Most research that's done here is to argue with someone else, and a lot of it is done on the spot. Like I mentioned, and you rebutted, most supplements are a waste of money, UNLESS they are needed because of a deficiency. There is NO substitute for a healthy, varied diet. If you cannot eat such, you are cutting corners and trying to replace what you aren't eating with a pill, which yes, helps, but again, isn't a substitute for the food. Some people have certain conditions which warrant supplement use, and a lot of them are because they didn't follow a healthy lifestyle originally. I have been weight training for 48 years, and have always followed a healthy diet to this day, and have supplemented with some things just to see if I could increase strength. I have always eaten a healthy, varied diet, and have had no signs of deficiencies whatsoever. I have been certified as a trainer, with nutritional classes, four times. Nothing has changed in decades as far as what a healthy diet is, besides fads that are temporary fixes, and don't work in the long run. Again, unless you have a deficiency caused by a disease or genetically, taking multivitamins are not a substitute for a healthy diet, which everyone besides the very poor can afford. If you aren't working all day long, you always have time to eat healthy, and can make things in advance, and buy healthy most everywhere. Also, a lot of links people provide, just to argue without prior knowledge, are just other's opinions and not based on facts or studies.