Furthermore, up to 40% of patients drop out, despite having funding agreed, when they have the procedure and the potential complications of bariatric surgery explained.
Hefyd, mae hyd at 40% o gleifion yn peidio â mynd ymlaen, er y cytunwyd i ariannu eu triniaeth, ar ôl i fanylion a chymhlethdodau posibl llawdriniaeth fariatrig gael eu hesbonio iddynt.