The Shocking Truth About Taurine and Arterial Plaque (New Evidence)
In a Nutshell
A 2024 meta-analysis of human trials shows 1.5–3 g daily taurine modestly lowers systolic blood pressure (~4 mmHg), triglycerides (~18 mg/dL), fasting glucose (~6 mg/dL), and insulin, but no human study has yet measured actual arterial plaque or heart-attack prevention. All seven proposed anti-plaque mechanisms come from animal or cell data, and a 2025 study found leukemia cells in mice use taurine as fuel, tripling death risk in already-sick animals. Vegetarians or people with hypertension, high triglycerides, or insulin resistance may add 1.5–3 g taurine as a low-cost adjunct, but lifestyle and direct plaque imaging (CIMT/CTA) remain the primary tools; those with leukemia, MDS, kidney failure, or on multiple antihypertensives or antiplatelets should avoid it.
These notes were generated by AI and may contain inaccuracies.
Taurine has become one of the most popular dietary supplements today. People claim that it lowers blood pressure, cleanses the arteries, strengthens a weak heart, and even slows down aging. A new review published in the journal Nutrition examined the evidence regarding taurine and heart disease.
Dr. Ford Brewer, a preventive medicine physician with over 40 years of clinical experience and former director of the Hopkins program teaching physicians preventive medicine, explains what taurine is, what it really does in the body, what new evidence says about taurine and heart disease, and offers personal thoughts on whether to take it and in what quantity.
Taurine is an amino acid, a building block of proteins, but it is a strange amino acid. Most amino acids are built to form protein, but taurine swims freely inside cells. The body carries a lot of it in the heart, muscles, retina, and platelets. The liver produces some taurine from other amino acids. The rest comes from food, mostly fish, shellfish, and meat. Vegetarians consume very little taurine and rely entirely on their bodies to produce it. Taurine is also an ingredient printed on energy drink cans.
Taurine performs basic cleaning tasks. It helps cells manage water and calcium. The liver binds taurine to bile acids, which is one way the body gets rid of cholesterol. Taurine helps keep mitochondria functioning cleanly. The kidneys excrete taurine very quickly, which is why it is difficult to raise blood levels significantly.
The review comes from South China University. Concerns exist about the quality of research published in China. The review outlines seven different ways taurine may slow down plaque buildup.
- Taurine activates the enzyme that converts cholesterol into bile acids and switches off the switch that makes new fats.
- In the artery wall, taurine raises nitric oxide, which relaxes blood vessels and lowers blood pressure.
- Taurine protects the membranous lining of arteries and reduces sticky molecules that allow white blood cells to infiltrate the wall and begin forming plaques.
- Inside cells, taurine reduces harmful oxygen byproducts known as oxidative stress.
- Taurine slows down muscle cell reproduction and transformation into something resembling bone in artery walls, keeping walls thin, flexible, and healthy.
- In the intestines, taurine pushes gut bacteria in a healthier direction.
- Platelets carry taurine at a concentration approximately 440 times higher than blood. In laboratory tests, taurine made platelets less sticky and made aspirin work better.
Almost all seven mechanisms come from laboratory animals: rats, mice, rabbits, quail, or cells in a dish (in vitro research). Every instance of plaque reduction occurred in animals. This is a narrative review where authors chose studies without formal research or assessment of evidence strength. It is not a Cochrane study. No one has proven these effects last for more than 6 months. The authors envision an experiment using calcium scores and carotid ultrasound over a whole year, but this experiment has not been carried out.
A man in his late sixties read that taurine cleanses arteries and thought he could stop worrying about his slightly high blood sugar. He was reading mechanisms and assuming results would follow theoretical mechanisms.
The best human data come from two 2024 meta-analyses by a group led by Zhang, Z-H-E-N-G. The first study compiled 25 trials involving about 1,000 people consuming between 0.5 grams and 6 grams of taurine daily compared to placebo. Results included:
- Systolic blood pressure reduced by about 4 points
- Diastolic blood pressure reduced by about 1.5 points
- Fasting blood sugar decreased by about 6 points
- Fasting insulin decreased
- Triglycerides decreased by about 18 points
- LDL (bad cholesterol) decreased by about 6.5 points
HDL (good cholesterol) and weight did not change. The reduction in triglycerides is three times greater than the reduction in bad cholesterol. Taurine affects metabolic factors: insulin resistance, triglycerides, and blood pressure, which contribute to plaque formation.
