i just joined the this group and i keep seeing 13 year olds ask this question. your weight and age together may have mattered as a newborn, but there are many other factor when deciding if you should lose weight. (Though I am only 14 myself, i hope you consider these things) 1) how tall are you? though many times proven not a good way to measure health (it isnt) a quick and easy way to make sure you weight is safe is your BMI. 2)if your BMI is "overweight " but you know your healthy, this may be because of muscle mass. do you weightlift? i do. my doctor says im healthy but the chart says otherwise which brings me to my next point. 3)ask your doctor!!!!