Taurine is a small amino-acid–like compound that shows up quietly on nutrition labels and energy drink cans, but a major 2023 study in Science asked a much bigger question: Could falling taurine levels be one of the drivers of aging itself?

The researchers measured taurine in the blood of mice, monkeys, and humans, then tested what happened when they restored taurine levels in aging animals. The results were striking enough that the authors concluded that “taurine deficiency may be a driver of aging” in several species and that human trials are now warranted.

What did the researchers do?

The team started with a simple observation: blood taurine levels fall with age in mice, monkeys, and humans. They then asked two key questions:

• Does taurine supplementation improve health and life span in animals?
• Are taurine levels in humans linked with age-related health problems?

To answer these, they:

• Measured taurine levels across age in mice, monkeys, and humans
• Gave daily taurine supplements to middle-aged mice until the end of life
• Supplemented taurine in aging monkeys
• Tested taurine in worms and yeast
• Looked at how taurine affected cellular “hallmarks of aging” in lab experiments

Key findings in animals

In mice, taurine supplementation started in middle age led to:

• Longer life span: median life span increased by about 10–12%
• Higher life expectancy at older ages: at 28 months, life expectancy was about 18–25% higher
• Better health span: improved function in bone, muscle, pancreas, brain, fat, gut, and immune system

In monkeys, taurine did not extend life span (they were not followed to the end of life), but it did:

• Improve several health markers
• Support better metabolic and inflammatory profiles

In worms, taurine supplementation also extended life span. In yeast, it did not.

What changed at the cellular level?

The researchers looked at several “hallmarks of aging” and found that taurine supplementation:

• Reduced cellular senescence (cells that have stopped dividing but continue to secrete inflammatory signals)
• Protected against telomerase deficiency (a factor in shortened telomeres)
• Improved mitochondrial function (the cell’s energy factories)
• Decreased DNA damage
• Reduced chronic, low-grade inflammation (“inflammaging”)

Taken together, these changes suggest that taurine is not just a bystander but may actively influence multiple aging pathways in animals.

What about humans?

In humans, this study did not test taurine supplements directly. Instead, the researchers:

• Measured taurine levels in people of different ages
• Looked at how taurine levels related to age-related diseases
• Measured taurine changes after exercise

They found that:

• Taurine levels decline with age in humans
• Lower taurine levels were associated with more age-related health problems
• Taurine levels rose after endurance exercise, suggesting one way the body may naturally boost taurine

However, we still do not know whether taurine supplements in humans will safely improve health span or life span. The authors explicitly call for long-term, well-controlled clinical trials.

Comparison: Taurine effects across species

How strong is this evidence?

This is a large, multi-species, mechanistic study published in a top-tier journal. For animals, the evidence that taurine can improve health span—and in some cases life span—is strong.

For humans, the evidence is still indirect:

• We know taurine levels fall with age
• We know lower taurine is linked with worse health
• We know exercise can raise taurine levels
• We do not yet know whether taurine supplements safely improve health span or life span

The authors themselves emphasize that human clinical trials are needed before taurine can be recommended as an anti-aging therapy.

What this means for older adults

This study does not prove that older adults should start taking taurine supplements for longevity. It does, however, highlight taurine as a promising piece of the aging puzzle and suggests several practical takeaways:

• Exercise remains a cornerstone: endurance exercise naturally raises taurine levels and has many proven benefits.
• Diet matters: taurine is found in animal-based foods (especially seafood and meat). People with very low intake may have lower taurine levels.
• Supplements are not yet proven for aging: until human trials are done, taurine supplements for longevity should be considered experimental.

If you are considering taurine supplements, it is important to discuss this with a healthcare professional who knows your medical history and medications.

Reference

The article is available here: Taurine deficiency as a driver of aging