The Only Compound Proven To Clear Damaged Mitochondria And Rebuild Them Stronger

18 years of clinical research into every gummy. 25 human trials. 2,200+ participants.

Rebuilds new mitochondria

Enhances strength and endurance

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Rated 4.4/5 based on +1475 reviews

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

25 HUMAN CLINICAL TRIALS

18 YEARS OF RESEARCH

2,200+ PARTICIPANTS

THIRD PARTY TESTED

PUBLISHED IN JAMA & NATURE

What Happens When You Fix The Foundation

Energy, strength, recovery, inflammation, immunity. They all trace back to one thing. This fixes it.

Real Results, Real Customers

93%

More energy of participants felt a noticeable boost in daily energy with more endurance.

98%

Stronger of participants felt stronger without making any changes to their training.

91%

Recovered participants reported better sleep, less inflammation, stronger immune system.

90%

Sharper of participants noticed sharper focus and improved mental clarity.

90-Day Money Back Guarantee

 Rated 4.8 130,000+ Customers

Foundation Gummies Urolithan A 500MG

The only compound on earth proven to clear damaged mitochondria and replace them with new, fully functional ones.

More Energy & Endurance

Stronger Without Changing Training

Less Inflammation, Better Recovery

Sharper Mental Clarity

Better Sleep Quality

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Clinically Proven To Make You Feel Like This

Better Sleep Quality

Your body repairs during sleep. That repair runs on mitochondria.

Sharper Mental Clarity

Your brain uses 20% of your energy. Mitochondria make it.

Less Joint Stiffness & Inflammation

Damaged mitochondria trigger inflammation. Remove them, it stops.

Faster Recovery

Muscle repair is energy-intensive. Healthy mitochondria get it done faster.

Stronger Without Changing Training

Muscles are packed with mitochondria. Better mitochondria, more force.

More Energy & Endurance

Mitochondria produce your energy. More healthy ones, more of it.

How One Compound

Rebuilds Your Cellular Engine

  • Clear

    Urolithin A activates mitophagy, your body's natural process for identifying and removing damaged mitochondria that are producing less energy and more waste.

  • Rebuild

    With damaged mitochondria cleared, your cells trigger mitochondrial biogenesis, producing new, fully functional mitochondria to replace what was lost.

  • Perform

    More healthy mitochondria means more energy available to every system in your body. Muscles, brain, immune cells, recovery. Everything runs better.

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Why Urolithan A?

Our Brand

Creatine

NAD+/NMN

Increases Muscle Strength

Improves Endurance

Partial

Works Without Exercise

Reduces Chronic Inflammation

Rejuvenates Immune Function

Improves Cellular Energy Production

Partial

Partial

Replaces Damaged Mitochondria

Addresses Root Cause of Age-Related Decline

Partial

Makes Your Other Supplements Work Harder

What People Are Saying

Rated4.8 130,000+ Customers

I've had chronic knee inflammation for years. Twomonths in and I'm squatting pain-free for the firsttime since my 30s. I didn't change anything else. Justadded Onset.

Verified Buyer

Ankenny Bautista

10 days ago

I read every trial before buying. JAMA, Nature, CellReports. The data is real and now I can feel what thedata showed. Month three and my endurance in thegym is noticeably better.

Verified Buyer

Cherie Trout

7 days ago

I run a company and by 2pm I was useless. StartedOnset mostly for the physical benefits but the mentalclarity hit before anything else. I'm sharper longer andI don't fade in the afternoon anymore.

Verified Buyer

Mikhail Earle

25 days ago

I test quarterly with InsideTracker. After 90 days onOnset my CRP dropped from 2.8 to 1.4 and myinflammation score went from yellow to green. Firsttime a supplement actually showed up in my blood work.

Verified Buyer

Shequna Wilson

16 days ago

What To Expect With Biourocell

 

Activation

Urolithin A is absorbed within 6 hours of your first dose. Mitophagy pathways begin activating at a cellular level. Your body is starting the cleanup.

Benefits

  1. UA and its metabolites detected in plasma, confirming absorption and bioavailability.
  2. Mitophagy signals begin identifying damaged mitochondria for removal.
  3. Acylcarnitine levels start shifting, an early marker of improved mitochondrial efficiency.
  4. No noticeable changes yet. The process is cellular, not perceptual.

First Response

Your immune system is the first to respond. By day 28, measurable changes in immune cell composition are already visible in blood work.

Benefits

  1. Naive CD8+ T cells increase, a sign of immune rejuvenation.
  2. Fatty acid oxidation capacity up 14.7% in immune cells.
  3. Natural killer cell count raised.
  4. Some users begin noticing subtle improvements in energy and recovery.

