Real talk, you can use supplements if you want to....
...even if it's a protein shake, it's almost necessary for you to obtain some type of supps because you normally don't get what you need just inyour regular diet.
But in the end, you really don't NEED anything more than just a multi-vitamin, protein, and maybe flaxseed oil. That's all.
Creatine, NO, etc. is all just extra...but it DOES pay-off. Someone on creatine and NO normally makes bigger gains and makes those gains faster than someoneNOT on it....
...but when you get off of it, you do lose a good amount of what you gained, so there's definitely a trade-off.