One packet of Truvia provides the same sweetness as two teaspoons of sugar, but has no calories. Truvia provides an alternative for people with diabetes. Kosher-certified Truvia is made from the stevia plant. The sweet taste comes from a natural ingredient from the leaves called rebiana.One packet of Truvia provides the same sweetness as two teaspoons of sugar, but has no calories. Truvia provides an alternative for people with diabetes. Kosher-certified Truvia is made from the stevia plant. The sweet taste comes from a natural ingredient from the leaves called rebiana.