I am no guru in supplements but i do know what i am talking about. I have tried everything you can think of (no roids, only bitches use roids) and i can tell you what works. But tell me whaat works for you, maybe there is somehting new i don't know of.
----For MAINTENANCE (in season) i prefer Optimum Nutrition Vanilla flavor (always mix with skim milk, tastes great??)
----For BEST GAINS (offseason) I would definitely say the NITRO-TECH HARDCORE is the best possible option. I gained 9 SOLID pounds in two months and never lost it. But i must warn you that it tastes horrible, but if you can stomach it, it is freaking amazing! Plus you get the added benefit of 2 products in one, because it has very potent/well absorbed creatine in it. If you can choke this stuff down, you will get everything you pay for.
--For overall taste i would go with either chocolate Muscle Milk, or Chocolate Syntha 6
------Hands down It has to be PURPLE-K by Fusion Bodybuilding. It is called the "King of Creatine" for a reason, and it has earned it. It is absorbed into the muscle like you would not believe and it comes in capsules, that you take pre-workout, no loading or that crap. And you only have to take one or two capsules pre-workout.
--Nothing else stands a chance against Purple- K
----SuperPump 250 by Gaspari Nutriton. Its tough on the tummy, but your an animal in the gym ( i dont use these anymore, my Adderall makes me an animal in the gym, i guess thats a good side effect, lol)
----Nano Vapor by Muscle Tech, slightly overpriced, but you will see results. Of course, this is even toughher on your stomach, and may cause you to have to run to the bathroom mid workout, so i only recommend these to the older crowd with iron guts.
---Plain old L-ARGININE----dont waste $50 on some stupid supplement that says you will have "insane vascularity", you know why?? It is only L-Arginine with other substances that do more harm than good. For example, those supplements are loaded with enough L-Arginine to pump your muscles, but they are also loaded with caffeine, which as you may know, CONSTRICTS your blood vessels.
----Guys, real "prohormones" are illegal, dont bother.
-----If you really want to boost your testosterone try Optimum Nutrition ZMA(zinc-magnesium-B6) . It will only boost by 30% , which is not great, but its decent, and it will also improve you REM sleep.
-----If you also want to block your estrogen (which also boosts test.) than you need NO supplements, all you need to do is eat 2 cups of RAW BROCCOLI. Something in the broccoli, i cannot remember what it is called, blocks estrogen to a certain extent, and i have seen great improvements in workouts.
---its banned in baseball, dont even try.
----the boosters DO NOT WORK, again dont waste your money.
-----The best "Multi" is by far ANIMAL PAK by Universal Nutrition. It is expensive, and there are many capsules to take (i believe it is about 7 or 8 capsules per "vitamin") It will give you muscle gains (yes, muscle gains from a multi) and you will also notice some fat loss, due to increased muscle mass and more intense workouts (I did)
------If you cant afford it, or have overprotective parents, just go with Centrum, it will not do anything for your workout compared ANIMAL PAK, but you should be taking one anyway, since your an athlete (DUH!)
FAT LOSS PRODUCT:::::
-----CLA (Tonalin CLA is best). CLA will give you fat loss, but it will not be fast. You will need to shell out some cash so you can take it for at least...hmmm, i would say 3 to 5 months (a year if you can afford it) and you will notice some pretty impressive fat loss ( i got the most fat loss around the mid-section). ---I took CLA for 12 months exactly, and i dropped from 21% body fat ( i was somewhat chubby as a junior in high school) to 13% body fat. THis came mostly from teh CLA, but i also worked my a$$ to the bone 5 to 6 days a week, doing full body workouts (none of this one day legs, next day arms crap) and tons and tons of cardio ( my friend and I ran for and hour, biked for an hour, and swam laps for a half hour).
----Stay away from things like Hydroxycut Hardcore, it will do nothing but cause you to have some serious stomach/digestive tract issues. Stay away from stimulant containing "fat burners", they do not work, the tv ads lie!!! (and since ephedra and Clenbuterol are illegal, you will see no loss from these products)
PURE MASS BUILDERS(gainers):::::(these are just my opinion in best overall mass builders, strictly for those trying to put on weight, this weight will be muscle/fat):::::
-----MASS-TECH by muscle tech. I did not personally use it, but i witnessed a real transformation of a few close friends and teammates who did use it. I was told it tasted....not so great, but worked rly well. (ssomthing like 15 to 20 'semi-solid' pounds.
-----RUSSIAN BEAR 5000, i do not know who makes it, but i know that you will gain some serious weight. I would not recommend this to anyone who is not well 'underweight'. It is high in fats, carbs, extremely high in protein, and obviously from the name, very high in calories.
I did not list all things, so seriously, if you have any questions, please feel free to ask, on the board, or by private message.