Nootropic profile
Sulbutiamine
Sulbutiamine is a synthetic derivative of vitamin B1 (thiamine) that crosses the blood-brain barrier far more effectively than thiamine itself. It is used to combat mental fatigue, enhance motivation, improve memory, and support dopaminergic function.
Best for
Educational only: this is not medical advice. Always check with a qualified healthcare professional before starting any supplement.
What is Sulbutiamine?
Sulbutiamine is a synthetic lipophilic derivative of thiamine (vitamin B1), developed in Japan in the 1960s to address the widespread thiamine deficiency caused by a predominantly white rice diet.
What it does for you
Community and editorial ratings, out of 5:
How to take it
- Typical dose: 400–600 mg per day, divided into 2 doses
- Starting dose: 200 mg to assess tolerance
- For mental fatigue: 400 mg daily (the dose used in most clinical studies for asthenia)
- For cognitive enhancement: 400–600 mg daily
- Best taken: In the morning and early afternoon with food (fat-soluble compound)
Watch out for
- Side effects: Generally well-tolerated. Possible headache, nausea, insomnia, or skin rash at higher doses.
- Tolerance: Can develop with daily use. Cycling (5 days on, 2 off) helps maintain effectiveness.
- Mood effects: Some users report irritability or anxiety - this may be dose-dependent and related to dopaminergic upregulation.
- Drug interactions: Limited data. Use caution with dopaminergic medications or MAO inhibitors.
- Legal status: Prescription medication in France (Arcalion). Available as a dietary supplement in most other countries including the US and UK.
The science, if you're curious.
- Crosses the blood-brain barrier efficiently, raising thiamine triphosphate (ThTP) and thiamine pyrophosphate (TPP) levels in the brain - critical cofactors...
- Increases the density of D1 receptors in the prefrontal cortex, enhancing dopamine signalling related to motivation, decision-making, and reward.
- Potentiates cholinergic, dopaminergic, and glutamatergic transmission in the hippocampus, supporting memory encoding and retrieval.
- Improves cellular energy metabolism in the brain by optimising thiamine-dependent enzymatic reactions in the Krebs cycle and pentose phosphate pathway.
Where to find it
- Synthetic compound: Does not occur in nature - it is a laboratory-synthesised derivative of thiamine
- Supplements: Available as capsules and powder from nootropic vendors
- Brand name: Arcalion (prescription, primarily in France and parts of Asia)
Frequently asked
Sulbutiamine is a synthetic derivative of vitamin B1 (thiamine) that crosses the blood-brain barrier far more effectively than thiamine itself. It is used to combat mental fatigue, enhance motivation, improve memory, and support dopaminergic function.
The main benefits people report from Sulbutiamine are: Cognitive Enhancement, Energy, Focus, Memory, Mood, Motivation.
Typical dose: 400–600 mg per day, divided into 2 dosesStarting dose: 200 mg to assess toleranceFor mental fatigue: 400 mg daily (the dose used in most clinical studies for asthenia)For cognitive enhancement: 400–600 mg dailyBest taken: In the morning and early afternoon with food (fat-soluble compou...
Side effects: Generally well-tolerated. Possible headache, nausea, insomnia, or skin rash at higher doses.Tolerance: Can develop with daily use. Cycling (5 days on, 2 off) helps maintain effectiveness.Mood effects: Some users report irritability or anxiety - this may be dose-dependent and related to...
Crosses the blood-brain barrier efficiently, raising thiamine triphosphate (ThTP) and thiamine pyrophosphate (TPP) levels in the brain - critical cofactors...Increases the density of D1 receptors in the prefrontal cortex, enhancing dopamine signalling related to motivation, decision-making, and rewa...
Rate Sulbutiamine
Log in to leave an overall rating.
What people are saying
Log in to leave a comment.
No comments yet. Be the first to share your experience.