After 30 Minutes
The sodium's not done yet, folks: those 970 milligrams of salt bring on symptoms of dehydration, which closely resemble those of hunger, leading you to believe you need even more Big Mac in your life. To make matters worse, your kidneys are forced to work even harder to process all that salt, and the corresponding heart rate increase leads to higher blood pressure.
After 40 Minutes
Those hunger cravings kick into high gear thanks to your body's inability to regulate blood sugar levels, with the high fructose corn absorbed by your gastrointestinal tract cause insulin spikes.
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.