Until one day, I happened to read the nutrition information label on the carton and learnt to my shock and horror that even "unsweetened" soya milk contains sugar.
Marigold Power Beans' "unsweetened" soya milk contains 0.7g of sugar per 100ml.
I felt so deceived.
Another brand, Nutri Soy's "no sugar added" soya milk contains 0.8g of sugar per 100ml.
In their defence, both brands didn't say "no sugar". So it's my own fault for being so naive.
Except FairPrice brand's "unsweetened" soya milk actually contains 0g of sugar per 100ml!
So it is possible to have no sugar.
The lesson here is that not all brands of unsweetened soya milk are created equal.
Only FairPrice is truly sugarless.
And it's the cheapest too.
Consumers, be aware.