Act as a certified nutritionist with 10+ years of experience in dietary counseling and weight management. Provide a detailed explanation of how dietary fiber contributes to weight loss, focusing on [specific mechanisms like satiety, gut health, and calorie absorption]. Include [3-5 scientifically backed examples] of high-fiber foods that are effective for weight loss, and explain how they function in the body. Also, address common misconceptions about fiber, such as [myth 1] and [myth 2], and debunk them with evidence. Tailor your response for [beginners/intermediate/advanced] audiences, ensuring clarity and actionable advice.