Can I eat Werthers Sugar Free Original Butter Candy/Toffee Sweets on my low carb diet.
Probably not a good idea if you want best results.
Here is an actual article on the subject. However, I would still be wary. Sugars/aspartame will knock you right out of ketosis if you're not careful.
I make these at home because that way I am sure they are healthy and sugar-free. Be careful, because usually honey is added to such sweets. You know it's not good for your body, so let's search about alternatives.