
| 10 mg | 20 drops (one full dropper) | 1 capsule |
| 20 mg | 40 drops (two full droppers) | 2 capsules |
Drop size changes with the angle of the dropper and how hard you squeeze, so a counted dose is an estimate. The full dropper gives you a second reference point. If 20 counted drops look very different from one full dropper, slow down and recount. With a compound this potent, small measuring errors matter more than they would with a vitamin.
The liquid also allows an amount to be divided across the day. If a clinician suggests splitting a dose, drops can do it in 0.5 mg steps. A capsule cannot be split cleanly, because the powder inside is meant to stay sealed until it reaches the stomach.
Capsules remove the counting problem completely. Each one is filled to 10 mg, so the amount is the same every day and nobody in the house has to learn a counting routine.
Stocking up on methylene blue? Every bottle of Eternal Elixir’s Methylene Blue Capsules 10mg carries 60 capsules and ships fast across the United States. Browse the range →
What a Month Costs at Different Daily Amounts
Per 10 mg, the two formats cost the same: $49.99 across 50 servings for the drops and $59.99 across 60 capsules both come to about $1.00. The difference opens up below 10 mg, where only the liquid can measure the amount and one bottle then lasts much longer.
| Daily amount | Drops: days per bottle | Drops: cost per 30 days | Capsules: days per bottle | Capsules: cost per 30 days |
|---|---|---|---|---|
| 2.5 mg | 200 | $7.50 | Not possible | Not possible |
| 5 mg | 100 | $15.00 | Not possible | Not possible |
| 10 mg | 50 | $29.99 | 60 | $30.00 |
| 20 mg | 25 | $59.99 | 30 | $59.99 |
These figures use the current prices on eternalelixir.com. The drops are on sale from $59.99 and the capsules from $69.99, so the totals will move if those prices change.
Shipping is left out. Orders over $100 ship free in the US, which two bottles of either format cover once the sale ends. The table describes cost only. It does not suggest that any of these amounts suits you.
Put another way, at 10 mg a day a capsule bottle lasts two months and a dropper bottle lasts about seven weeks. At 2.5 mg a day the same dropper bottle stretches to more than six months, which is where the liquid earns its place for anyone taking small amounts.
Does the Liquid Absorb Better Than the Capsule?
Methylene blue is well absorbed by mouth. In a crossover study in European Journal of Clinical Pharmacology, 16 healthy adults received 50 mg intravenously and 500 mg as an oral water-based solution a week apart. The oral solution reached an absolute bioavailability of about 72% (Walter-Sack et al., 2009).
That test dose was fifty times a 10 mg serving, and the study was designed around malaria treatment, so it tells you the compound absorbs well without telling you much about supplement amounts.
We found no study that compared a methylene blue capsule with a liquid head to head. Any claim that drops work faster or that capsules absorb more completely goes beyond the published data. A capsule shell dissolves in the stomach within minutes, and the methylene blue inside then behaves like any other oral dose.
The best-known human brain study also used an oral dose. In a randomized, double-blind, placebo-controlled trial in Radiology, 26 adults aged 22 to 62 took a single low dose of methylene blue or a placebo. One hour later, functional MRI showed higher activity during attention and short-term memory tasks, and the methylene blue group gave 7% more correct answers on memory retrieval (Rodriguez et al., 2016).
It was one dose in a small group, it did not compare formats, and it does not show what daily use does.
The capsule adds 10 mg of vitamin C (ascorbic acid) to each serving. No study we found tested whether that small amount changes anything, so treat it as a label difference rather than a reason to choose one format.
Methylene Blue Drops vs Capsules: Which Should You Choose?
Neither format is stronger or purer. The right one depends on whether you need fine control over the amount, or a dose you never have to think about. Run through these questions first:
- Is the amount you plan to take below 10 mg, or not yet settled?
- Would a blue mark on a counter or a tinted tongue put you off daily use?
- Do you take it at work or while traveling?
- Will someone else in your home be measuring it?
A yes to the first question points to the liquid. Yes answers to the others point to capsules.
