Re-inventing Biology
Microbiome science, decoded from the guts of elite athletes to fundamentally change how we optimize our bodies.
Bacteria sourced from the finest microbiomes on the Earth
You can't see your microbiome, so it's easy to ignore. But it's quietly involved in your sleep, your energy, your digestion, and how fast you recover. Here's the problem we set out to solve, what we found, and why it matters even if you've never run a marathon.
Modern life quietly wrecks your gut bacteria.
Processed food, stress, poor sleep, antibiotics, and sendentary lifestyles all reshape your microbiome — usually for the worse. The result shows up as fatigue, restless sleep, sluggish digestion, and slower recovery, but almost nobody connects those symptoms back to their gut.
Elite athletes' guts held the answer.
Researchers from Wyss Institute sequenced the gut microbiomes of ultra-marathoners before and after the race. Specific bacterial strains spiked after finishing - strains that were nearly absent in sedentary people. Those strains became the secret to your longevity journey.
You don't need to be elite to benefit.
These strains occur naturally in the human body — we didn't engineer them, we found them. That means supplementing with them works with your existing biology instead of against it, whether you run marathons or just want to feel less tired.
You have 39 trillion microbial roommates.
Most people are ignoring them.
Your gut microbiome is a living ecosystem of bacteria — roughly 39 trillion microorganisms that outnumber your human cells. Together, they encode 150× more unique genes than your own genome and 90% of your short-chain fatty acids, operating as a second brain that influences nearly every aspect of your health.
These microbes aren't passive residents — they actively produce neurotransmitters, regulate immune function, synthesize vitamins, and convert dietary compounds into bioactive metabolites your cells use as fuel. Veillonella atypica, the bacterium at the core of V·Nella, does exactly that: it takes lactic acid — the byproduct of intense exercise — and converts it into propionate, a short-chain fatty acid that re-enters your mitochondria as usable energy.
The problem: modern life — processed food, chronic stress, poor sleep, antibiotics — systematically depletes the high-performance strains found in fit individuals. The result is fatigue, slow recovery, disrupted sleep, and blunted cognition that most people attribute to "just getting older."
human genome
in your gut
lives in your gut
Your lactic acid isn't waste.
V·Nella turns it into fuel.
During exercise, your muscles produce lactate — a byproduct of anaerobic glycolysis. In most people, excess lactate accumulates, triggering fatigue, muscle burn, and slower recovery. But our researchers discovered something remarkable: elite endurance athletes carry high abundances of Veillonella atypica, a microbe that metabolizes lactate into propionate — a short-chain fatty acid (SCFA) with profound systemic effects.
Propionate re-enters your bloodstream and acts across multiple organ systems. It fuels mitochondria directly, activates the vagus nerve to signal the brain, reduces systemic inflammation, and promotes lean muscle recovery. Initial results were published in Nature Medicine, with further studies showing supplementation with Veillonella atypica leads to 52 more days without fatigue interfering in the span of a year vs. controls — without any change in training.
4000+ peer-reviewed studies have investigated propionate and other short-chain fatty acids, linking them to mitochondrial metabolism, immune regulation, inflammation, gut barrier function, and metabolic health. Emerging research also suggests roles in healthy aging and brain health.
The ScienceYou thought probiotics were just for your digestion.
Nella proves you wrong.
The gut-immune-brain axis is one of the most consequential and least understood pathways in human biology. Your gut microbiome doesn't just process food — it directly regulates immune tone, neurological signaling, and hormonal balance through your gut-immune-brain connection.
Nella's proprietary strains activates this axis, producing measurable reductions in reactive oxygen species (free radicals) — the cellular stress markers linked to accelerated aging, inflammation, and metabolic dysfunction. In clinical data, users experienced reductions in systemic inflammatory markers alongside improved sleep architecture and recovery.
Additionally, the gut microbiome plays a critical role in androgen metabolism. Optimizing microbial diversity has been associated with increased free testosterone bioavailability — a benefit that extends beyond athletes to anyone experiencing the hormonal shifts of aging.
12,000+ peer-reviewed studies demonstrating continuous communication between the microbiome, immune system, and nervous system through microbial metabolites, immune signaling, and neural pathways.
The ScienceNot all microbiome solutions are made equal.
We decoded the guts of ultra-marathon runners. See how we compare.
How V·Nella really compares.
Endurance, recovery & energy — measured against the supplements already in your routine.
Comparisons reflect typical, publicly available product and ingredient information. Individual brands vary.
The difference? It's where the strains came from and whether anyone actually tested if they work. We can point to the athlete, the lab, and the published paper for both.
The published science behind every claim.
Each FitBiomics product is built on research that passed peer review and was published in leading scientific journals — not proprietary studies kept behind closed doors.
From the community who wanted to experience the biological upgrade.
Verified reviews from real customers.
Microbiome-based fitness: Veillonella atypica converts exercise-induced lactate to propionate, enhancing athletic endurance in mice and humans
Human gut microbiome modulation via comparative diet- and supplement-induced shifts in endurance athlete physiology
Microbiome-derived metabolites as performance enhancers: propionate and the endurance-fatigue axis
Probiotic supplementation with Veillonella atypica improves recovery and reduces fatigue biomarkers in recreational athletes
"As a former athlete and current fitness goer, probiotics has been an important part of my daily supplements. Love how this product is designed for the active person."
"I've been taking Nella for well over a year and V Nella since it came out. I'm an endurance runner (marathons, ultras. Longest is 100k). My legs rarely get really tired and I credit this stuff. Thank you to your scientists for figuring out this level up unlock!"
