You usually get it from food, especially animal products, or from supplements
doi:10.3181/0703-MR-67
For aggressive muscle-building protocols, some do morning + pre-workout + bedtime (this should only be done under medical supervision)

The levels of TUNEL-positive cells, activated Caspase-3/9, and the Bax/Bcl-2 ratio are significantly elevated in the airway epithelium and alveolar epithelial cells of COPD patients ( In vitro models of human bronchial epithelial cells and alveolar epithelial cells treated with cigarette smoke extract (CSE) show upregulation of Fas, FasL, TNF-, and TRAIL expression, accompanied by the activation of initiator Caspase-8, executioner Caspase-3 cleavage, and loss of mitochondrial membrane potential, suggesting a coupling of the typical death receptor pathway with the intrinsic mitochondrial pathway in an extrinsic-mitochondrial amplification manner ( Under physiological conditions, the immunologically silent apoptosis occurring in airway and alveolar epithelium can induce macrophages to produce anti-inflammatory factors such as TGF- and IL-10 through timely efferocytosis, thereby maintaining local tolerance and promoting inflammation resolution

Draw the correct volume of BAC water into a syringe
Chi T, Lin J, Wang M, Zhao Y, Liao Z, Wei P