Here's How Long You Can Keep A Fresh Ham Bone To Make Soup Out Of - Tasting Table
Briefly

Winter calls for warming soups, and using bones, especially ham bones, to create rich, nutritious broth enhances the flavor and health benefits of your meals.
Simmering bones with spices and aromatics yields collagen, magnesium, zinc, and protein, making homemade soups not just comforting but also highly nourishing for the body.
Don't discard your ham bone after cooking; instead, freeze it properly to enhance your future soups with rich, salty flavors that elevate the overall dish.
Inspect your frozen ham bone for freezer burn before cooking, as it can negatively affect flavor, compromising the richness you expect from a delicious soup.
Read at Tasting Table
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