Taurine
An amino acid the body makes, best known for exercise and blood pressure.
- Exercise and endurance
- Blood pressure
- Blood sugar and cholesterol
- Antioxidants and inflammation
- Memory and focus
- Muscle cramps
A plain-English overview, not advice. Written from published reviews and trials and from what people say in public forums.
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On this page
What is taurine?
Taurine is a sulphur-containing amino acid that the body makes for itself and also picks up from food, and it gathers where tissues work hardest: the heart, brain, retina and skeletal muscle. It is usually called semi-essential, because the body makes only a limited amount, so what arrives from outside adds to the total. Little was understood about it until the 1990s; interest has grown quickly since. On a UK shelf it is plain taurine, in capsules or stirred into a drink, with no competing chemical forms to weigh up.
Why do people take taurine?
Exercise and endurance
The thinking. Skeletal muscle holds a great deal of taurine, and it has a hand in how muscle manages energy, water and the calcium behind each contraction. The thinking is that a dose beforehand tops up what working muscle draws on, so a hard effort lasts longer. It is the oldest reason people take it, and still the commonest.
What research has found. Reviews pooling randomised trials measured endurance, time to exhaustion, strength and sprint tests, and mostly found small improvements over placebo across doses of one to six grams; a single dose did about as much as days of taking it. One trial measured less soreness after a hard session. A fair body of trials has looked at this, and most point the same way.
Blood pressure
The thinking. Taurine is concentrated in the heart and in the lining of blood vessels. Work alongside one trial found it raised the enzymes that make hydrogen sulphide, a gas that lets vessel walls relax, and damped the calcium flow that tightens them. The idea is that a relaxed vessel carries blood at a lower pressure.
What research has found. Three pooled analyses measured resting blood pressure and found average falls of roughly three to five points systolic and one to three diastolic, the largest covering just over a thousand people. A twelve-week trial in 120 adults whose readings sat in the high-normal range measured falls in both clinic and 24-hour readings. This is one of the best-studied uses, and several reviews of trials broadly agree.
Blood sugar and cholesterol
The thinking. Taurine has a hand in how muscle, liver and fat tissue handle fuel. The thinking is that a body making steadier use of its fuel holds steadier blood sugar and carries less fat in the blood. It is a reason that tends to arrive with a set of test results.
What research has found. Two recent pooled analyses of randomised trials measured fasting blood sugar, insulin resistance, triglycerides and cholesterol and found small average reductions; the larger pointed to one and a half to three grams a day, over at least eight weeks, as the clearest range. A trial in 45 adults with type 2 diabetes measured the same pattern. Research here is still young: a few studies so far, mostly pointing the same way.
Antioxidants and inflammation
The thinking. Taurine is busy inside mitochondria, the compartments of a cell that turn fuel into energy, where reviews describe it as steadying the process and mopping up the reactive by-products it throws off. The thinking is that less of that everyday wear shows as lower readings on blood markers of inflammation and oxidation. People thinking about how they are ageing often pick it up for this.
What research has found. Two pooled analyses and three small trials measured markers such as C-reactive protein and an antioxidant enzyme, and most found lower readings than placebo; one review found no change in two inflammatory signals. Those taking part were mainly women carrying extra weight and adults with heart failure. A reasonable number of trials have measured this, and most of them agree.
Memory and focus
The thinking. The brain keeps its own store of taurine, where it has a part in the water and calcium balance of nerve cells and in the calming side of nerve signalling. The thinking is that topping that store up makes for steadier attention and a sharper memory. It is a newer and more tentative reason people take it.
What research has found. A pooled analysis of seven randomised trials in just over four hundred people measured memory, attention and general cognitive scores and found no clear difference from placebo. A trial in women in their eighties pointed the same way: scores rose only in the group that combined taurine with exercise classes. There is a decent body of trial evidence behind this, mostly pointing one way.
