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I was diagnosed with Fructose Malabsorption and have been diet compliant for over a year. My weight has fluctuated from day to day, but now I am rapidly putting on weight – no matter how much I limit my food. I only eat eggs, chicken, plain unsweetened whey protein, white rice, spinach, white potato, lettuce, snow peas, snap beans, grits, butter, oatmeal, olive oil, plain popcorn, pumpkin seeds, peanut butter (limit of 1 TBSP/day), Trader Joe’s O’s cereal. Water is my only beverage. I have tried Peptamen Plain, hoping for a food substitute but get severe abdominal pain after only 1/2 a serving.
So here’s my question: What mechanism can make someone with a malabsorption disorder GAIN weight, even if very little food is eaten? I really need help. Thank you

1 Comment on this article

  • Dr. Chris January 9, 2011

    The weight gain may not have anything to do with your malabsorption syndrome but rather be a consequence of your diet. Even small portions of high calorie foods, especially foods which have a high glycemic index, will make you gain weight especially if the total calorie intake is greater than your calorie output (physical activity) in a day. This is just one possibility. You still have to consider other factors like hypothyroidism and so on. You need to see a doctor who can conduct the relevant tests and exclude other conditions that may be causing this weight gain.


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