For today’s Dear Mark, we’ve got a three-parter. First up, I discuss the latest study claiming that red meat will kill us all. Or maybe it’ll be killing roughly half of us all, seeing as how this paper concerns red meat and women’s breast cancer risk. Next, I give my position on the “net carbs” issue. Do we subtract fiber, leave it as is, or do something else entirely? And finally, I talk a lot about the importance of getting enough sunlight. But what happens when getting enough sun isn’t the problem? What can an outdoor worker do about too much sun?