I recently learned from the news that there has been an increase in the number of individuals diagnosed with "metabolic syndrome" due to issues related to visceral fat, even though they appear thin.
こんにちは！
ご質問ありがとうございます。
ご質問について、いくつか言い方が考えられますが、例えば、
I recently learned from the news that there has been an increase in the number of individuals diagnosed with "metabolic syndrome" due to issues related to visceral fat, even though they appear thin.
とすると、『私は最近ニュースで痩せているのに内臓脂肪の問題などで[メタボ](https://eikaiwa.dmm.com/uknow/questions/26379/)であると診断される人が増えていると知りました。』と言えます。
参考になれば幸いです。
日本 
