What Four Supplements Do Even The Healthiest Eaters Need?

When it comes to supplements, the best option is to 'do it by diet'.  Sadly, in the state of our current food system that is impossible for all but those with the most money and time.  However, there are four supplements I think EVERYONE should be on.  I can't imagine the reduction in chronic disease...huge! 
This is the flash round!  I'll send the first person to reply correctly 3/4 $10!
Good Luck, I'll post the correct answers soon as someone wins...