SINGAPORE – Thirteen-year-old Kayden Soh must follow a strict diet – no fruit, no milk, and no candy – because his liver cannot process sugar. He also drinks plenty of cornstarch water.

He mixes about a teaspoon of uncooked cornstarch with water and drinks the concoction every few hours, even in the middle of the night.

Without it, he could have dangerously low blood sugar, which is life-threatening.