A global team of scientists is investigating the NAD⁺ molecule, which plays a key role in maintaining cellular energy, DNA repair and overall health[query]. NAD⁺ levels decline with age, which can lead to diseases such as Alzheimer's and Parkinson's[query][1][3]. Researchers are testing ways to increase NAD⁺ using compounds such as NR and NMN[query][1]. Early studies suggest improvements in memory, metabolism and physical function[query]. Clinical trials for Alzheimer's and Parkinson's disease show slowing and even reversal of symptoms with NAD⁺[1]. NR as a precursor of NAD⁺ rescues mitochondrial defects and neuronal loss in models of Parkinson's disease[1]. NAD⁺ activates the enzymes sirtuins and PARP, which are essential for DNA repair[1]. NAD⁺ supplementation may promote healthy aging and protect the brain[2][3].