Most cases of prediabetes are never recorded in medical records. Studies show the probability of going to a doctor in the United States with a metabolic disease, receiving a diagnosis and treatment, and having it recorded is no more than 5%. Metabolic diseases like prediabetes and diabetes are overlooked.
A better triglyceride number does not indicate whether plaques are forming. The recommendation is to examine, not guess. Look for plaques in underlying metabolic risks, not just a single indicator like taurine level or triglyceride level.
No experiments have measured whether taurine prevents heart attacks. No one knows if taurine reduces plaque in humans because no carotid ultrasound, CT angiography, or reliable studies have tested this. Taurine has shown plaque stability in mice and quail, but not tested in humans. Evidence is not conclusive that taurine treats arteries, but it moderately improves factors leading to plaque formation.
In a 2016 12-week trial published in Hypertension, 120 people with mildly elevated blood pressure took 1.6 grams of taurine daily. Taurine reduced clinical blood pressure by 4.6 points systolic and 3.4 points diastolic compared to placebo, and improved arterial lining efficiency. A 2025 trial in people with type 2 diabetes found better vasodilation and less arterial stiffness after 12 weeks.
In a trial of 120 people with diabetes, taurine reduced fasting insulin levels and insulin resistance but fasting blood sugar and A1C levels did not improve enough to outperform placebo. Another small trial in diabetic patients found a decrease in C-reactive protein (CRP), a sign of inflammation.
Taurine is found in high concentrations in heart muscle. The strongest evidence regarding the heart comes from cats. In 1987, University of California, Davis researchers published in Science that cats with large, weak, failing hearts had low taurine levels. When cats received taurine, their heart failure subsided. Cats cannot produce much taurine on their own. Commercial cat food lacked taurine, so pet food companies added it, and a common type of heart failure in cats mostly disappeared.
According to a 2018 review, Japan approved taurine for congestive heart failure treatment. In pooled human trials, those with heart failure gained about 5 points in cardiac pumping fraction. These are small experiments, and the cat story relates to heart muscle deficiency in an animal that cannot produce taurine on its own.
A 2023 Science paper showed taurine increased mouse lifespan by 10 to 12%, and claimed blood taurine levels decline sharply with age. In 2025, a National Institutes of Health team tested this claim on three groups of humans and found taurine levels often remained stable or even increased with age. The mouse result stands, but the idea that everyone over fifty suffers from taurine deficiency does not appear true when tested on humans.
A 2025 Nature paper showed leukemia cells in mice absorb taurine and use it as fuel for growth. In mice already infected with leukemia, taurine supplements nearly tripled the likelihood of death. This work was on already-sick mice and has been criticized. It is not a human research paper and says nothing about whether taurine affects human conditions. People with myeloid blood cancer such as leukemia, history of leukemia, or pre-existing conditions like myelodysplastic syndrome (MDS) should stay away from taurine until more data are available.
Taurine is eliminated by the kidneys, so caution is advised for those with kidney failure. Taurine lowers blood pressure, so those already taking two or three blood pressure medications should beware of dizziness or further blood pressure drops, especially when standing. Taurine makes platelets less sticky, so those taking aspirin, clopidogrel, or other blood thinners should consult their prescriber before taking large amounts of taurine. In trials, side effects were similar to placebo and mostly involved stomach upsets.
Taurine is a sensible addition for those with high blood pressure, high triglycerides, insulin resistance, or metabolic disorders, especially if they do not eat much fish or meat. Vegetarians should consider taurine, especially if they have metabolic diseases, which applies to most people over forty. The recommended dose is 1.5 to 3 grams daily, but as a supplement alongside reducing refined carbohydrates, exercise, and good sleep, never as a substitute for essential pillars of health care.
The best blood pressure trial used 1.6 grams, and 3 grams is the level a major safety review proved safe. A 4-point blood pressure drop and 18-point triglyceride drop are worthwhile results, but more benefit comes from diet and exercise management. Taurine can be helpful but should not be the foundation. Lifestyle is the plan.
Taurine cannot reveal what is happening inside arteries; only measurement can. Those taking supplements without knowing if soft plaque is building up in arteries need direct artery wall measurement using CIMT scanning or CTA imaging with AI plaque analysis. Glucose tolerance testing along with insulin and inflammation screening identifies root causes of problems.
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