Do you have any reliable backup for that Mirthandirxiii? I think supplements won’t do shit and people with severe deficits of vitamins are extremely rare, in the west at least. I know bunch of people who take tons of supplements, they aren’t any better (more often worse) in any department, be it the gym the bed etc., than people who don’t take any supplements.
There are people in the world who are literally starving even before they are born, they have illness, shorter body height etc., but theirs penis size is the same than rich populations. You can die for lack of food but your penis will not shrink, neither taking vitamins, proteins, creatine, steroids or whatever will make you gain 1 millimeter faster.