Our Verdict
When comparing spinach to kale, we picked the spinach.
Why?
In terms of macros, spinach and kale are very similar. They are mostly water wrapped in fiber, with very small amounts of carbohydrates and protein and trace amounts of fat.
Spinach has a lot more vitamins and minerals—a wider variety, and in most cases, more of them.
Kale is notably higher in vitamin C, though. Everything else, spinach is higher or close to equal.
Spinach is especially notably a lot higher in B vitamins, as well as iron, calcium, magnesium, and zinc.
One downside to spinach, though, which is that it’s high in oxalates, which can increase the risk of kidney stones. If your kidneys are in good health and you eat spinach in moderation, this is not a problem for most people—but if your kidneys aren’t in good health (or you are, for whatever reason, consuming Popeye levels of spinach), you might consider switching to kale.
While spinach swept the board in most categories, kale remains a very good option too, and a diet diverse in many kinds of plants is usually best.
Want to learn more?
Spinach and kale are very both good sources of carotenoids; check out:
Enjoy!