"V-Nella has helped me more than I could ever have hoped for. I am 58 years old and play ice hockey. I was really struggling to get through a full game and was exhausted by the end. My legs were also sore the next morning."
"I decided to try this when Kiran Krishan mentioned it on one of his amazing gut health/microbiome interviews. In just a month I can see a difference. Definitely more energy - enough to last the day and more - and also better sleep."
"I am a 38-year old mom of two kids 5 and under, and my workouts have not been what they used to be before kids despite trying to get back into it. I've been looking to maximize my 30-min workouts - it is what I have time for these days."
"When my boyfriend handed me a box of V-Nella, I admit I was sceptical. But, as a 59-year old runner whose fatigue level has increased in recent years, I'd figured I'd give it a try. After 3 days, I started to notice a decrease in fatigue."
"I have noticed an improvement in both digestion and sleep. I already have a pretty high energy level considering my age and activity level, however, it has made my digestion so consistent!"
"I've been struggling with bad sleep and gut health due to SIBO, Taking Nella has completely solved for my motility and sleep quality. I fall asleep and stay asleep, honestly in disbelief. I highly recommend this product, it's the first of many I've tried that works!"
"Been taking these products together for a few months and when I ran out, WOW I noticed the difference. These keep me at my best. Energy, sleep, and regulated belly!"
"I have felt a major difference since taking these probiotics—I sleep better, I recover faster, and feel more energetic during the day. Highly recommend!"
"As a MTB athlete racing in the CAT 1/ Open-Pro category, I first heard about Veillonella and FitBiomics on the Plant Fueled Podcast by Cass Warbeck. Ever since, I have been watching this product take form. As soon as I could, I ordered some."
"This thing works wonders, could workout longer and harder. Recovery was even better, soreness went away pretty quickly - was recovering like my younger days."
"VNella has exceeded expectations. My days no longer have the 3PM slump. I’ve been using VNella for 2 and a half months and my results have remained consistent throughout"
"As somebody who struggles with energy use challenges, I was astonished to feel the difference after only a few days of taking the product! I have been telling friends and family about it, and eagerly awaiting its launch."
"As soon as I started adding VNella to my daily routine, I noticed that I had an “extra gear” so to speak in the gym."
"V-Nella is giving me insane energy. I am a 57 year old, post-menopausal woman who has been chronically tired for decades."
"Taking VNella feels like I just upgraded my own personal battery pack. I have more energy and I walk into my workouts as excited and ready as ever. V•Nella is a better version of products already out there. It allows me to keep up with my kids."
"When taking Veillonella I felt I had more energy, could exercise with greater intensity and had more restful sleep"
"As a former athlete and current fitness goer, probiotics has been an important part of my daily supplements. Love how this product is designed for the active person."
"I've been taking Nella for well over a year and V Nella since it came out. I'm an endurance runner (marathons, ultras. Longest is 100k). My legs rarely get really tired and I credit this stuff. Thank you to your scientists for figuring out this level up unlock!"
"V-Nella has helped me more than I could ever have hoped for. I am 58 years old and play ice hockey. I was really struggling to get through a full game and was exhausted by the end. My legs were also sore the next morning."
"I decided to try this when Kiran Krishan mentioned it on one of his amazing gut health/microbiome interviews. In just a month I can see a difference. Definitely more energy - enough to last the day and more - and also better sleep."
"I am a 38-year old mom of two kids 5 and under, and my workouts have not been what they used to be before kids despite trying to get back into it. I've been looking to maximize my 30-min workouts - it is what I have time for these days."
"When my boyfriend handed me a box of V-Nella, I admit I was sceptical. But, as a 59-year old runner whose fatigue level has increased in recent years, I'd figured I'd give it a try. After 3 days, I started to notice a decrease in fatigue."
"I have noticed an improvement in both digestion and sleep. I already have a pretty high energy level considering my age and activity level, however, it has made my digestion so consistent!"
"I've been struggling with bad sleep and gut health due to SIBO, Taking Nella has completely solved for my motility and sleep quality. I fall asleep and stay asleep, honestly in disbelief. I highly recommend this product, it's the first of many I've tried that works!"
"Been taking these products together for a few months and when I ran out, WOW I noticed the difference. These keep me at my best. Energy, sleep, and regulated belly!"
"I have felt a major difference since taking these probiotics—I sleep better, I recover faster, and feel more energetic during the day. Highly recommend!"
"As a MTB athlete racing in the CAT 1/ Open-Pro category, I first heard about Veillonella and FitBiomics on the Plant Fueled Podcast by Cass Warbeck. Ever since, I have been watching this product take form. As soon as I could, I ordered some."
"This thing works wonders, could workout longer and harder. Recovery was even better, soreness went away pretty quickly - was recovering like my younger days."
"VNella has exceeded expectations. My days no longer have the 3PM slump. I’ve been using VNella for 2 and a half months and my results have remained consistent throughout"
"As somebody who struggles with energy use challenges, I was astonished to feel the difference after only a few days of taking the product! I have been telling friends and family about it, and eagerly awaiting its launch."
"As soon as I started adding VNella to my daily routine, I noticed that I had an “extra gear” so to speak in the gym."
"V-Nella is giving me insane energy. I am a 57 year old, post-menopausal woman who has been chronically tired for decades."
"Taking VNella feels like I just upgraded my own personal battery pack. I have more energy and I walk into my workouts as excited and ready as ever. V•Nella is a better version of products already out there. It allows me to keep up with my kids."
"When taking Veillonella I felt I had more energy, could exercise with greater intensity and had more restful sleep"