While the olive oil scandal in Europe has slowly trickled down to Singapore ("Is that really extra-virgin olive oil in the bottle?"; Nov 30), this scam is actually not new as it was already reported as far back as 2012.

More worrying, however, is if and when such scams hit the pharmaceutical industry.

The US Food and Drug Administration recently found evidence of altered quality test records in Chinese companies supplying ingredients to pharmaceutical companies.

As some of these drugmakers may have manufacturing facilities in Singapore, it might be prudent for the authorities to look into this as these companies could possibly be procuring some ingredients from China as well.

The possible use of questionable ingredients in drugs is a very worrying issue as it could harm affected patients' health.

I hope the authorities will conduct a thorough investigation into the matter.

Joseph Khoo