How does chirality affect humans?
Well, are you ambidextrous....?
Can you drive on EITHER side of the road in your country...?
Do your boots fit on either foot?
Less prosaically, most of the drugs that we take for various conditions are HANDED, and a single diastereomer is the one that is biologically active. Some time in the manufacture of the drug, it would have undergone a resolution that separated the isomers...