Taurine
Summary
A single 1–6 g serving of taurine gave small-to-moderate gains in exercise performance in pooled trials, though certainty was low. Trials lasting weeks found modest drops in blood pressure, fasting glucose and triglycerides, with no effect on cognition. Supplemental intakes up to 3 g/day have the strongest human safety data.
Key facts
- Capsule and beverage forms both appeared effective in a meta-analysis of single-dose trials (C)[1]
- Single-dose exercise performance ↑ small-moderate (C); blood pressure, fasting glucose and triglycerides ↓ (B); cognitive scores: no effect (C)[1][3][6]
- A 2008 risk assessment found strong evidence of no adverse effects at supplemental intakes up to 3 g/day (observed safe level); no official UL exists[8]
- 4 graded human outcomes on this page
- October 8, 2026
How it works
ProposedTaurine is credited with roles in glucose and lipid metabolism and blood-pressure regulation, attributed to cytoprotective, antioxidant and anti-inflammatory actions, with promising data mainly from animal studies and inconsistent human results (proposed). How it might aid exercise is not established; reviewers describe neuromodulatory and metabolic effects (proposed).[9][7]
What the human research says
Human trials only, one row per outcome. The form column shows what each trial actually tested. Grades follow our evidence-grading policy.
At a glance: strongest evidence per outcome
| Outcome | Grade | Effect | Strongest evidence | Rows |
|---|---|---|---|---|
| Metabolic | Grade B | Worsened | Meta-analysis · n = 1,024 · 2024 | 2 rows |
| Focus | Grade C | No effect | Meta-analysis · n = 402 · 2025 | 1 row |
| Performance | Grade C | Improved | Meta-analysis · n = 308 · 2025 | 1 row |
Every graded row
| Outcome | Effect | Grade | Best evidence | PMID |
|---|---|---|---|---|
| Blood pressure, fasting glucose and triglycerides | Worsened | Grade B | Meta-analysis · n = 1,024 · 2024 Participants in 25 randomized controlled trials Form: taurine · Dose: 0.5 to 6 g/day · Duration: 5 to 365 days Taurine lowered systolic blood pressure by about 4 mmHg, diastolic by about 1.5 mmHg, fasting glucose by about 5.9 mg/dL and triglycerides by about 18 mg/dL versus control; HDL cholesterol did not change. No significant adverse effects versus control. | 38755142 (opens PubMed)Source [3] |
| Cognitive test scores | No effect | Grade C | Meta-analysis · n = 402 · 2025 Cognitively impaired and non-impaired people in 7 randomized controlled trials Form: taurine, alone or with exercise training · Dose: Varied across trials · Duration: Varied across trials Taurine alone or with exercise did not significantly change cognitive scores. Combined with therapeutic drugs, it improved one test (MMSE) in a subgroup, but not cognitive performance overall. | 40320621 (opens PubMed)Source [6] |
| Exercise performance after a single dose | Improved | Grade C | Meta-analysis · n = 308 · 2025 Participants in 23 randomized trials Form: taurine capsules or beverages · Dose: Commonly 1–6 g · Duration: Single dose Taurine was linked to small-to-moderate improvements in overall performance (g = 0.25), more clearly in males and in endurance, strength/power and agility tasks. No dose-response was seen within 1–6 g. GRADE certainty was low to very low. | 40852891 (opens PubMed)Source [1] |
| Blood-sugar markers (HbA1c, fasting glucose, HOMA-IR) | Worsened | Grade C | Meta-analysis · n = 209 · 2022 Patients with diabetes in 5 randomized controlled trials Form: taurine · Dose: Varied across trials · Duration: Varied across trials Taurine reduced HbA1c (SMD -0.41), fasting blood sugar and HOMA-IR in patients with diabetes, with no significant effect on serum lipids, blood pressure or body composition. | 35769396 (opens PubMed)Source [5] |
Forms
| Form | Elemental % | Absorption (human data) | GI tolerance | Studied for |
|---|---|---|---|---|
| Taurine powder or capsules | 100%[1] | No head-to-head absorption data in our sources; capsule trials showed small performance gains.[1] | Strong evidence of no adverse effects up to 3 g/day in human trials (2008 risk assessment).[8] | Exercise and metabolic trials |
| Taurine in drinks (often with caffeine) | Varies[1] | Beverage formulations also appeared effective in single-dose exercise trials.[1] | Products that also contain caffeine add caffeine's side effects; no taurine-specific data in our sources.[7] | Single-dose performance; caffeine-plus-taurine combinations |
Compound weight → elemental active
500 mg taurine powder or capsules ≈ 500 mg elemental active
Studied doses
Doses studied in human trials ranged from 0.5 to 6 g of taurine a day, from single servings before exercise up to a year in metabolic trials. Intakes up to 3 g/day have the strongest evidence of safety.[1][3][8]
Interactions
Published interactions only: each row cites a source. No row means none was found in our sources, not that a combination is safe.
