A groundbreaking compound discovered after nearly two decades of research is showing remarkable promise for slowing aging at the cellular level.
And the science behind it is more compelling than many of the longevity interventions currently making headlines.
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In a recent episode of The Human Upgrade podcast, biohacker Dave Asprey sat down with Dr. Chris Rinsch, co-founder and PhD cell biologist behind Timeline, to discuss urolithin A—a postbiotic molecule that activates mitophagy, the body’s critical cleanup process for damaged mitochondria.
The results from clinical trials rival those of caloric restriction and pharmaceutical interventions, but without the downsides.
Timeline didn’t start with a flashy marketing campaign. It started with a mission to bring pharmaceutical-grade science to the nutrition world.
Eighteen years ago, Dr. Rinsch and his team set out to tackle aging where it begins: mitochondrial decline. At the time, talking about longevity wasn’t trendy—it was academically risky.
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18 years ago, it wasn’t cool to talk about longevity. You could say, ‘I want to have new wrinkles on my skin,’ but you couldn’t say, ‘I’m working on the core problems of aging.’
Mitochondria—often called the “powerhouses of the cell”—were already known to play a role in aging. But the connection wasn’t fully understood, and tools to measure aging didn’t yet exist.
Still, Dr. Rinsch believed that mitochondrial dysfunction was a root cause of age-related decline across organs—from the brain to the heart to the muscles.
From Pomegranates to a Powerful Postbiotic
The team’s research led them to an unexpected place: pomegranates. This ancient fruit, long associated with fertility and longevity, contained compounds called ellagitannins.
But here’s where it gets interesting. Ellagitannins themselves aren’t what matter most.
When consumed, gut bacteria transform ellagitannins into a molecule called urolithin A. This postbiotic is what actually triggers biological effects in the body—specifically, a process called mitophagy.
Maybe urolithin A isn’t just the body’s way of eliminating ellagitannin, but maybe urolithin A is something that’s very important. It’s a molecule that’s going to be biologically active in the body.
There’s just one problem: only 30 to 40% of people have the right gut bacteria to make this conversion happen naturally. That’s why Timeline developed a proprietary form called Mitopure—delivering urolithin A directly, bypassing the need for gut transformation.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
Full-body training with one weight using swings, squats, and presses
Solid cast iron build that feels stable and lasts for years
Comfortable grip that makes high-rep workouts easier to handle
What Is Mitophagy and Why Does It Matter?
Mitophagy is the body’s recycling system for mitochondria. As we age, damaged mitochondria accumulate, causing cellular dysfunction, inflammation, and energy decline.
Mitophagy clears out these “dim bulbs,” making room for fresh, functional mitochondria. It’s like taking out the trash at the cellular level—except this trash directly impacts how you age.
Dr. Rinsch’s team discovered that urolithin A activates this pathway powerfully. In early worm studies, it extended lifespan by 45%—comparable to caloric restriction, the gold standard for longevity interventions.
The gold standard is caloric restriction, and caloric restriction extends the life of worms about 47%. So it’s about on the same magnitude.
In mice, the effects were just as striking. Older mice given urolithin A showed 40% more running endurance—without changing their diet or exercise routine.
Human Trials Show Real-World Benefits
Animal studies are promising, but human data is what separates hype from reality. Timeline has now conducted over 15 randomized clinical trials, a level of rigor virtually unheard of in the supplement industry.
Immune Health Improvements in Just One Month
A recent study published in Nature Aging looked at adults aged 50 to 70 who took one gram of urolithin A daily for one month.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
Full-body training with one weight using swings, squats, and presses
Solid cast iron build that feels stable and lasts for years
Comfortable grip that makes high-rep workouts easier to handle
The results? Increased levels of CD8 T naïve cells and natural killer (NK) cells—critical components of a youthful immune system. There was also a measurable decrease in inflammation, addressing the phenomenon known as “inflammaging.”
People 50 to 70, they took Timeline for a month and they saw improvements in their immune system.
These changes occurred after analyzing mitochondrial gene expression and function within immune cells—proof that urolithin A was working at the cellular level.
Mitochondrial Gene Expression Boost
In muscle biopsy studies, participants taking 500 mg to 1 gram of Mitopure showed increased expression of mitochondrial genes after just one month.
