A double chin is merely an excess of fat in the submental space (the area underneath the chin). This submental fat may accumulate for a number of reasons. Those with a family history of sagging skin or stubborn fat are more likely to develop a double chin.

A double chin, also known as submental fat, is a common condition that occurs when a layer of fat forms below your chin.

hyaluronic acid doesn’t come in pure form—it comes in solution form.It comes to be 1% to 2% of the solution, which is primarily composed of water..

Devolux PLLA ( Poly-L-lactic acid )，PLLA stimulates the body's collagen regeneration. It is regenerative medicine.

Hyaluronic acid, also known as uronic acid, is a substance that occurs naturally in skin tissue. In nature, it is widely found in the connective tissue, mucous tissue, eyeball lens and the capsule of some bacteria.