Biohackers, Take Note

A recent study casts doubt on the efficacy of a supplement often heralded in longevity circles as a potential anti-aging miracle. This new evidence challenges earlier claims that touted it as an “elixir of life” after demonstrating health improvements and increased lifespan in various animals like worms, mice, and monkeys.

Taurine, an amino acid, serves many functions, including bolstering the immune and nervous systems. While our bodies do produce taurine naturally, a study published in 2023 found that its levels tend to decrease with age in humans, mice, and monkeys. Moreover, it suggested that taurine supplementation could extend a mouse’s life by 10-12% — which might translate to an additional seven to eight years for humans.

This revelation ignited enthusiasm among biohackers, with figures such as Bryan Johnson quickly incorporating taurine into their routines in hopes of achieving longer, healthier lives. However, it seems they may have jumped to conclusions.

A new investigation by scientists at the National Institutes of Health assessed taurine levels in humans of various ages, as well as in monkeys and mice. Surprisingly, they discovered no consistent decline in taurine levels with aging; in fact, these levels remained stable, or even increased, as participants aged.

The researchers suggested that limitations in prior studies might help explain these contradictory findings. Earlier research often relied on cross-sectional studies, examining different participants across various ages at one point in time, rather than following the same individuals over time. The latest study melded both cross-sectional and longitudinal data, the latter involving repeated blood sample collections from the same subjects as they aged.

Interestingly, while taurine levels did show variation among participants, these differences seemed to be influenced more by factors such as sex and species rather than aging alone. The scientists concluded that low circulating taurine levels probably aren’t reliable indicators of aging.

They also cautioned that the effectiveness of taurine supplements for delaying age-related issues likely hinges on multiple individual factors and circumstances.

That said, taurine does have health benefits. It acts as a powerful antioxidant and anti-inflammatory agent, contributing to digestion, energy production, immune response, neurological development, brain function, and overall sensory performance.

Even though your body synthesizes some taurine naturally, dietary intake is still crucial for maintaining optimal levels. People following a typical Western diet generally obtain sufficient taurine from animal products like seafood, meat, and dairy. On the other hand, vegans and vegetarians may find their levels are lower, as taurine isn’t prevalent in most plant sources. For them, supplements could be beneficial, and taurine is also commonly found in energy drinks and bars.