After an initial discussion on the subject of "Low Carbing", If my friends are interested or are in need of following this way of eating, then I give them a copy of Protein Power, if they are clearly diabetic or pre diabetic I give them a copy of Dr Bernstein" Diabetes Solution.
I get them from half dot com and consider it a small investment to potentially prolong the life of my friends....
If the program takes root with them then I help, if not then that is the end of the discussion.
Usually it takes, especially as they find all of the other benefits to their health ie no indigestion, no sleepiness, more energy less infections etc etc