Whole grains contain the entire kernel of the grain, including the bran, germ, and endosperm, which means they are higher in fiber, nutrients, and antioxidants. Refined grains, on the other hand, have been processed to remove the bran and germ, resulting in a smoother texture but a loss of important nutrients. This process often reduces fiber content, which is essential for digestive health. Whole grains support weight management, lower cholesterol levels, and reduce the risk of chronic diseases like diabetes and heart disease. Choosing whole grains is crucial for a balanced diet and overall health.