Unit of the daily recommended amount of calories

Question

Average calories required for a man are 2000 to 2200.

Is the unit calories, or kilo-calories (sometimes also called Calories)?

Answer 1

That figure is in kilocalories. A human needs about 2000 kilocalories per day.

Sometimes a kilocalorie is described as a "big calories or a "Calorie", but to me that's more confusing than helpful.