Group 1: Surgical procedures that target digestion. The gastrointestinal tract – and therefore the passageway for food – is shortened, so that less food is digested. These are serious procedures that cannot be reversed.
Group 2: Surgical procedures that limit the intake of food. One of these is gastric banding, which became very popular in many countries throughout the world in the 90’s.
Group 3: Surgical procedures that combine both the first two groups. The intake of food is restricted and the passage of food shortenend. This is a serious, non-reversible type of surgery.