NADPH stands for nicotinamide adenine dinucleotide phosphate, a crucial coenzyme found in all living cells. It plays a vital role in various biochemical reactions, particularly in the process of photosynthesis in plants and cellular respiration in animals. NADPH serves as a reducing agent, providing the necessary electrons and hydrogen ions for the synthesis of organic molecules. In addition to its role in energy production, NADPH is essential for the biosynthesis of fatty acids and cholesterol. It also helps in the detoxification of reactive oxygen species, protecting cells from oxidative stress. Overall, NADPH is fundamental for maintaining cellular health and supporting metabolic processes.