I am 30 and want to loose 5 kgs in one month.what's the single best way?

A balanced approach-: I would suggest to limit weight loss to 2 lbs/week.You don't want to starve yourself!instead, focus on making the right food choices (fruits, vegetables, whole grains, lean meats), avoid processed sugars, saturated fats and soft drinks;try smaller portions, more frequent feedings to suppress the low blood sugar and hunger pangs brought on by insulin, and 30 min of physical activity a day!best wishes!