This suggests the body is ramping up mitochondrial production and function—exactly what declines with age.
We see an improvement in mitochondrial function by looking at an increase in the gene expression of mitochondrial genes. And this is after a month of taking.
Skin Health and Collagen Production
Timeline also developed a topical formulation. In clinical trials, participants saw statistically significant reductions in fine lines and wrinkles after eight weeks.
Skin biopsies revealed improved collagen gene expression and reduced inflammation following UV exposure—by over 10%.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
Full-body training with one weight using swings, squats, and presses
Solid cast iron build that feels stable and lasts for years
Comfortable grip that makes high-rep workouts easier to handle
After 8 weeks, we see a statistically significant improvement in reduction in fine lines and wrinkles.
The science caught the attention of L’Oréal, which became an investor and research partner. The cosmetics giant is now working to incorporate urolithin A into its own product lines.
How Urolithin A Stacks Up Against Other Longevity Compounds
Longevity enthusiasts are familiar with NAD+ precursors and rapamycin. Both have shown promise, but they come with limitations.
Rapamycin, for instance, is immunosuppressive and requires medical supervision. NAD+ boosters work through different pathways and may complement urolithin A, but the clinical evidence for urolithin A is more robust.
Dave Asprey, who has spent over $2.5 million on longevity interventions, shared his personal take:
If I could only pick Timeline versus an NAD stack based on the numbers, I would pick Timeline, but I’m not dumb, so I’m going to do both.
The key difference? Urolithin A has more published human trials than most longevity supplements on the market—and it’s accessible, affordable, and safe for long-term use.
Why You Can’t Just Eat Pomegranates
It’s tempting to think a daily glass of pomegranate juice might do the trick. Unfortunately, it won’t.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
Full-body training with one weight using swings, squats, and presses
Solid cast iron build that feels stable and lasts for years
Comfortable grip that makes high-rep workouts easier to handle
First, most people lack the gut bacteria needed to convert ellagitannins into urolithin A. Second, even if you do have the right microbiome, the amount produced is inconsistent and often insufficient.
Third, pomegranate juice is high in sugar and contains oxalates, which can cause joint pain and other issues in sensitive individuals.
Only about 30 to 40% of the people out there have the right gut microbiota to actually transform these ellagitannins into urolithin A.
That’s why direct supplementation with Mitopure is the most reliable way to ensure you’re getting the active compound at effective doses.
The Ideal Dosing and Routine
Based on clinical research, 500 mg daily is the recommended starting dose. Some users, including Asprey, take up to 1 gram per day.
Consistency is key. This isn’t a stimulant or a quick fix—it’s a long-term investment in cellular health.
For you to really feel the effect, it’s best to take it for about two to four months. And take it continually.
It doesn’t matter if you take it fasted or fed, morning or evening. What matters is daily use over weeks and months, allowing mitophagy to reset mitochondrial health from the inside out.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
Full-body training with one weight using swings, squats, and presses
Solid cast iron build that feels stable and lasts for years
Comfortable grip that makes high-rep workouts easier to handle
What the Future Holds
Timeline is currently participating in the XPRIZE Healthspan competition, which challenges teams to create interventions that slow aging by 10 to 20 years in muscle, immune, or brain function over one year.
Additional studies are underway with the National Institute on Aging and research institutions in Germany, exploring urolithin A’s effects on post-cancer immune recovery and central nervous system health.
Dr. Rinsch envisions a future where urolithin A becomes as routine as brushing your teeth—part of everyone’s daily wellness ritual.
What we’re trying to do is establish urolithin A as the most clinically investigated longevity nutrient that exists.
With backing from L’Oréal, ongoing clinical trials, and a growing body of peer-reviewed research, that vision is becoming reality.
Final Takeaway
Mitochondrial health isn’t just about energy—it’s about aging well. From immune function to skin quality to muscle endurance, urolithin A addresses aging where it starts.
Unlike many supplements with minimal backing, Timeline’s Mitopure is supported by rigorous clinical science, published in top-tier journals, and used by tens of thousands of people worldwide.
If you’re serious about longevity, this is one compound worth adding to your stack.
