In over two decades of clinical practice, Dr Tang observed the same pattern repeatedly: patients in their 40s and 50s arriving with complaints of declining energy, deteriorating sleep, slower recovery and reduced cognitive sharpness — and leaving with no satisfactory answers. The NHS, understandably, is not designed to address the biology of healthy ageing. It addresses disease. The space between "not ill" and "thriving" is largely unoccupied by mainstream medicine.

The emerging science of NAD+ decline, sirtuin biology and longevity supplementation offered a scientifically credible set of tools for addressing exactly this space. But the UK supplement market was dominated by either overpriced premium brands with large marketing budgets, or cheap underdosed products with no clinical oversight. Little Ox was founded to occupy the gap: high-quality, independently tested formulas, designed by a practising doctor, priced honestly.

No false promises. Every claim we make is grounded in what the clinical evidence actually supports. Where evidence is preliminary or contested, we say so. We do not oversell NMN as a miracle drug. We do not dismiss it as a scam. We tell you what the trials show, what the limitations are, and what you can realistically expect.

high-quality, independently tested ingredients. Our NMN is independently tested high-purity β-NMN, the biologically active isomer, independently third-party tested at every batch. We do not use fillers, binders or undisclosed excipients.

Honest pricing. Direct-to-consumer, no retail markup, no influencer fees built into the price. NMN Pure from £7.99. The same standard of formula that sells for £40+ elsewhere.

MHRA and ASA compliant. Every product description and claim is reviewed against UK supplement advertising regulations. No disease treatment claims, no unsubstantiated efficacy assertions.

Little Ox was founded by Dr Chun Tang — a practising NHS and private GP with over 26 years of clinical experience, currently practising at Pall Mall Medical in Manchester, one of the UK's leading CQC-registered private healthcare clinics.

Dr Tang holds an MBChB from the University of Manchester, MRCGP (Membership of the Royal College of General Practitioners), DFFP (Diploma of the Faculty of Family Planning), JCPTGP, and an MBA from the Open University Business School. His clinical background spans Family Medicine, Emergency Medicine, Paediatrics, Gynaecology, Geriatrics and Rehabilitation — a uniquely broad foundation for understanding what the body actually needs at every stage of life.

He has been quoted as a medical authority by The Telegraph, The Mirror, The Independent, Women's Health magazine and Pharmaphorum, among others. As Medical Director of Biox Medical Ltd and co-founder of MeCheck (a clinical diagnostic testing platform), he has spent the last decade working at the intersection of preventative medicine and accessible healthcare.