The bypass is a complex procedure, with an avearge 6 days hospitalization..

The bypass leads to a very important loss of weight.
About 5 kgs per month, during the first 6 months, then weight loss from 2 to 4 kgs per month. It is rather indicated for BMI higher than 45. According to the scientific data, the bypass makes lose - on average - 70% of weight excess after 1 year.

Denutrition and vitamin deficiencies are possible.
An oral supplementation in vitamins and oligo elements is necessary.

The bypass is not an easily reversible procedure.
The re-establishment of the digestive tract is a very complex procedure.

Food comfort is better than with gastroplasty.
Vomiting is rare.

Food practices must be modified:
3 meals and possibly 2 collations.

Sweetened nibbling is rather badly supported.
Because of the '' dumping syndrom '', which is regarded as a benefit by the operated patients.

A regular follow-up by a multi disciplinary team is important.
4 Blood tests are necessary the first year, then 2 blood tests per year, to seek a vitamin deficit.