Turning Point

This is where most users report first feeling the difference. Endurance improvements begin showing in the clinical data. Inflammation markers are trending down.

Benefits

  1. Peak VO2 improvement already manifesting at the 500mg dose.
  2. Muscle endurance measurably improving in hand and leg muscles.
  3. CRP beginning to separate from placebo.
  4. Energy feels more consistent. Recovery between sessions noticeably faster.

Momentum

The gap between you and baseline is widening. Strength, endurance, and inflammation are all moving in the right direction.

Benefits

  1. Strength gains accelerating toward the 12% improvement seen at 4 months.
  2. Inflammation continuing to drop while placebo group trends upward.
  3. Mitochondrial gene expression significantly upregulated in skeletal muscle.
  4. Recovery, energy, and physical performance feel reliably different from month one.

Full Clinical Effect

This is the dose and duration used in the landmark trials. You're now at the performance level the published data showed.

Benefits

  1. 12% increase in muscle strength without exercise change.
  2. 10% improvement in peak aerobic endurance.
  3. CRP significantly reduced while placebo increased 22%.
  4. Plasma acylcarnitines and ceramides reduced, indicating improved mitochondrial efficiency.

Compounding

Mitochondrial biogenesis is ongoing. Your body is continuously clearing damaged mitochondria and building new ones. The benefits maintain and build.

Benefits

  1. New mitochondria replacing old ones on an ongoing cycle.
  2. Strength, endurance, and inflammation benefits maintain with continued use.
  3. Immune resilience stays elevated as long as supplementation continues.
  4. Every system that runs on cellular energy continues to benefit.

What Experts Are Saying About Urolithin A

The clinical data on this compound is unlike anything I've seen in the supplement space. We’re talking randomised controlled trials showing measurable strength gains in people who didn't change their exercise routine. That almost never happens.

What Else Changes

When Your Mitochondria Work

Heart Health

Your heart has more mitochondria than any organ. Healthier mitochondria, stronger heart.

Your heart has more mitochondria than any organ. Healthier mitochondria, stronger heart.

Brain Function

Your brain burns 20% of your energy. Better mitochondria, clearer thinking.

Your brain burns 20% of your energy. Better mitochondria, clearer thinking.

Skin & Aging

Mitochondrial decline shows on your face first. Renewal does too.

Mitochondrial decline shows on your face first. Renewal does too.

Gut Health

Urolithin A is a postbiotic. It strengthens your gut barrier and reduces intestinal inflammation.

Urolithin A is a postbiotic. It strengthens your gut barrier and reduces intestinal inflammation.

Peptide Performance

Every peptide depends on ATP to signal and repair. More cellular energy, more of your protocol works.

Every peptide depends on ATP to signal and repair. More cellular energy, more of your protocol works.

Supplement Absorption

Cellular uptake runs on energy. When your cells have more, everything you take gets used better.

Cellular uptake runs on energy. When your cells have more, everything you take gets used better.

Try It For 90 Days.Feel It Or Get Every Cent Back.

We make sure every customer actually gets results or we refund you 100% of your investment. We're so confident you'll feel the difference, we bear all the risk.

Rated4.8 130,000+ Customers

18 Years Research

300+ Studies

Gold Standard Trials

Third Party Tested

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Frequently Asked Questions

Urolithin A is a naturally occurring compound produced by gut bacteria when you eat foods like pomegranates, berries, and walnuts. However, only about 40% of people produce it naturally. It is the only compound clinically proven to activate mitophagy, the process of clearing damaged mitochondria and triggering your body to build new ones.

Urolithin A is absorbed within hours and begins activating mitophagy at a cellular level in the first week. Immune cell improvements were measured at 28 days. Most users report noticeable changes in energy and recovery around month 2. Full clinical effects on strength, endurance, and inflammation were seen at 4 months in the published trials.

Yes. Urolithin A works at the mitochondrial level, which is upstream of most other supplements. It improves the cellular energy production that every other supplement depends on to be absorbed and utilised. It pairs well with creatine, CoQ10, omega-3s, and protein. No known interactions have been reported across multiple clinical trials.

Only about 40% of people have the right gut bacteria to convert pomegranate polyphenols into Urolithin A. Even those who can produce it naturally generate far less than the clinical dose. Direct supplementation delivers 6x more Urolithin A than pomegranate juice and bypasses the guesswork entirely.

Urolithin A has FDA GRAS (Generally Recognised as Safe) status. It has been tested across multiple randomised, double-blind, placebo-controlled clinical trials with no serious adverse events reported. Every batch of Onset is third-party tested for purity, potency, and heavy metals.

Onset comes with a 90-day money-back guarantee. If you're not satisfied for any reason, contact us for a full refund. No questions asked.