Yet on the whole, the niacin flush is associated with beneficial health effects. Niacin specifically activates the high affinity G-protein coupled receptors, GPR109a and b, which then leads to release of a variety of prostaglandins that results in the flush response.
professional courtesy is something to be given by the off duty officer to an on duty officer not the other way around a working cop may use discretion on minor violations without fear of repercussions this consideration is extended to citizens and certainly can also be extended to off duty cops
that said if one is going to observe professional courtesy one still has to draw a line that no one can cross i ve never extended professional courtesy on drunk driving for example that s a much lower line than a lot of guys draw but drunk driving is a particular bete noire of mine and professional courtesy if it s limited to minor traffic violations isn t any worse than perks received by members of any other profession