Question

A young woman presents at the clinic six weeks after a gastric bypass surgery. She had more than 100 lbs. to lose and so far, has lost 40 lbs. She expected to gain some strength and begin exercising, but she is very weak. She states that at times she is too weak to even comb her hair. She eats small meals several times a day, but has watery diarrhea and is nauseated much of the time. She is losing her hair and is very discouraged. Explain how gastric bypass affects your ability to absorb and use nutrients. Include in your answer specific facts, data, examples,

Answer 1

In the gastric bypass surgery the entire nutrient absorption normally taking place in the upper intestines, in the duodenum, no longer happens.

Because the duodenum is very active in the absorption of vitamins and minerals, bypassing this section of the intestines can lead to deficiencies.

Most common are vitamin B12, folate, zinc, iron, copper, calcium and vitamin D. These are all important in various physical process and deficiencies can lead to serious complications.

It reduces the ability to absorb nutrients and calories from food.

Absorbing fewer calories makes it easier to lose weight.

gastric dumping is a common disorder seen followed by gastic bypass . example, in gastric bypass patients food passes too quickly from the gastric pouch into the intestines. Overloading the upper intestine may cause nausea, cramping, diarrhea, dizziness and fatigue.  

Protein and calorie deficits can result from the gastric bypass.