Should a 120-pound 14-year-old boy take weight gaining supplements if he is trying to gain muscle mass and strength decrease body fat percentage?

No, a 120-pound 14-year-old boy should not take weight gaining supplements if he is trying to gain muscle mass and strength while decreasing body fat percentage. Weight gaining supplements are typically high in calories and sugar, which can lead to weight gain, but the weight gained is not muscle mass. Rather, it is fat.

Instead of taking weight gaining supplements, the 14-year-old boy should focus on:

* Eating a balanced diet that includes plenty of protein, fruits, vegetables, and whole grains

* Getting regular exercise, including both cardio and strength training

* Getting enough sleep

* Avoiding alcohol and drugs

* Managing stress

By following these tips, the 14-year-old boy can gain muscle mass and strength while decreasing body fat percentage in a healthy and sustainable way.