25 grams for women and 38 grams for men
The average adult only eats 15 grams of fiber per day. Women need 25 grams of fiber per day, and men need 38 grams per day, according to the Institute of Medicine. Eating more plant foods -- vegetables, beans, fruit, whole grains, and nuts -- is the best way and is one of the major recommendations from the U.S. government's 2010 Dietary Guidelines. For example, if you require 2,000 calories per day for healthy weight maintenance you should consume 28 grams of fiber each day, and if you need 3,000 calories you should eat 42 grams of fiber every day. It is ideal to get your fiber from a well-balanced diet containing plenty of fiber-rich foods. For example, eat 38 grams of fiber each day if you’re a man ages 19 to 50, 30 grams per day if you’re a man age 50 or older, 25 grams if you’re a woman ages 19 to 50, 21 grams if you’re a woman age 50 or older, 28 grams if you’re pregnant and at least 29 grams of fiber each day if you’re breastfeeding. 1 The NFC recommends 32 grams of fiber for a healthy adult (Dr. 2  James Anderson, professor of Medicine and Clinical Nutrition and NFC chair). 3  According to Columbia University Institute of Human Nutrition, the average American barely consumes half of the recommended amount of fiber needed per day (10-15). These total fiber requirements provided by the Institute of Medicine are 21 grams per day for women ages 50 and older, 25 grams for women younger than age 51, 30 grams for men ages 50 and older and 38 grams of total fiber per day for men younger than age 51. A: The amount you need is tied to the number of calories you eat in a day. For healthy adults, the USDA recommends 14 grams of fiber for every 1,000 calories consumed. So a person eating 2,000 calories a day should aim to get 28 grams of fiber daily. For children ages 3 to 5 years of age, the average fiber intake is about 11 grams per day. For children 6 to 11 years the average fiber intake is about 13 grams per day. That is 50% less than what they need! Kids do not get the needed amounts of fruit, vegetables and whole grains, which leads to poor fiber intake.
http://www.webmd.com/diet/guide/fiber-how-much-do-you-need http://healthyeating.sfgate.com/calculate-much-fiber-one-needs-day-4814.html http://healthyeating.sfgate.com/calculate-much-fiber-one-needs-day-4814.html http://www.nationalfibercouncil.org/af_are.shtml http://healthyeating.sfgate.com/many-grams-soluble-fiber-per-day-8084.html http://www.vegetariantimes.com/article/ask-the-nutritionist-how-much-fiber-do-i-really-need/ http://www.superkidsnutrition.com/mt_howmuchfiber/
required amount of fiber per day