Bra fat, also known as "back bulge" or "under bra roll" is a common concern for many people. There are several modern non-invasive treatments that have been developed to help reduce bra fat. Some of these include:

Cool Sculpting: this is a non-surgical procedure that uses controlled cooling to freeze and eliminate fat cells. It can be used to target specific areas, such as bra fat.

Ultrasound-assisted liposuction: this is a minimally invasive procedure that uses ultrasonic energy to break up and remove fat cells. It is less invasive than traditional liposuction and can target specific areas, such as bra fat.
Sculpsure: This is a non-invasive laser-based treatment that is FDA-approved to destroy fat cells. It uses heat to destroy the fat cells, and it can be used to target specific areas, such as the bra fat.

Radiofrequency (rf) treatment: this is a non-invasive procedure that uses radio frequency energy to heat the skin and underlying fat. It can target specific areas, such as bra fat.

Lipo massage: this is a non-surgical, non-invasive procedure that uses a device to massage the skin and underlying fat to help smooth out and tone the area.
Fat-soluble injections refer to the use of substances that can dissolve or break down fat, which can then be eliminated from the body through natural metabolic processes. These substances are typically injected directly into the target area, an example of a fat-soluble injection is deoxycholic acid, it is a naturally occurring bile acid that is FDA-approved for the treatment of moderate to severe submental fat (double chin).