Calculate recommended daily fiber intake by age and gender based on adequate intake values
General population guidance (Institute of Medicine, 2005). Pregnancy (28 g) and breastfeeding (29 g) have separate values. Increase fiber gradually with plenty of fluid. Not medical advice; people with bowel conditions should follow their clinician's guidance.
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Fiber Calculator is built on published formulas and reference ranges from established health sources. We revisit it periodically as guidance evolves; the "Last reviewed" date above shows when that last happened. If something looks wrong, tell us with the feedback button in the bottom-right corner.