I am 71 and have been eating McDonald's since I was 6 or 7. Grew up with the original McDonald's in California. NO health problems other than Idiopathic Pulmonary Fibrosis, which has nothing to do with what one eats.
I have only two real concerns ~ does the product contain wheat, barley or rye gluten ~ those are, to say the least, poisonous to me and 3.54% of the American people. And, I need to know the grams of carbs.
Frankly I can't think of a single health situation where you'd ever need to know calories.