Botulinum toxin is a neurotoxin produced by the bacteria Clostridium Botulinum that has several cosmetic and therapeutic uses. Botulinum toxin A, when injected, blocks the nerve signals that cause muscles to contract. Unlike BT, which is directly used to stop muscle movement, HA fillers are directly injected into the skin to fill wrinkles, depressed, or folded points in the face. It also brings water to the surface of the skin to keep it looking fresh and supple.
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Diagnosis is the identification of the nature and cause of a certain phenomenon. It involves two different types of testing method: in vivo and in vitro diagnostics. In vitro diagnostics (IVD) are the medical tests which are intended to perform diagnoses from sample of body fluids in a controlled environment outside a living organism. In vitro diagnostic (IVD) tests are performed to conduct diagnoses from assays in a test tube, or in a controlled environment outside a living organism.