After 60 Minutes
Even once your body's normalized from the past hour's indulgence, your body can take upwards of three days to completely digest the burger due to its overwhelming greasiness.
Before you swear off Big Macs forever, consider this: Yahoo Health showed the infographic's timeline to two nutritionists, and while they did confirm a lot of the findings, they spotted a few admitted exaggerations. While abnormal blood sugar and dehydration levels can definitely result from eating a Big Mac, the severity of those effects vary widely from person to person.
Ultimately, though it's hardly a one-size-fits-all road map for health, the infographic should at least wake you up to what you already should've known from the get-go: Big Macs (and really all fast food) should be more of a once-in-a-while treat than a staple of your weekly meal plan.