Best for starting low or adjusting: the drops
Choose the Eternal Elixir Methylene Blue Liquid 1% if you want to begin well below 10 mg or change your amount in small steps. It is the only one of the two that can measure 1 mg or 2.5 mg, and at those amounts a single bottle lasts months. The tradeoff is the dye itself. It can tint your tongue for a while and it marks counters and clothes, so measure it into a glass of water over the sink.
Best for a fixed routine and travel: the capsules
Choose the Eternal Elixir Methylene Blue Capsules 10mg if your amount is 10 mg or a multiple of it. There is nothing to count, nothing to taste and no blue stain on a bathroom counter. A capsule bottle also travels without the leak risk of a dropper bottle in a bag.
Best for value: a tie
At about $1.00 per 10 mg either way, price should not decide this. The drops only come out cheaper per month when your daily amount sits below 10 mg. Try the format that matches your routine, and view Methylene Blue Liquid 1% first if you are still working out your amount. If you want to see how both formats compare with other brands on label quality and cost, our methylene blue supplement comparison ranks them against the wider market.
Some people start on the liquid, settle on an amount, then move to capsules once that amount is a whole multiple of 10 mg. One capsule replaces 20 drops. If methylene blue is one part of a broader energy routine, our NMN 500mg capsules are the other mitochondria-focused product in the Eternal Elixir range.
Who should skip both formats
The safety rules are identical for drops and capsules. Methylene blue is a potent, reversible inhibitor of the enzyme monoamine oxidase A in laboratory testing, which explains the reports of serotonin toxicity in people taking serotonergic antidepressants (Ramsay et al., 2007).
Do not take either format with SSRIs, SNRIs, MAO inhibitors or other serotonergic drugs unless a prescriber directs it, because serotonin toxicity can be life-threatening. Skip it too if you have G6PD deficiency, or if you are pregnant or breastfeeding. Our methylene blue side effects guide lists the warning signs and the other medicines to check with your doctor.
Methylene Blue Drops vs Capsules FAQ
Is methylene blue safe to take daily?
Long-term trials of daily methylene blue at supplement amounts have not been published, and the human studies above tested single doses. If you take it daily, stay within the label directions, keep it away from serotonergic medicines and ask your doctor first. Our methylene blue benefits guide grades what the research does and does not support.
How many drops of methylene blue equal one 10 mg capsule?
Twenty drops of a 1% solution at 500 mcg per drop, or one full dropper, equal the 10 mg in one Eternal Elixir capsule. Drop size varies, so the full dropper is the steadier measure.
Can I switch from methylene blue drops to capsules?
Yes, when your amount is a whole multiple of 10 mg. One capsule replaces 20 drops. Amounts below 10 mg have no capsule equivalent, so those stay on the liquid. Check any change with whoever advised your dose.
Which lasts longer, a bottle of drops or a bottle of capsules?
At 10 mg a day the capsule bottle lasts longer, 60 days against 50 for the drops. Below 10 mg the drops win easily, because the 50 mL bottle holds about 1,000 half-milligram drops.
Is indigo carmine the same as methylene blue?
No. Indigo carmine is a separate blue dye from the indigo family, used mainly as a diagnostic dye. Methylene blue belongs to a different chemical class, and the two are not interchangeable.
What are the potential side effects of taking methylene blue?
Blue or green urine is common and expected with either format. Some people report stomach upset or headache, and the liquid can leave a tinted tongue. The serious risk is serotonin toxicity when methylene blue is combined with antidepressants and other serotonergic drugs, which our side effects guide covers in detail.
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Sources
- Walter-Sack I, et al. High absolute bioavailability of methylene blue given as an aqueous oral formulation. European Journal of Clinical Pharmacology. 2009. PMID 18810398
- Rodriguez P, et al. Multimodal randomized functional MR imaging of the effects of methylene blue in the human brain. Radiology. 2016. PMID 27351678
- Ramsay RR, et al. Methylene blue and serotonin toxicity: inhibition of monoamine oxidase A (MAO A) confirms a theoretical prediction. British Journal of Pharmacology. 2007. PMID 17721552