Muscle cramps
The thinking. Taurine sits in the muscle membrane and has a part in how readily it fires and how calcium moves inside the fibre, which is the machinery a cramp runs on. The thinking is that topping it up makes a muscle slower to seize on its own. Cramps are an everyday complaint people reach for a supplement about.
What research has found. One randomised crossover trial in thirty adults with long-term liver disease, all with three or more cramps a week, compared four weeks on two grams a day with four weeks on placebo, and recorded fewer, shorter and milder cramps on taurine. Few studies have measured this yet, so there is little to go on either way.
What does taurine do in the body?
Taurine is an amino acid that sits in its free form inside cells, most of all where tissues work hardest. Its jobs are housekeeping ones: steadying cell membranes, holding the balance of water and salts inside a cell, and helping manage the calcium that switches muscle and nerve activity on and off.
It also has a role in energy metabolism, in muscle, liver and fat tissue alike, and a particular one inside mitochondria, the compartments that turn fuel into usable energy; reviews describe it as keeping that machinery running cleanly and absorbing some of the reactive by-products it throws off. The body makes taurine itself, but only a limited amount, so what comes in from food and supplements adds to the total. In trials, blood levels rose within a fortnight or two of starting.
What do people say about taking taurine?
These are anecdotes people have shared, not evidence.
What people like
- Feeling calmer and sleeping more easily is the commonest good report, often noticed within the first couple of nights.
- A few describe clearer thinking after months at higher daily amounts, sometimes taken alongside a B vitamin for brain fog.
- Some say they tolerated large daily amounts for long stretches with nothing to report, and stopped once the reason had passed.
- A minority who pair it with magnesium describe calm and steady energy together, rather than one at the other’s expense.
Common complaints
- Disturbed sleep is much the commonest complaint, several describing sharp insomnia even when they took it first thing.
- A handful report chest tightness, harder breathing or a fluttering heart after taking it several days running.
- Occasional reports of dips that felt like low blood sugar, and of only being able to manage a small evening dose.
- Some notice nothing at all, describing it as neither calming nor energising however long they stayed on it.
How people take it
- Most take between 500 mg and 3 g a day, very commonly as 500 mg capsules split across meals.
- A minority go higher, to around 4 g a day, and take it in divided doses rather than all at once.
- Evening dosing is common among those taking it to wind down, though some who lost sleep found mornings no better.
- Magnesium is by far the commonest thing people pair it with; potassium and a B vitamin come up next.
Read from these public discussions:
- Taurine (Mumsnet, 2023)
- Supplements (Mumsnet, 2024)
- Taurine - energyzing or calming amino acid? (Phoenix Rising forums, 2016)
- Taurine: Another Deadlock Nutrient? (Phoenix Rising forums, 2015)
- Taurine confusion! (Phoenix Rising forums, 2014)
What forms of taurine are there?
| Form | What’s different | Per serving, on products we list |
|---|---|---|
| Taurine | Plain taurine, the amino acid itself; trials have used it as capsules and stirred into a drink. | 500 mg to 1.2 g |
What else is worth knowing about taurine?
- Trials used between half a gram and six grams a day, for five days to a year; reviews found one and a half to three grams the range where differences showed clearest.
- Where trials reported on side effects, they recorded none that differed from placebo, including the blood pressure reviews and the cramp trial.
- Labels give taurine per serving, and a serving is sometimes more than one capsule, so the front figure is not always one capsule’s worth.
- Who took part varies: adults with type 2 diabetes or extra weight, women in their sixties and eighties, adults with heart failure and athletes. The exercise trials were mostly small.
If you take medication, are pregnant, or have a health condition, check with a pharmacist or GP first.
