Carbohydrates are the primary source of energy for the body, as they are broken down into glucose during digestion. Glucose is then transported to cells, where it undergoes glycolysis and the citric acid cycle to generate adenosine triphosphate (ATP), the body’s main energy currency. Complex carbohydrates, such as whole grains and vegetables, provide sustained energy due to their slower digestion rates compared to simple sugars.
Proteins also contribute to energy production, though their primary role is tissue repair and maintenance. When carbohydrates are insufficient, the body can metabolize amino acids from proteins into glucose through gluconeogenesis, a process known as glucogenesis. However, excessive protein intake for energy can strain the kidneys and liver.
Fats, particularly unsaturated fats, serve as a concentrated energy reserve. They are broken down into fatty acids, which enter the mitochondria and undergo beta-oxidation to produce ATP. Omega-3 and omega-6 fatty acids also support mitochondrial function and reduce oxidative stress, which can impair energy metabolism.
Vitamins and minerals are cofactors in energy-producing pathways. B vitamins, including thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), and biotin (B7), are crucial for converting carbohydrates, fats, and proteins into ATP. Minerals like magnesium, iron, and cobalt also facilitate enzymatic reactions in energy metabolism. Deficiencies in these nutrients can lead to fatigue, weakness, and metabolic inefficiencies.