Asking for a family member. What is the safest and most effective Supplement to take to help gain lean muscle mass. Preferably something a man can take that is not going to increase BP and not make him skinny. He just needs a little help with getting a little shredded and cut up. He does elliptical a few days a week and lifts weights 5-6 days. Had hip surgery almost a yr and a half ago and lost a lot of weight through running and biking since. Thanks in advance.