What is the main source of dietary fiber?

Fruits and vegetables are recognized as the main source of dietary fiber due to their rich content of both soluble and insoluble fiber. This fiber plays a crucial role in digestive health, helping to maintain regular bowel movements and prevent constipation. Soluble fiber, found in foods like apples and oats, can help lower cholesterol levels, while insoluble fiber, prevalent in foods like carrots and leafy greens, aids in digestion and promotes a feeling of fullness.

Fruits and vegetables naturally contain high amounts of vitamins, minerals, and antioxidants, in addition to fiber, making them essential components of a healthy diet. Foods like whole grains and legumes also provide significant fiber but are not included in the correct choice, which specifically highlights fruits and vegetables.

In contrast, protein-rich foods, processed foods, and meat products typically offer minimal to no dietary fiber. Most sources of animal protein lack fiber altogether, while processed foods often have their fiber content stripped away during manufacturing. This emphasizes the importance of choosing whole, plant-based foods to meet our dietary fiber needs effectively.