4-Hydroxybutyric Acid.
Research-backed compound with potential health benefits. Illicitly, it's a dangerous club drug known for causing euphoria, disinhibition, and amnesia.
Reviewed March 2026
- Category
- Compound
What 4-Hydroxybutyric Acid is, and what it does.
- Does it work
- As a supplement? Absolutely not. It is a controlled substance with a high potential for abuse and harm. For medically-diagnosed narcolepsy, it can be life-changing under a doctor's care.
- How much to take
- Prescribed by a doctor only. Dosing is precise, starting around 4.5 grams per night, split into two doses. Self-dosing is a gamble with your life.
- Time to feel it
- Under medical supervision a dose acts within about 15 to 30 minutes. It's a controlled medicine rather than a supplement ingredient, so no daily supplement timeline applies.
- The first dose
- A rapid and profound wave of sleep within 15-30 minutes of a prescribed dose. You will be unconscious.
- With regular use
- For narcolepsy patients: dramatic improvement in daytime alertness. For illicit users: high risk of severe addiction, neurological damage, and death.
- How well tolerated
- Outside of a strict medical setting, it is not safe.
- How it feels
- A powerful CNS depressant. It feels like an unstoppable urge to sleep. Not a gentle calming agent, but a heavy sedative switch.
- The overlooked benefit
- Your own brain makes small amounts of it from GABA, and clearance runs it back into the citric acid cycle, so it turns up in normal human tissue at low levels.
250 to 500mg a day is where 4-Hydroxybutyric Acid works.
Source: Pharmacological references for GHB analogs
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.
4-Hydroxybutyric Acid 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.
- Night-time sleep consolidation under medical supervisionRandomised trial
- Endogenous formation from GABA by way of succinic semialdehydeNarrative review
- Agonism at GABA-B receptors at exogenous concentrationsIn vitro study
- Capacity-limited elimination that stretches duration as dose risesNarrative review
Questions people ask about 4-Hydroxybutyric Acid.
- Can I buy GHB supplements?
- No. Anything sold online as 'GHB' is an illegal drug, likely made in a clandestine lab with dangerous impurities. Don't do it.
- What's the biggest danger?
- Mixing it with alcohol or other sedatives. It's a common cause of fatal overdose. Your breathing just stops.
- Is it addictive?
- Yes, highly. Physical dependence can develop quickly, and withdrawal can cause seizures and delirium, requiring hospitalization.
- Why is it known as a 'date rape' drug?
- Because it's fast-acting, colorless, odorless, and can easily render someone unconscious and cause amnesia.
- What about precursors like GBL or 1,4-BDO?
- These are industrial solvents that your body converts into GHB. They are just as dangerous, if not more so, due to unpredictable conversion rates.
- Is it the same as GABA?
- No. It's a metabolite of GABA, but it crosses the blood-brain barrier much more effectively. It is vastly more powerful and dangerous.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
GABA is the parent compound: it is transaminated to succinic semialdehyde, a fraction of which is reduced to 4-hydroxybutyric acid. The compound then acts back at GABA-B receptors as well as at its own high-affinity binding site. The relationship runs in both directions and is metabolic as well as receptor-level.
Anything acting on GABAergic tone adds to the central depressant effect of a GABA-B agonist rather than replacing it. This is flagged as a caution, not as a useful combination. Additive sedation is the direction of the interaction.
Theanine's central effect is mild on its own, but additivity with a strong central depressant is the direction of the interaction and not the opposite. The magnitude is not established. Flagged rather than recommended.
Nothing specific on file for 4-Hydroxybutyric Acid. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What 4-Hydroxybutyric Acid actually does.
4-hydroxybutyric acid, also written as gamma-hydroxybutyric acid, is an endogenous compound formed from GABA by way of succinic semialdehyde, which a cytosolic reductase converts to 4-hydroxybutyrate.
It is cleared by oxidation back to succinic semialdehyde and then to succinate, which enters the citric acid cycle, so the compound is ultimately metabolised to carbon dioxide and water.
It acts as an agonist at GABA-B receptors at the concentrations reached after an exogenous dose, and binds a separate high-affinity site at the lower concentrations found endogenously.
Its elimination is capacity-limited rather than first order, so the duration of effect rises disproportionately as the dose rises.
Where 4-Hydroxybutyric Acid comes from.
It is made by opening the ring of a common industrial solvent with lye. Medicine-grade material is then purified and tested to a filed standard. Material made outside that chain has been through the same reaction with none of the checks, so what else is in it is unknown.
Chemically synthesised. The molecule is identical to the one a plant or an animal makes, and building it deliberately means a known purity, a fixed dose and no crop contaminants. For several nutrients this is the only route that reaches a usable amount.
The commercial route starts from gamma-butyrolactone, an industrial solvent produced at scale from 1,4-butanediol or from maleic anhydride hydrogenation.
The lactone ring is opened by aqueous sodium hydroxide, which gives the sodium carboxylate directly. The reaction is exothermic and the stoichiometry determines whether unreacted lactone or excess alkali remains.
Pharmaceutical manufacture crystallises the salt and controls residual gamma-butyrolactone, sodium hydroxide and process solvents to specified limits under GMP.
Content is assayed and the impurity profile characterised against a pharmacopoeial or filed specification before release.
The pharmaceutical product is a buffered aqueous oral solution filled and dispensed under a restricted distribution programme.
Getting 4-Hydroxybutyric Acid from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
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.