For today’s edition of Dear Mark, I’m answering three questions from readers. First up, a Forbes columnist recently penned an anti-organic agriculture screed. In it, he makes the oft-repeated claim that organic is just a scam and really no different from conventional produce. Is he saying anything new — or useful? Should we avoid the often higher price tag of organic produce? The second comes from Susan, a healthy and active 70 year-old without any complaints — except that a midday nap is starting to sound more and more attractive every day. Could her low salt intake be the cause of her midday fatigue? Maybe. Next, what’s my take on Weston A. Price? How do his nutritional guidelines jibe with the Primal Blueprint?