Deficiencies After Bariatric Surgery

Deficiencies After Bariatric Surgery


Bariatric surgery to lose fat is one of the best ways that could be adopted to get rid of excess flab from the body. This medical procedure is highly effective and is a recognized method of successful body fat reduction while keeping the patient fit. Recent studies have revealed that bariatric stomach reduction surgery has reduced heart-related diseases due to weight gain by up to 42% globally. But many patients feel it is difficult to bear the after-surgery effects. Among these problems, nutritional deficiencies are the leading one to consider. 

Bariatric surgery to lose fat makes permanent changes in the digestive system of the patient. These changes develop a lot of micro and macronutrient deficiencies in the patients. These lacks can cause a number of diseases like 

  • Anemia
  • Osteoporosis
  • Protein malnutrition

What Is Bariatric Surgery?

Bariatric surgery to lose weight is a weight loss surgery that is done to make changes to the digestive tract of the patient. Basically, bariatric surgery is the medical procedure that is the last option left for those patients having morbid obesity. 

There are many types of bariatric surgery that are chosen according to the health condition of the patient. This is because not everyone is allowed to have this medical procedure. Also, the person has to take some tests before they are confirmed for the surgery to lose fat. 

While there are many benefits of bariatric surgery, it has some disadvantages as well. These demerits are associated with nutritional deficiencies that cause many health issues to the patients. Let’s get through the possible nutritional deficiencies one by one!

Nutritional Deficiency Issues After Bariatric Surgery To Lose Weight:

Patients going through this medical treatment may have the following complications:


Recent research conducted by the American Society of Hematology has revealed that the risk of anemia is at its peak during the first two years of bariatric surgery. Whatever type of procedure has been adopted, about 33-44% still have to face this issue. Different symptoms of severe anemia are as follows:

  • Severe fatigue 
  • Pallor
  • Dyspnea on exertion

Abnormalities of Bone Metabolism:

Bariatric surgery may lead to bone metabolism complications as well that include:

  • Reduction in mechanical loading of bones
  • Secondary hyperparathyroidism 
  • Nutritional deprivations
  • Fat mass alterations
  • Vitamin D and calcium deficiency

Generally, weight loss through bariatric surgery causes severe Bone Mineral Density (BMD) and increased bone turnover.

Deficiencies of Other Vitamins and Minerals:

It has been noted that after certain bariatric surgery procedures like BPD and RYGB, the serum level of various vitamins such as A, K, and E are decreased. But, the recorded deficiency in the serum level is done through clinical reports and there is no medical proof of the lack found till date. 

  • After bariatric surgery BPD to lose fat, the chance of vitamin A deficiency is recorded within the range of 61-69%
  • Also, low levels of vitamin K have been recorded in 50-60% of patients who have undergone bariatric surgeries

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