Our family has been into fitness through weight lifting and exercise for over 40 years. Being into weight lifting for this long means that the person has to be well versed in the do's and don'ts of lifting weights. They have to have certain knowledge of vitamins, diet and supplements, as far as what is good or not good. With two family members into weight-lifting they are a professional source for any author, relating helpful hints to the beginner, intermediate or advanced weight lifter. They say that experience brings a wealth of wisdom.