In this post, Mom Junction talks about the importance of a healthy and balanced Weight Loss Plans for Teen Girls. Any diet that contradicts these points could be considered unhealthy. If a Diet Plan for Weight Loss is restricting certain food groups such as carbohydrates or fats, it could be unhealthy as the body needs all of this but in moderation. So, it is not advised to follow unhealthy diet plans to reduce weight or to increase muscle growth in short periods of time.