Without fiber, fruit or vegetable juices can raise blood glucose levels and may increase the risk of health issues. A study reveals that juice-only diets, even for a short duration, can negatively impact gut and oral bacteria, causing inflammation and gut permeability. Whole foods, however, showed more beneficial microbial shifts, highlighting the importance of fiber. Without fiber, fruit or vegetable juices can raise blood glucose levels and may increase the risk of health issues. A study reveals that juice-only diets, even for a short duration, can negatively impact gut and oral bacteria, causing inflammation and gut permeability. Whole foods, however, showed more beneficial microbial shifts, highlighting the importance of fiber. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle