– Why do doctors care so much about your BMI when it’s has been proven to be such a flawed metric for ones actual health?
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The people for whom BMI is inaccurate (bodybuilders, extremely tall people) know who they are and their doctors know who they are. For everyone else, it’s a great first pass indicator on whether we need to lose, gain, or maintain weight and how urgently we need to do it.
Activist types insisting that these edge cases make it useless are attempting to muddy the waters around BMI to make it seem like we don’t have a very clear picture of what constitutes excess weight and how bad it is for our health. They do this because they believe combatting social stigma is a more urgent concern than the effects of weight itself.
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