The research behind this page (28 studies)
- Does One Shot Work? The Acute Impact of a Single Taurine Dose on Exercise Performance: A Meta-Analytic Review. (2025, meta-analysis)
- Caffeine and taurine: a systematic review and network meta-analysis of their individual and combined effects on physical capacity, cognitive function, and physiological markers. (2025, systematic review)
- The Dose Response of Taurine on Aerobic and Strength Exercises: A Systematic Review. (2021, systematic review)
- The Effects of an Oral Taurine Dose and Supplementation Period on Endurance Exercise Performance in Humans: A Meta-Analysis. (2018, meta-analysis)
- Effects of Caffeine-Taurine Co-Ingestion on Endurance Cycling Performance in High Temperature and Humidity Environments. (2024, randomised trial)
- Does Single or Combined Caffeine and Taurine Supplementation Improve Athletic and Cognitive Performance without Affecting Fatigue Level in Elite Boxers? A Double-Blind, Placebo-Controlled Study. (2022, randomised trial)
- Effects of taurine supplementation following eccentric exercise in young adults. (2014, randomised trial)
- Taurine reduces the risk for metabolic syndrome: a systematic review and meta-analysis of randomized controlled trials. (2024, meta-analysis)
- The effects of taurine supplementation on obesity, blood pressure and lipid profile: A meta-analysis of randomized controlled trials. (2020, meta-analysis)
- The Effects of Oral Taurine on Resting Blood Pressure in Humans: a Meta-Analysis. (2018, meta-analysis)
- Taurine Supplementation Lowers Blood Pressure and Improves Vascular Function in Prehypertension: Randomized, Double-Blind, Placebo-Controlled Study. (2016, randomised trial)
- Effects of Oral Taurine Supplementation on Cardiometabolic Risk Factors: A Meta-analysis and Systematic Review of Randomized Clinical Trials. (2026, meta-analysis)
- Effect of Long-Term Taurine Supplementation on the Lipid and Glycaemic Profile in Adults with Overweight or Obesity: A Systematic Review and Meta-Analysis. (2024, meta-analysis)
- The effects of taurine supplementation on glycemic control and serum lipid profile in patients with type 2 diabetes: a randomized, double-blind, placebo-controlled trial. (2020, randomised trial)
- Taurine supplementation as a therapeutic strategy for cellular senescence and chronic inflammation in long COVID: a systematic review and meta-analysis. (2026, meta-analysis)
- Profiling inflammatory and oxidative stress biomarkers following taurine supplementation: a systematic review and dose-response meta-analysis of controlled trials. (2022, meta-analysis)
- Taurine as a possible antiaging therapy: A controlled clinical trial on taurine antioxidant activity in women ages 55 to 70. (2022, randomised trial)
- Taurine supplementation has anti-atherogenic and anti-inflammatory effects before and after incremental exercise in heart failure. (2017, randomised trial)
- Oxidative stress and inflammation in obesity after taurine supplementation: a double-blind, placebo-controlled study. (2014, randomised trial)
- Effects of taurine supplementation on cognitive function: a systematic review and meta-analysis of randomised controlled trials. (2025, meta-analysis)
- Exercise and taurine in inflammation, cognition, and peripheral markers of blood-brain barrier integrity in older women. (2018, randomised trial)
- Randomised clinical trial: oral taurine supplementation versus placebo reduces muscle cramps in patients with chronic liver disease. (2018, randomised trial)
- The Role of Taurine in Mitochondria Health: More Than Just an Antioxidant. (2021, review)
- Functional Role of Taurine in Aging and Cardiovascular Health: An Updated Overview. (2023, review)
- Taurine is Involved in Energy Metabolism in Muscles, Adipose Tissue, and the Liver. (2019, review)
- Taurine Supplementation as a Neuroprotective Strategy upon Brain Dysfunction in Metabolic Syndrome and Diabetes. (2022, review)
- Emergence of taurine as a therapeutic agent for neurological disorders. (2024, review)
- Taurine: the appeal of a safe amino acid for skeletal muscle disorders. (2015, review)
How much does taurine cost?
That depends on the form and the pack, so we work out the price of the same dose of every taurine product we can find and rank them.