**3. Factors that affect memory: Scanning for glucose's role**

Several factors affect memory functions, and they can either be endogenous or exogenous. Generally, the widely known substances/factors include narcotics, some prescription drugs, alcohol, some biomolecules (most notably glucose, fatty acids, amino acids), environmental factors, genetic and epigenetic factors [6-8, 21, 28]. Among the biomolecules that affect memory formation and retrieval, glucose is widely known and well-studied molecule. Glucose is the main substrate for memory formation and retrieval. Glucose not only provides the energy for memory formation and retrieval, but also, is involved in providing the necessary subunits or components for the formation of various neural components of the "neural data" – memory [9, 11, 12, 14, 21, 29, 30].
