Is Ebselen-Containing Oral Capsule Spi-1005 worth taking?

No, not for most people. This is an investigational drug, not an everyday supplement. Unless you're in a clinical trial, this is one to watch from the sidelines.

How much Ebselen-Containing Oral Capsule Spi-1005 should I take?

Doses in clinical trials are around 400-800mg daily, split into two doses. This isn't something to dose yourself. Follow trial protocols.

How long does Ebselen-Containing Oral Capsule Spi-1005 take to work?

There's no sensation to time. It's an investigational capsule studied around a defined noise exposure, and the read out is a hearing test hours to days later.

What happens when you first take Ebselen-Containing Oral Capsule Spi-1005?

Nothing. It's not designed for acute effects. It's about protecting cells from future damage.

What does Ebselen-Containing Oral Capsule Spi-1005 do with regular use?

The goal is reduced hearing damage from loud noise exposure. It's not about what you feel, it's about what you prevent.

Is Ebselen-Containing Oral Capsule Spi-1005 well tolerated?

Generally well-tolerated in clinical trials. The main risk is getting too much selenium. Stick to established dosages and don't combine with other selenium supplements.

What does Ebselen-Containing Oral Capsule Spi-1005 feel like?

You feel nothing. Think of it like chemical earplugs. The benefit is the absence of damage later on.

What is the overlooked benefit of Ebselen-Containing Oral Capsule Spi-1005?

It imitates the enzyme glutathione peroxidase, and its selenium is locked inside a ring rather than free, which is why other selenium supplements are the thing to watch alongside it.

Is this a normal supplement?

No. It's an investigational drug, primarily studied for hearing loss. Not an over-the-counter vitamin.

Can I take it before a concert to protect my hearing?

That's the theory being tested. But studies are still underway to confirm the right dose and timing. We're not there yet.

Is it just a fancy form of selenium?

It's a selenium-containing compound, but it acts very differently. It's specifically designed to mimic an enzyme. Don't swap it for a regular selenium pill.

Ebselen-Containing Oral Capsule Spi-1005

All ingredients

Ingredients/Compound/Ebselen-Containing Oral Capsule Spi-1005

Ebselen-Containing Oral Capsule Spi-1005.

Read pending.Ebselen-Containing Oral Capsule Spi-1005 is in the library; the clinical read is in the queue.

Research-backed compound with potential health benefits. Mimics one of your body's master antioxidant enzymes. It's being studied primarily to protect the delicate cells of the inner ear from noise damage.

200 to 600mgDaily amount

Reviewed March 2026

Compound

Ebselen-Containing Oral Capsule Spi-1005IngredientMD

Category: Compound

What Ebselen-Containing Oral Capsule Spi-1005 is, and what it does.

Does it work: No, not for most people. This is an investigational drug, not an everyday supplement. Unless you're in a clinical trial, this is one to watch from the sidelines.
How much to take: Doses in clinical trials are around 400-800mg daily, split into two doses. This isn't something to dose yourself. Follow trial protocols.
Time to feel it: There's no sensation to time. It's an investigational capsule studied around a defined noise exposure, and the read out is a hearing test hours to days later.
The first dose: Nothing. It's not designed for acute effects. It's about protecting cells from future damage.
With regular use: The goal is reduced hearing damage from loud noise exposure.
How well tolerated: Generally well-tolerated in clinical trials. The main risk is getting too much selenium. Stick to established dosages and don't combine with other selenium supplements.
How it feels: You feel nothing. Think of it like chemical earplugs. The benefit is the absence of damage later on.
The overlooked benefit: It imitates the enzyme glutathione peroxidase, and its selenium is locked inside a ring rather than free, which is why other selenium supplements are the thing to watch alongside it.

200 to 600mg a day is where Ebselen-Containing Oral Capsule Spi-1005 works.

How much to take a dayMedium confidence

200 to 600mg

Daily maintenanceThe everyday amount, and where most daily supplements sit. This is the one you take month after month.

1,200mgClinical territory. Trials run high on purpose, for a set number of weeks, against one measured outcome. Impressive to hit, and not what a daily product is for.

Above 1,800mgPast what the research covers. More capsules rather than more effect.

The shaded band is where the dosing trials landed.

Source: Kil et al., Lancet, 2017 (SPI-1005 hearing loss trial)

The proof, claim by claim.

These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.

Read pending.

Ebselen-Containing Oral Capsule Spi-1005 is documented in the library; the clinical read is in the queue. Nothing about the strength of the research prints until the read is done.

Glutathione peroxidase mimetic activityIn vitro study
Temporary hearing threshold shift after loud sound exposureRandomised trial
Tolerability in healthy adultsRandomised trial
Protection of inner ear hair cells from oxidative stressAnimal study

PubMedCochraneClinicalTrials.govNIH ODSSUPP.AILabs test. IngredientMD verifies.PubMedCochraneClinicalTrials.govNIH ODSSUPP.AILabs test. IngredientMD verifies.

Questions people ask about Ebselen-Containing Oral Capsule Spi-1005.

Is this a normal supplement?: No. It's an investigational drug, primarily studied for hearing loss. Not an over-the-counter vitamin.
Can I take it before a concert to protect my hearing?: That's the theory being tested. But studies are still underway to confirm the right dose and timing. We're not there yet.
Is it just a fancy form of selenium?: It's a selenium-containing compound, but it acts very differently. It's specifically designed to mimic an enzyme. Don't swap it for a regular selenium pill.
What are the side effects?: It's usually well-tolerated. Some people report mild stomach upset. The biggest theoretical concern is selenium toxicity if you take way too much.
Where can I buy it?: You generally can't. It's available through clinical trials or maybe a specialized compounding pharmacy with a doctor's prescription. It's not on supplement shelves.

No pairing data for Ebselen-Containing Oral Capsule Spi-1005 yet.

Nothing on file for Ebselen-Containing Oral Capsule Spi-1005, either from a combination trial or from settled biochemistry. When either lands, it appears here with its source.

No pairing for Ebselen-Containing Oral Capsule Spi-1005 has cleared review yet.

Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.

No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.

Research strength. Research strength says how much work stands behind the combination. It is never a product score.

Independent record. Every finding is cited to a named trial, dated, and never written by the brand.

21 pairings are live across the library today. Checked 9 August 2026.

Who should be cautious

Nothing specific on file for Ebselen-Containing Oral Capsule Spi-1005. Match the label to the daily amount above, and tell your doctor what you take.

Not medical advice. Show the label to your pharmacist.

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.