What method is not used to assess a healthful body weight?

One method that is not used to assess a healthful body weight is the use of Astrology or horoscope readings. Assessing a healthful body weight typically involves scientific methods such as Body Mass Index (BMI), waist circumference measurements, and body composition analysis. These methods provide objective data on an individual's weight in relation to their height and overall body fat, rather than subjective interpretations from astrology.