Do breast implants weigh less than natural breast tissue?

Implants weigh more: Breast tissue has 3 basic components fat, stroma, glandular tissue fat is .9 gper ml saline and gel are .9 & 1.02 g per ml. In large breasts the largest component is fat, the glandular component stays the same. The implant capsule around the implant occupies weight as well so per volume the implants would weigh more if you compare an augmented breast vs a large breast of the same volume.

Implant Weight: Depends of how fibrous the breast tissue in question is. In general, breast tissue is mostly fat tissue. Fat in general is less dense and will float when placed in water. Saline breast implants are mainly salt water. A gallon of fat will have an approximate weight of 7.39 lbs, a gallon of salt water will have a weight of 8.35 lbs and a gallon of silicone will have an approximate weight of 19 lb.

Usually weigh more: This depends on the fat content of the breast. But for a given volume saline and silicone are more dense and therefore weigh more than breast tissue.

It depends: Some women have very dense, heavy breast tissue, so an implant may be the same or lighter than the native tissue. Other women have light tissue.