Purina Life Span Study still yields results

Twenty-five years after its original findings were published, Purina's Life Span Study continues to provide material for scientific research. According to a press release issued by Nestlé Purina PetCare on 12 October 2026, researchers have used data from the study to develop and validate a biological clock for dogs.

The research focuses on biological age, which may differ from chronological age. Using longitudinal data and clinical markers, researchers are investigating ways to estimate biological ageing and predict health trajectories and mortality risk in dogs.

The approach could eventually be relevant to the pet food industry, particularly for the development and evaluation of diets targeting healthy ageing. Biological age measurements might provide an additional means of assessing the long-term effects of nutritional interventions. However, the company has not disclosed any specific commercial applications resulting from the latest research.

The original 14-year study followed 48 Labrador Retrievers from seven litters throughout their lives. In each matched pair, one dog received 25 per cent less food than its littermate to maintain a lean body condition.

The lean-fed dogs lived a median of 13 years, compared with 11.2 years for the control group. They also reached a later age before requiring treatment for chronic conditions associated with ageing: 12 years compared with 9.9 years.

For manufacturers and specialist retailers, the research is relevant to the categories of weight management, senior nutrition and preventive pet health. It also raises questions about how biological ageing could eventually be measured and addressed through nutrition.

The latest findings illustrate how data from long-term feeding studies can continue to inform research decades after the original investigations were completed.