Unless you are intent on making your own maple syrup, you probably haven't given tree sap much thought. So, let's take a deeper dive into a tree's 'blood' or sap and the normal flow in the fall for ...
Everyday Health on MSN
Tree Sap: What It Is and Whether You Should Eat It
Sap is the sticky substance you see oozing out of tree trunks, and many varieties are edible. Here's what to know about eating sap, plus the risks and benefits.
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