Eating alot of protein alone helps build muscle, im 16, and were teenagers so wer still growin, so say u dont workout, but u eat tons of protein, ur still gonna build muscle because the protein in itself is good for ur muscles and thats what muscles are built up from,So yea they will still help, but u have to workout to actuallly become really muscular and strong lol. Most people our age dont even get the right nutrition, thats why there all 100 pound scronny weak kids lol. 150 isent that bad for 6"1, its thin, but im guessing ur not super scronny or anything, honestly tho man protein bars are a waste of money,they got like 20-30grams of protein in them, just get a weight gainer if ur lookin to gain weight, they got like 60grams of protein in one serving, they taste like milkshakes and they will help u gain weight alot faster, but watch out, if u take them too much ur get fat, because there not normal protein shakes, they got high amount of fat in them to help ppl gain, but if u workout and take them ull be fine. And also if ur trying to gain weight dont do any cardio, stop fo awhile intil u gain what u want, just still to weightlifting and no cardio.
Go to
www.bodybuilding.com and look at there supplement section, they got everything there, ur have a wide selection of things to look at that will help u gain weight, they also got protein bars if u still want to get those, they sell them cheap there so ur get a good deal on them, but in stores there like 2-4 dollars for one bar(atleast here they are) and i think thats a rip, u can get a hole box on this site for like 10-15 bucks. Heres some articles that talk about good ways to gain weight and stuff
http://www.bodybuilding.com/fun/bbinfo.php?page=MassGainDiets Heres some other sites that might help
http://www.gnc.com/sm-sports-nutrition-nitric-oxide-weight-gainers--fi-2108309_cp-2102347.html http://www.nutritionalsupplements.com/indexwg.html http://www.bodybuildingforyou.com/protein/champion-nutrition-heavy-weight-gainer-900.htm these are just sites showing different types of weight gainers and talks about them.