Q: I’ve heard that raw spinach has an enzyme in it that cannot be broken down by the body and can be a problem if you eat too much of this vegetable. Is this true?
– John from The Netherlands

A: No. There is no indestructible enzyme in spinach, or any edible leafy vegetable for that matter. In contrast, spinach is an excellent source of the B vitamin folic acid, which lowers risk for birth defects, cancer, and heart disease. It also is a great source of iron, calcium, and other trace minerals. Most adults eat far too few dark green leafy vegetables and would benefit by doubling or even tripling their current intake of these nutritious foods. -Elizabeth Somer