Because it is flexible. Think about it; the ribs protect both the lungs and the heart. If the ribs were solid bone all the way around then unless you constantly break your ribs you wouldn't be able to expand the cheat to breath. Additionally your lungs would constrict the heart to a degree that it would function properly.
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Answer:
Assuming you're asking everyone on here--no right or wrong answers;
I recently purchased an immune-boosting powder. I didn't compare any products similar because the brand I purchased seemed to be the most popular one on the market / best-reviewed.
To be more health-literate for future purposes, it's a good idea to read the ingredients and do research!! Despite how highly-rated an item may be, it's almost always beneficial to know what you're putting into your body beforehand.
