For years we've all been saying that spinach has a ton of iron. Why? Because Popeye would eat a can of spinach, build his muscles, and pummel Brutus to save Olive Oyle. The trouble is that spinach only has a small amount of iron but has a large amount of oxalic acid, which inhibits iron uptake, whoops! Find out how the whole mess started and what you can do to actually get more iron in your diet on today's episode.