Taurine supplement: what the research shows
We research products from makers' specs and health sources; we do not run hands-on tests. Links to Amazon may earn us a commission at no cost to you. How this works.
- Taurine 1,000 mg capsules. Best for: Adults who want a simple taurine supplement. See options on Amazon
- Taurine 500 mg capsules. Best for: People who want a smaller dose. See options on Amazon
- Taurine powder. Best for: People who want gram doses. See options on Amazon
What taurine is
Taurine is an amino acid. A 2024 meta-analysis in Nutrition Journal describes possible cardiovascular benefits through calcium regulation, blood pressure reduction and antioxidant and anti-inflammatory effects. It is one of the two main active ingredients, with caffeine, in many commercial energy drinks, according to a 2025 review.
Supplements sell free-form taurine in capsules and powder. NOW Foods, for example, sells 500 mg and Double Strength 1,000 mg capsules.
What the research shows
| Outcome | Pooled effect |
|---|---|
| Heart rate | About 3.579 beats per minute lower |
| Systolic blood pressure | About 3.999 mmHg lower |
| Diastolic blood pressure | About 1.435 to 1.509 mmHg lower |
| Fasting blood sugar | About 5.882 mg/dL lower |
| Triglycerides | About 18.315 mg/dL lower |
Heart. The 2024 Nutrition Journal meta-analysis pooled 20 randomized trials with 808 participants and found significant reductions in heart rate, systolic and diastolic blood pressure, and better heart failure functional class scores.
Metabolic syndrome. A 2024 meta-analysis in Nutrition and Diabetes included 25 trials with 1,024 participants, using 0.5 to 6 g a day for 5 to 365 days. Taurine reduced systolic and diastolic blood pressure, fasting blood sugar and triglycerides compared with control.
These effects are small and come from varied trials. Taurine is not a replacement for blood pressure, diabetes or heart failure treatment.
Weight, blood sugar and brain
Overweight and obesity. A 2024 meta-analysis in Nutrients of 9 randomized trials found long-term taurine lowered triglycerides, total cholesterol and fasting insulin in adults with overweight or obesity. BMI improved by about 1.14 in overweight adults, while HbA1c and insulin resistance improved only in people with obesity. Taking 3 g a day long term lowered HbA1c by about 0.37% and fasting blood sugar by about 7.14 mg/dL.
Brain and mood. A 2026 systematic review in Foods of 8 trials with 244 healthy people found single doses of taurine, typically 1 to 3 g, produced at best small and inconsistent cognitive improvements, and most outcomes showed no effect. Trials pairing taurine with caffeine showed more reliable benefits but could not separate taurine's own effect.
Plant-based diets. The same review notes taurine and related sulfur amino acids come mainly from animal foods. None of the trials checked participants' usual diets or recruited people eating little animal food, so the effects of low taurine intake on plant-based diets are still unknown, and longer studies are needed.
Taurine, caffeine and exercise
A 2025 network meta-analysis in the Journal of the International Society of Sports Nutrition included 12 studies. Caffeine plus taurine had a credible positive effect on anaerobic capacity and reaction time compared with either alone. Caffeine alone most reduced perceived effort. Taurine showed a possible tendency to lower blood lactate, but effects on aerobic performance were variable.
Energy drinks also contain caffeine and other ingredients, so the effects of a can differ from a taurine capsule.
Safety
- Blood pressure. Because taurine can lower blood pressure, NOW Foods advises consulting a physician if you take blood pressure or diuretic medicines or have low blood pressure.
- Pregnancy. NOW Foods advises a physician check if pregnant or nursing.
- Energy drinks. Combined products add caffeine; count your total caffeine intake.
- Heart conditions. Use only with your cardiologist's guidance.
How to choose a taurine supplement
- Dose. NOW Foods' Double Strength gives 1,000 mg free-form taurine per capsule, taken 1 to 2 times daily with juice or water between meals. Studies used 0.5 to 6 g a day.
- Capsules or powder.
- Single ingredient. Choose taurine alone if you want to match the trials, rather than energy blends.
- Human products only. Choose products labeled for people, not pets.
- Check with your doctor if you have blood pressure, heart or kidney concerns.
What to look for when you buy
Taurine 1,000 mg capsules
Best for: Adults who want a simple taurine supplement
NOW Foods' Double Strength lists 1,000 mg free-form taurine per capsule, 1 to 2 times daily between meals.
Watch out: Can lower blood pressure. Ask your doctor if on blood pressure medicines or diuretics.
See options on AmazonTaurine 500 mg capsules
Best for: People who want a smaller dose
NOW Foods' regular strength has 500 mg per capsule, at the low end of studied doses.
Watch out: Same blood pressure cautions.
See options on AmazonTaurine powder
Best for: People who want gram doses
NOW Foods also sells taurine powder for measuring gram amounts.
Watch out: Measure carefully. Not for pets.
See options on AmazonQuestions people ask
- What is taurine good for?
- Meta-analyses show small reductions in heart rate, blood pressure, fasting blood sugar and triglycerides.
- Is taurine safe?
- Trials used 0.5 to 6 g a day. It can lower blood pressure, so check with a doctor if you take blood pressure medicines.
- Is taurine in energy drinks bad for you?
- Taurine itself showed modest benefits in trials. Energy drinks also contain caffeine and other ingredients, so count your total caffeine.
- How much taurine should I take?
- Follow the label. NOW Foods' 1,000 mg capsule is taken 1 to 2 times daily.
- Does taurine help exercise?
- Combined with caffeine, it improved anaerobic capacity and reaction time more than either alone in a 2025 analysis.
Sources
- Insights into the cardiovascular benefits of taurine: a systematic review and meta-analysis (pmc.ncbi.nlm.nih.gov), Nutrition Journal (PMC11325608)
- Taurine reduces the risk for metabolic syndrome: a systematic review and meta-analysis of randomized controlled trials (pmc.ncbi.nlm.nih.gov), Nutrition and Diabetes (PMC11099170)
- Effect of Long-Term Taurine Supplementation on the Lipid and Glycaemic Profile in Adults with Overweight or Obesity (pmc.ncbi.nlm.nih.gov), Nutrients (PMC11722866)
- Cognitive Effects of Taurine and Related Sulphur-Containing Amino Acids: A Systematic Review of Human Trials (pmc.ncbi.nlm.nih.gov), Foods (PMC12939648)
- Caffeine and taurine: a systematic review and network meta-analysis (pmc.ncbi.nlm.nih.gov), Journal of the International Society of Sports Nutrition (PMC12490369)
- Taurine, Double Strength 1000 mg Veg Capsules (www.nowfoods.com/products/supplements/taurine-double-strength-1000-mg-veg-capsules), NOW Foods