16,17 The Preiss-Handler pathway can convert dietary NA to NAMN by NAPRT
It participates in pathways related to cellular energy production, neurological communication, and healthy blood cell development
Negative regulators of JAKSTAT signaling can be grouped into three main families, and this includes the suppressor of cytokine signaling (SOCS) protein family, protein tyrosine phosphatase (PTP), and protein inhibitor of activated STAT (PIAS)
Resources (e.g., nutrients, energy, antioxidants) are limited, thus allocation of a key resource to one trait, such as resistance against viral infection, means that less can be allocated to other functions that might be important in terms of Darwinian fitness (e.g., fertility)