What is Biological Drift?
Biological drift is the gradual shift in your cells, genes and metabolism as you age, showing up as weight that won't budge, hormones in flux, brain fog, low energy and a body that feels older than it should.
Here's how to see it.
A single test shows this drift. Two tests shows its direction. Testing three or more times shows where it's heading, giving you time to change course before symptoms become harder to reverse. The best part? Every test happens at home.
A second test shows whether your biology is heading the right way, often before symptoms like brain fog or low mood become obvious.
Your first test shows exactly where your weight, hormones, energy and gut function stand today, before you change anything.
Three or more tests let vivaSIM model your trajectory, showing what's likely next and what to change now to shift it.
Every test reads combined weight, hormones, gut function and energy signals, so your baseline, direction and forecast tell one connected story.
Decode your biology and track your drift.
Standard testing will tell you an issue exists but it doesn't tell you why. Our proprietary tri-layer testing protocol decodes your gut microbiome, metabolic health and lifestyle information at a cellular level. It provides you the context behind your sleep issues, brain fog, weight gain, energy slumps and hormone changes - your Biological Drift. The best bit? You do all your testing at home.
Your gut microbiome is a complex community of trillions of microorganisms influencing digestion, metabolism, cognitive, mood and immune function and general energy.
Metabolism determines how efficiently your gut converts food into energy, amino and fatty acids, and how efficiently they are used by your body in all of its processes.
When, what and how much you eat, how often you exercise, past and present health and medications, all further contextualise your biological data.
Tracking your biology over time helps you see your Biological Drift to optimise your digestion, sleep, immunity, energy levels, cognitive function, hormones and longevity
Your biology is unique, as will be your health plan
Our biology and lifestyles are all unique and change over time. Our once-off tests and scheduled testing membership plans provide you a snapshot of where your biology is today and where it's heading, to you help you make the appropriate decisions for your future health.
Gut microbiota significantly influences your skin, hair, nails, brain function and menopause symptoms.
Reducing cardiovascular risk, brain fog, fatigue, and joint pain are all linked to a healthy gut.
- Microbiome Testing
- Metabolite Testing
- Lifestyle Assessment
- Comprehensive Report - Over 100 Biometric Markers
- Personalised Nutrition Plan and Supplement Recommendations
- Scheduled Retesting To Track Changes In Your Biology
- Nutrition & Lifestyle Tips
- All delivered to you
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Top Picks
Stay informed with our curated selection of the latest studies and expert insights in decoding your own biometric data to track your biological drift to improve your healthspan.
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What this page is based on
Every numbered claim on this page links to a record in PubMed, the US National Library of Medicine's index of biomedical literature.
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Hills RD, Pontefract BA, Mishcon HR, Black CA, Sutton SC, Theberge CR. Gut Microbiome: Profound Implications for Diet and Disease. Nutrients. 2019;11(7):1613. PMID: nu11071613
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Rathore K, Shukla N, Naik S, Sambhav K, Dange K, Bhuyan D, Haq QMI. The Bidirectional Relationship Between the Gut Microbiome and Mental Health: A Comprehensive Review. Cureus. 2025;17(3):e80810. PMID: 40255763
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Cryan JF, O'Riordan KJ, Cowan CSM, et al. The Microbiota-Gut-Brain Axis. Physiol Rev. 2019;99(4):1877-2013. PMID: 31460832
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Baker JM, Al-Nakkash L, Herbst-Kralovetz MM. Estrogen-gut microbiome axis: Physiological and clinical implications. Maturitas. 2017;103:45-53. PMID: 28778332
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Zhao Y, Yu C, Zhang J, Yao Q, Zhu X, Zhou X. The gut-skin axis: Emerging insights in understanding and treating skin diseases through gut microbiome modulation (Review). Int J Mol Med. 2025;56(6):210. PMID: 41041846
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Liu Z, Liu X. Gut microbiome, metabolome and alopecia areata. Front Microbiol. 2023;14:1281660. PMID: fmicb.2023.1281660
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Zhang S, Li J, Li L, Yuan X. Gut microbiota on cardiovascular diseases: a mini review on current evidence. Front Microbiol. 2025. PMID: fmicb.2025.1690411
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Sánchez Romero EA, Meléndez Oliva E, Alonso Pérez JL, Martín Pérez S, Turroni S, Marchese L, Villafañe JH. Relationship between the Gut Microbiome and Osteoarthritis Pain: Review of the Literature. Nutrients. 2021;13(3):716. PMID: 33668236
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Asadi A, Shadab Mehr N, Mohamadi MH, Shokri F, Heidary M, Sadeghifard N, Khoshnood S. Obesity and gut-microbiota-brain axis: A narrative review. J Clin Lab Anal. 2022;36(5):e24420. PMID: 35421277
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Oh HSH, Rutledge J, Nie D, et al. Organ aging signatures in the plasma proteome track health and disease. Nature. 2023;624(7990):164-172. PMID: 38057571