For your height you are not grossly overweight
.Exercises and diet regulation can help u loose 5-6 kg which should be sufficient.I have no idea about the Ayurvedic preparations but if they have been taken with some ones advise they may work.Generally people who loose little weight do not loose breast volume.Some women loose breast volume with age without loosing weight.You wil have to observe, I do not know of any means of stopping the loss.It can be made up if you are surgicaly inclined by Breast implants or breast lift.
Dr Prakash Chhajlani. M.S.,M.Ch.
Cosmetic & Plastic Surgeon.
Ganga Jamuna Apartment,South Tukoganj.
Near Nath Mandir.Indore.452001.India
Tel.O & R. 91-731-2511411/12. R.2366588. Appointments:0731 2511411- 10.30-7 pm