Are Stevia and Truvia allowed?

No, they are not Bright Line Eating friendly. The Bright Line is not just for sugar, but for anything sweet other than whole, natural fruit and whole, natural vegetables. Concentrated sweetness is addictive. In rat studies, rats prefer sweet liquid (of any kind) over being injected with cocaine. This is even true for rats who are already addicted to cocaine. They still prefer the addictive hit of the sweetness hitting their taste buds. But do not worry—once your taste buds are trained to not need concentrated forms of sweeteners, your sense of taste will change and the sweetness in fruits and vegetables will be more than enough to enjoy the full bounty of food.