Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Homotaurine

Amino-acidTaurine analogBest with a meal

Useful mainly for people exploring a memory-support supplement, with the caveat that the drug trial failed its endpoints.

Quick decision guide

May help most

people exploring a memory-support supplement, with the caveat that the drug trial failed its endpoints

Common dosing range

100–150 mg twice daily (as used in studies)

When to expect effects

Months (if any)

Watch out for

Pivotal Alzheimer's trial did not meet its primary endpoints; benefit is unproven

What is it

Homotaurine (3-amino-1-propanesulfonic acid; tramiprosate) is a small synthetic sulfonic acid analog of taurine. It was investigated as a drug candidate for Alzheimer's disease (tramiprosate trade name Alzhemed) and is now marketed as a supplement for cognitive support.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You understand the main trial failed and benefit is unproven
You want to trial it for cognitive support and tolerate it well

Probably skip if…

You want a proven treatment for cognitive decline
You take multiple CNS or cognitive medications without clinician input
You are pregnant or breastfeeding

Evidence at a glance

cognitive decline / alzheimer's disease

Mixed Evidence
Effect
Not demonstrated
Best fit
uncertain; possibly subgroups in post hoc analyses
Time
Months

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

cognitive decline / alzheimer's disease

Disease adjunct
Mixed Evidence

Homotaurine (tramiprosate) binds amyloid-beta and was developed to interfere with plaque formation, but its pivotal Phase III Alzheimer's trial did not meet its primary endpoints, ending drug development. Some post hoc and smaller supplement studies suggest possible signals in certain subgroups, but these are exploratory and not confirmatory. Overall the clinical evidence is weak and conflicting.

Effect size
Not demonstrated
Time to effect
Months
Best fit
uncertain; possibly subgroups in post hoc analyses
Less likely
people expecting a reliable cognitive benefit

Bottom line: The main trial failed; any cognitive benefit is unproven and based on weak, mixed data.

Evidence is mixed

The Phase III trial missed its endpoints while post hoc and supplement analyses hint at possible subgroup effects — overall the evidence conflicts and is inconclusive.

SourceSaumier et al., 2009 — PMC· conflictingHey et al., 2018 — PMC· conflicting
SourceSaumier et al., 2009 — PMCHey et al., 2018 — PMC

How it works

Homotaurine binds to amyloid-beta peptides, which are involved in Alzheimer's pathology, and was originally proposed to interfere with amyloid plaque formation. A pivotal Phase III Alzheimer's trial did not meet its primary endpoints, ending its development as a prescription medication. Following the failed drug development, homotaurine entered the supplement market in some countries. Smaller subsequent studies have looked at cognitive endpoints, but the supplement form does not have the same regulatory standing as an approved drug.

How to take it

1. Typical dose
100–150 mg twice daily (study dosing)
2. Timing
Twice daily, as used in studies
3. With food
With food
4. How long to try
Months if trialing; benefit is uncertain

What to track

Subjective memory or cognition
Nausea, dizziness, or headache
Any input from a clinician monitoring cognition

1 commercial form

Compare the main delivery options and what they’re best suited for.

Homotaurine (tramiprosate)

Sold as a cognitive-support supplement in some markets.

Small molecule with reasonable oral absorption.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

NauseaDizzinessHeadache

Who should avoid it

  • Pregnant or breastfeeding women
  • People on multiple cognitive or psychiatric medications without clinician guidance

Pregnancy & breastfeeding

Avoid due to insufficient safety data.

Interactions

Sedatives and CNS-acting medicationsMinor

Theoretical CNS interactions based on mechanism; not clearly established.

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

Clear homotaurine dose per serving
Reputable manufacturer with purity testing

Be skeptical of…

Claims of preventing or treating Alzheimer's disease
Implying drug-level efficacy from the failed trial

Frequently asked questions

Will homotaurine prevent Alzheimer's?⌄

No. The pivotal Alzheimer's trial did not show benefit, and the supplement is not a proven preventive treatment.

Is it the same as taurine?⌄

No. Homotaurine is a structural analog of taurine with one extra carbon. They have related but distinct biology, and homotaurine is not interchangeable with taurine.

References by claim

cognitive decline / alzheimer's disease

Saumier et al., 2009 — PMC (2009) link

Hey et al., 2018 — PMC (2018) link

Track Homotaurine with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.