The admission by tennis star Maria Sharapova that she has tested positive for the banned drug meldonium offers its share of ironies.

Sharapova – the world’s most financially successful female athlete – has always benefited both by her talent and her looks.

But what looks good on the outside is not necessarily healthy on the inside. Sharapova – a Russian who trains in the U.S. – has a history of irregular EKGs and a family history of diabetes. There are conflicting reports about whether the drug, also known as mildronate, can actually alleviate those conditions. Its reputation as a performance enhancer stems from its ability to increase blood flow. ...

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