My son is 17 and has been working out for a year .He was 168 when started and now is 155 with 5% fat.He wants to gain weight for football.He eats very well...turkey,fruit,staek,eggs and eats about 5 to 7 times a day.He is in great shape benching 230 to 240.He takes his protein shake after every work out.He wants a supplement to gain weight and someone suggested NO2.Looking for feedback....