Other supplements
- CaffeineReviewIn a network meta-analysis of 12 studies, caffeine plus taurine improved anaerobic capacity and reaction time more than either alone; effects on endurance and heart rate varied.[7]
Who should be careful
- Higher intakes
- A 2008 risk assessment found strong evidence of no adverse effects at supplemental intakes up to 3 g/day; higher intakes have been studied in less depth. No official upper limit has been set.[8]
- Glucose- or blood-pressure-lowering medicines
- Trials found taurine can lower fasting glucose and blood pressure modestly; anyone using medicines for these should check with their clinician before adding it.[3][5]
- Before you start
- Talk to your pharmacist or clinician before adding this supplement, especially if you take prescription medicines, are pregnant or breastfeeding, or have a chronic health condition.[8]
Talk to your pharmacist or clinician before starting a supplement, especially if you take prescription medicines.
Articles about Taurine
Plain-English answers to common questions, built on the evidence above.
Frequently asked questions
Does taurine improve exercise performance?
Pooled single-dose trials found small-to-moderate gains (g = 0.25), most clearly in endurance, strength/power and agility tasks, but the certainty of evidence was rated low to very low and results did not always hold in sensitivity analyses.[1]
How much taurine was studied?
Exercise trials used 1–6 g, often about an hour before exercise, with no clear dose-response in that range. Metabolic trials used 0.5–6 g/day; one analysis found 1.5–3.0 g/day more effective.[1][3][4]
Is taurine in energy drinks safe?
A 2008 risk assessment found strong evidence of no adverse effects from supplemental taurine up to 3 g/day. Energy drinks also contain caffeine, which has its own limits.[8]
Does taurine affect blood pressure or blood sugar?
A meta-analysis of 25 trials (1,024 people) found modest reductions in blood pressure, fasting glucose and triglycerides, but no change in HDL cholesterol.[3]
Does taurine help memory or focus?
A 2025 meta-analysis of 7 trials (402 people) found no significant effect on cognitive scores.[6]
Sources
- [1]Does One Shot Work? The Acute Impact of a Single Taurine Dose on Exercise Performance: A Meta-Analytic Review.. Scand J Med Sci Sports, 2025. meta-analysis
- [2]The Effects of an Oral Taurine Dose and Supplementation Period on Endurance Exercise Performance in Humans: A Meta-Analysis.. Sports Med, 2018. meta-analysis
- [3]Taurine reduces the risk for metabolic syndrome: a systematic review and meta-analysis of randomized controlled trials.. Nutr Diabetes, 2024. meta-analysis
- [4]Effects of Oral Taurine Supplementation on Cardiometabolic Risk Factors: A Meta-analysis and Systematic Review of Randomized Clinical Trials.. Nutr Rev, 2026. meta-analysis
- [5]The effects of taurine supplementation on diabetes mellitus in humans: A systematic review and meta-analysis.. Food Chem (Oxf), 2022. meta-analysis
- [6]Effects of taurine supplementation on cognitive function: a systematic review and meta-analysis of randomised controlled trials.. Int J Food Sci Nutr, 2025. meta-analysis
- [7]Caffeine and taurine: a systematic review and network meta-analysis of their individual and combined effects on physical capacity, cognitive function, and physiological markers.. J Int Soc Sports Nutr, 2025. meta-analysis
- [8]Risk assessment for the amino acids taurine, L-glutamine and L-arginine.. Regul Toxicol Pharmacol, 2008. review
- [9]The effects of taurine supplementation on obesity, blood pressure and lipid profile: A meta-analysis of randomized controlled trials.. Eur J Pharmacol, 2020. meta-analysis
What changed
- First draft. Every evidence-row PMID checked with NCBI E-utilities (esummary + efetch abstract) and re-read in an independent adversarial pass.