Hello dr.i have a knee problem,my right knee joint gap is decreased,previously i used to take orcerin-gm, but no use ,still my gap not increased?

Biomechanics: Closure of one knee compartment might be due to cartiledge wear, but might also be due to genu valgus or varus. Slight supination or pronation of the foot might be corrective.

Can't grow cartilage: There are no oral supplements, Over the Counter or Prescription, that will cause your articular cartilage to regrow. This is what gives you the "gap" on X-Rays. Many of them however do help relieve pain.