Podcast episode 67 (in German)
Taurine: the underrated amino acid fact-checked (solo special)
August 16, 2026
Taurine sounds like energy drinks, bulls and service stations. In fact it is one of the most abundant free amino acids in the body — and since 2023 the lead in one of the most instructive plays in aging research, including a plot twist two years later.
What it is about
Taurine is present in high concentrations in the heart, brain, muscles and retina; a person weighing 70 kilograms carries around 70 grams of it. The episode first sorts out the molecule’s everyday job: water balance of the cells, conjugation with bile acids, calcium balance of heart muscle cells, protection of the mitochondria, calming effect in the brain. Then comes the longevity story. In 2023 a paper in Science reported 10 to 12 percent longer life in mice and taurine levels that collapse with age. In 2025 a longitudinal analysis by the US National Institute on Aging turned exactly this age thesis on its head. At the end stands an inexpensive, well-tolerated molecule with real effects on blood pressure, heart and sport — and a longevity promise in the middle of a stress test.
Key points
- A person weighing 70 kilograms carries around 70 grams of taurine, mainly in the heart, brain, muscles and retina — that is basic equipment, not an exotic additive.
- Taurine was isolated as early as 1827 from ox bile, by the chemists Tiedemann and Gmelin; the molecule has thus been known for almost 200 years, longer than most vitamins.
- In the 2023 Science paper, mice that received taurine from middle age lived 10 to 12 percent longer, with denser bones, more muscle and better insulin sensitivity.
- The counter-analysis by the National Institute on Aging in 2025 followed the levels of almost 1,000 people over years: there, taurine did not fall with age; beyond 60 it tended to rise.
- What is established in humans is more sober: meta-analyses show a systolic reduction of a few millimeters of mercury in elevated blood pressure, plus slightly delayed fatigue and less muscle soreness in sport.
- Clinical studies mostly worked with 500 to 3,000 milligrams daily; the European authority classifies up to 6 grams per day as safe, and the substance is dirt cheap and tasteless.
- Taurine is found practically only in animal foods — meat, fish and especially mussels and seafood typically supply a few hundred milligrams a day, plants practically zero.
Where the data stop
The impressive rejuvenation data come from mice and rhesus monkeys, not from humans. That taurine measurably benefited these animals has not been refuted — the reasoning, however, is shaky: the thesis of a depleted taurine account in old age relied on cross-sectional data, the 2025 counter-analysis followed the same individuals over years, and longitudinal data beat cross-sectional data almost every time. By current knowledge, a low taurine level is not a reliable biomarker of aging.
The decisive randomized studies in humans are only now under way. Until then it remains open whether taurine also acts pharmacologically when the account is full, or not at all in humans. A single measurement is of little help, because the value fluctuates with meals, training and time of day. With pregnancy, kidney disease and drug combinations, the topic belongs in the hands of a physician anyway.
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Published on August 16, 2026.
The topic in the database
- Aminosulfonic acid with robust human data on blood pressure. The longevity narrative comes from animal models and was corrected in 2025.Taurine
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Information only, not medical advice and not a usage or dosage recommendation. Prescription-only and unapproved substances belong in the hands of a physician. Last updated: 2026-09-19.