Hi
@Pugsy and welcome to the forum!
I use different sweeteners including truvia. It is stevia based but uses erythritol as a bulking agent. It is ok for diabetics, but it does carry a warning that excessive consumption may induce laxative effects.
Most of the other sweeteners I use are 1:1, ie one teaspoon is equivalent to one teaspoon of sugar. Truvia is a lot sweeter, and one third of a teaspoon is equivalent to one teaspoon of sugar.
I only use it in my coffee, one sachet of Sweet'nLow and one third of a teaspoon of truvia.