When trying to figure out what "supplements" to take, you should always do your research and think critically about said research. In the health and fitness industry, there are two sides of the coin. First, there is a ridiculous amount of supplements available out there with a wide range of price, efficacy, and effect. Second, almost none of these supplements are FDA approved (which doesn't really mean much on its own), and the majority of them have little to no research to back them up. Supplement industries thrive on the ignorance of their buyers and utilize the "sexiness" of new supplements and the labeling of these supplements.
A prime example of this is creatine. Creatine monohydrate is likely one of the most researched ergogenic supplements on the planet. I underlined monohydrate because that is the type of creatine that has received the most researched and the type that has been shown to have the most efficacy. What's the problem then? It just isn't sexy anymore. That sounds ridiculous, but is the truth. You can go on amazon right now and buy 2.2 lbs of creapure creatine monohydrate for roughly $20, take 5 grams a day (after you have appropriately saturated your muscle with it), and experience the ergogenic effects that you hope to. However, for some odd reason, everyone has to turn to the products which are double priced with a fraction of the servings because bodybuilding.com endorses it. Don't be that kind of athlete, and certainly don't try to bring others down with you.
The bottom line. Just because a supplement is "basic" doesn't mean that you should discount it, and just because bodybuilding.com says it's the best thing since sliced bread doesn't mean you should take it either. In fact, all too often, these basic supplements are the cheapest and most effective. When considering a supplement, it would benefit you to do your research, find out what the PRO-SCIENTIFIC consensus is, and then after that, think critically and decide for yourself. Consider all of the variables and then decide for yourself if the supplement will positively benefit you, but do so after real research confirms that there is a high likelihood you will experience the benefits. Don't waste your time and money just because one person with a PhD says you should.