The Lap band procedure has been FDA approved for adults since 2001, but is currently not approved for patients less than 18 years of age. This procedure is the least invasive of the purely restrictive bariatric surgery procedures, and the stomach is not cut or stapled. The procedure is also completely reversible.
The gastric bypass is more risky than the Lap band, but has fewer risks in adolescents than adults.
There are few data about the sleeve gastrectomy, but it is thought to be less risky than the bypass, but more so than the Lap band.