Comment by naiyt

Yes, but you still need insulin on keto. In fact, starting keto can be dangerous for a T1D at first until you find out what your new, lower, requirements are. You put yourself at risk of hypoglycemia, so you have to be extra careful with dosing while you're figuring it out. Because of that, a closed loop artificial pancreas could be incredibly helpful for a T1D going on keto as well.