The short version
- The 2023 Science paper reported that taurine supplementation increased lifespan in mice and worms and healthspan in monkeys, while the human data in it was correlational plus an acute rise after endurance exercise.
- A 2025 Science study from the National Institute on Aging found circulating taurine increased or stayed unchanged with age across three human cohorts, nonhuman primates and mice, measured longitudinally and cross-sectionally.
- An independent 2025 study of 137 men aged 20 to 93 found no association between circulating taurine and age, muscle mass, strength, physical performance or mitochondrial function.
- A 2025 meta-analysis of 34 randomised trials found taurine lowered fasting glucose by 5.90 mg/dL, HbA1c by 0.21% and systolic blood pressure by 4.38 mmHg, with 1.5 to 3.0g daily the more effective range.
- No human trial has tested whether taurine supplementation extends healthy life, and the 2023 paper's own authors called for such trials rather than reporting one.
In June 2023, Science published a paper titled "Taurine deficiency as a driver of aging." Within a week you could buy taurine capsules marketed on the strength of it. Almost none of that marketing told you which animals the lifespan results came from, and that omission is the whole article.
What the paper found, species by species
Singh and colleagues reported that circulating taurine concentrations decline with age in mice, monkeys and humans. Reversing that decline through supplementation increased both healthspan and lifespan in mice, and healthspan in monkeys. Mechanistically, taurine reduced cellular senescence, protected against telomerase deficiency, suppressed mitochondrial dysfunction, decreased DNA damage and attenuated inflammaging.
In humans, the paper reported that lower taurine concentrations correlated with several age-related diseases, and that taurine rose after acute endurance exercise. Those are associations and an acute response. They are not an intervention.
The authors were careful about this. Their own summary says taurine deficiency may be a driver of aging because its reversal increases healthspan in worms, rodents and primates and lifespan in worms and rodents, and that clinical trials in humans seem warranted. Read that sentence again: they are explicitly asking for the human study to be done, not reporting one.
Then two teams checked the human premise
The entire hypothesis rests on a single factual claim about people — that taurine falls as you age. If it does not, there is no deficiency to correct.
In June 2025, again in Science, Fernandez and colleagues at the National Institute on Aging looked. Across three geographically distinct human cohorts, plus nonhuman primates and mice, measured both longitudinally in the same individuals over time and cross-sectionally across ages, circulating taurine concentrations increased or stayed unchanged with age. They also found considerable variability in how taurine related to age-related changes in gross motor function and energy metabolism. Their conclusion: changes in circulating taurine are not a universal feature of aging.
Two months later, an independent group reached the same place from a different direction. Marcangeli and colleagues measured circulating taurine in 137 physically inactive and physically active men aged 20 to 93 and tested it against age, muscle mass, strength, physical performance and mitochondrial function. No association with any of them.
Two teams, different cohorts, different methods, same answer. That is not a quibble with the 2023 paper's mouse work — the mouse work may well stand. It is a failure of the bridge between the mouse work and you.
What taurine does have going for it
This is where we would be unfair if we stopped. Taurine has a real human evidence base; it is just not a longevity one.
A 2025 meta-analysis of 34 randomised controlled trials found taurine supplementation produced significant reductions in fasting blood glucose (−5.90 mg/dL), HbA1c (−0.21%), HOMA-IR (−0.57), triglycerides (−14.42 mg/dL), systolic blood pressure (−4.38 mmHg) and diastolic blood pressure (−2.54 mmHg), with 1.5 to 3.0g daily looking like the more effective range.
Those are modest, genuine, cardiometabolic effects in humans. They are also a completely different claim from extending your life, and a supplement sold on the second while resting on the first is being sold dishonestly.
The pattern to take away
This is the same shape as spermidine, where striking model-organism autophagy data and human epidemiology have not yet produced a convincing human trial. It is the same shape as most of this category. A mechanism is found in a short-lived organism, an epidemiological correlation is found in people, and the gap between them gets filled by marketing rather than by a trial.
The tell is always the species and the endpoint. If the lifespan number is from a mouse and the human data is a correlation, you are looking at a hypothesis. Biological age tests will not settle it for you either — they disagree with one another too much to referee a question this fine.
What we would actually tell you
We do not sell taurine and this article is not a setup for something we do sell. If you take it, take it for the cardiometabolic numbers, at 1.5 to 3g, and watch those numbers rather than a feeling. It appears well tolerated across those 34 trials.
If you were taking it because a 2023 headline said it slows aging, the two 2025 papers are your update, and the honest position is that the human case has weakened rather than strengthened. Meanwhile the money and the hour go further in the direction of VO2 max, where the human evidence is not in dispute.
Good questions
Does taurine actually slow aging in humans?
No human trial has tested that, and the premise it rested on has since failed replication twice. Two 2025 studies found circulating taurine either rises or stays flat with age in people, and one found no relationship with strength, muscle mass or physical performance. The lifespan results everyone quotes came from mice and worms.
Should I stop taking taurine?
That depends why you started. If it was the longevity headline, the evidence has moved against you and we would stop. If you take it for blood pressure or glucose, a 2025 meta-analysis of 34 randomised trials supports modest effects at 1.5 to 3g daily, and those are worth tracking with actual readings rather than a feeling.
Is taurine in energy drinks the same thing?
It is the same molecule, usually at around 1g per can, but the rest of the can is not neutral. You would be taking caffeine and often a large sugar load to get a dose you could buy on its own for pennies. If taurine is what you want, buy taurine. If caffeine is what you want, be honest that it is caffeine.
How much taurine is safe?
Across the 34 randomised trials in the 2025 meta-analysis, doses in the 1.5 to 3.0g per day range were used without safety signals being reported as a barrier. Long-term data in healthy people is thinner than the marketing implies. If you have kidney disease or are on blood pressure medication, clear it with your doctor first, because the blood pressure effect is real.
Was the 2023 taurine study wrong?
Not obviously, and we are not going to imply misconduct. Its animal work may well hold. What failed was the human premise built on top of it: two independent 2025 groups could not find the age-related decline in people that the deficiency hypothesis requires. That is ordinary science correcting itself, and it is why single-paper enthusiasm is a bad buying strategy.
What should I take instead for longevity?
Probably nothing, in the sense that nothing on any shelf has the evidence that training does. Cardiorespiratory fitness and resistance training have decades of human mortality data behind them and no capsule comes close. If you still want a supplement afterwards, buy it for a specific measurable reason and give it a defined window to prove itself.
Sources
- Singh P, Gollapalli K, Mangiola S, et al. Taurine deficiency as a driver of aging. Science, 2023. View study
- Fernandez ME, Bernier M, Price NL, et al. Is taurine an aging biomarker? Science, 2025. View study
- Marcangeli V, Cefis M, Hammad R, et al. Experimental Evidence Against Taurine Deficiency as a Driver of Aging in Humans. Aging Cell, 2025. View study
- Nie Z, Liu Y, Zhang M, et al. Effects of Oral Taurine Supplementation on Cardiometabolic Risk Factors: A Meta-analysis and Systematic Review of Randomized Clinical Trials. Nutr Rev, 2025. View study
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
