25th European Nutrition and Dietetics Conference
Massey University, New Zealand
Title: Systematic review of the health and performance benefits of nitrate-rich beetroot supplementation in older adult
Biography: Luke A Stanaway
Statement of the Problem: Supplementation with nitrate-rich (NO3-) beetroot juice has been shown to improve exercise performance and cardiovascular (CV) responses, due to increased nitric oxide (NO) availability. However, it is unclear whether these benefits are greater in older adults who have an age-related decrease in NO and higher risk of disease.
Methodology & Theoretical Orientation: This systematic review examines 12 randomised, crossover, control trials investigating food-based NO3- supplementation (from beetroot) in older adults and its potential benefits on CV, cerebrovascular and metabolic health and physiological and cognitive performance.
Findings: Five studies reported improvements in CV health (blood pressure and blood flow), while five found no improvement. Four studies found improvements in physiological performance (time to exhaustion) following nitrate-rich beetroot supplementation in older adults. One study showed improvements in cerebrovascular health. Two studies investigate metabolic health (glucose and insulin control) and found no significant benefits.
Conclusion & Significance: The current literature indicates benefits of nitrate-rich beetroot supplementation in older adults on physiological performance, with mild evidence indicating benefits on cardiovascular and cerebrovascular health. Effects on cognitive performance were mixed and studies on metabolic health suggest no benefit. However, there is limited research on the effects of nitrate-rich beetroot supplementation in older adults, thus further study utilising a randomised, double-blind, control trial design is required.