Answer:
1800 calories.
Step-by-step explanation:
The balanced diet is the diet that contains the enough amount of carbohydrates, proteins, vitamin, fats, minerals and roughage. This balanced diet is important for all age groups.
According to the RDA (Recommended Dietary Allowance), the minimum calories that must be obtained by 28 years old woman is around 1600 clories per day. The intake of less than this amount of calories might cause fatigue, stress and other health related problems.
Thus, the answer is 1800 calories.