The Effects of a Novel Mitochondrial Substrate Supplement on Exercise Performance and Cognitive Function

The goal of this clinical trial is to compare the effects of taking a new supplement for 16 days on cognitive function and exercise performance, compared to a placebo (a supplement that looks and tastes the same, but doesn't have the same ingredients) in 40 healthy individuals - 20 young individuals (aged 18-30) and 20 older individuals (aged 50-65). The main questions it aims to answer are: * If taking the supplement for 16 days improves exercise performance, or the speed with which the body responds to the commencement of exercise. * If taking the supplement improves cognitive function. Participants will visit the lab on 5 separate occasions to: * complete some cognitive tests * complete exercise performance tests * provide blood samples All exercise tests will be on an exercise bike. After 28 (or 46 for pre-menopausal females) days to make sure the supplement has left the body fully, participants will consume the opposite supplement and repeat the tests.