Lifelong restriction of dietary valine has sex-specific benefits for health and lifespan in mice

Mariah F. Calubag, Ismail Ademi, Dudley W. Lamming

1. 01

   Median male lifespan increased 23% with lifelong valine restriction (Val-R)

2. 02

   Reduced frailty, cancer prevalence and senescent-cell burden in BOTH sexes

3. 03

   Improved leanness and glycemic control across ages in both sexes

4. 04

   Increased energy expenditure via induction of brown adipose tissue thermogenesis

5. 05

   Liver gene module enriched for mitochondrial pathways with increased hepatic mitochondrial respiration in Val-R males

6. 06

   Females gained healthspan without a lifespan benefit — a clear sex-specific dissociation

Study Design

Preclinical Study

Sample Size

Not reported

Study Duration

Lifelong (survival study)

Methodology

Lifelong dietary intervention in C57BL/6J mice with defined amino-acid diets restricting valine alone; longitudinal metabolic phenotyping, frailty indexing, tumour surveillance, senescent-cell burden assessment, cross-tissue transcriptomics and hepatic respirometry.

Limitations

Rodent study in a single inbred strain (C57BL/6J). Lifespan extension was male-only; females showed healthspan but not lifespan benefit, which constrains translational generalisation. No human data on valine-restricted formulations, and long-term low-valine intake in humans carries unstudied risks for muscle protein synthesis in older adults.