A healthy lifestyle and balanced diet are paramount for maintaining good health; as the adage goes, “health is wealth,” and prevention is preferable to cure. Numerous global studies highlight the significant role of dietary fibers (DFs) and complex carbohydrates in human health. Thus, enriching one’s diet with these elements becomes essential in safeguarding against various lifestyle-oriented diseases such as obesity, cardiovascular disease, diabetes, hypertension, constipation, and cancer. However, dietary fiber (DF) is a multifaceted dietary component comprising various nondigestible food constituents. Its physiological effects are closely tied to its physicochemical and functional properties. Different methods of obtaining DF from various sources result in distinct behaviors during gastrointestinal transit, influenced by their chemical composition and physicochemical characteristics. Complex carbohydrates, resistant to small intestine digestion, undergo bacterial fermentation in the large intestine. Consequently, DFs include complex carbohydrates, contributing to overall dietary complexity.