68K views · 236 reactions | THE GRAND BIG MAC has taken the internet by storm today - But just HOW much bigger is it? The new Grand Big Mac has 741 calories according to McDonald's - That's 45% MORE than a standard Big Mac... Add your fries and a milkshake and your meal could be over 1600 Calories.. With the current level of obesity - Is it morally right for McDonalds (Who have worked really hard creating healthier alternatives) to offer meals with THAT many calories? | MuscleFood | Facebook