With high cholesterol, 40 to 50 grams.
After 2-3 days, increase to 1 teaspoon of ground flax a day. Continue this to the goal of 2 teaspoons ground flaxseed daily. (~greater than 6y/o or 50-100 pounds; if greater than 100lbs work up to adult dose). Start with 1 teaspoon of ground flax seed a day. Drink 8-10 cups of fluids (preferably water)of ground flaxseed a day. After 2-3 days, increase to 2 teaspoons of ground flax a day. Continue this to the goal of 2-4 teaspoons of ground flax  The University of Maryland Medical Center recommends adults consume 1 tablespoon of ground flaxseed two to three times a day, or 2 to 4 tablespoons once per day. There is no set dose of flaxseed. In studies of people with high cholesterol, 40 to 50 grams of flaxseed per day has been used; 15 grams for improving kidney function in people with lupus; 40 grams for mild menopause symptoms. Flaxseed must be ground prior to ingestion or it won’t work for these conditions. After 2-3 days, increase to 2 Tablespoons ground flax a day. Continue this to the goal of 2-4 Tablespoons ground flaxseed a day. -Recommendations from professionals vary from 2-4 Tablespoons of ground flax seed. I know many people who eat regularly 2-4 Tablespoons of ground flax daily.
http://www.ellies-whole-grains.com/how-much-flaxseed.html http://www.livestrong.com/article/428116-flax-seeds-how-much-per-day/ http://www.webmd.com/vitamins-and-supplements/lifestyle-guide-11/supplement-guide-flaxseed-oil http://www.ellies-whole-grains.com/how-much-flaxseed.html
how much flaxseed per day