At most you question why it might be, give them an example of your weekly diet and activity and see if the point out a huge flaw.  You still buy the suppliments, but also rectify the flaw and maybe you can fix it so the suppliments are not needed. But, fats already think they know more about health than both Drs and 'alternative medicine gurus' combined, so they go for the attention and the victim bucks they get to cash in on tumblr with their embellished stories.