Anyone have stories of long term thiamine deficiency symptoms being reversed with supplementation?

I’ve had deficiency symptoms (involuntary eye movements, double vision, dysautonomia, nausea/no appetite, etc) for 3 years and just found out I’m deficient a month ago.

I’ve been supplementing 300mg benfo, 100mg ttfd, 300mg magnesium glycinate, and multivitamin daily for the last 3 weeks with some visual and nausea improvements. Im just really worried these symptoms won’t go away because it took 3 years to figure it out.

Anyone have stories of long term deficiency symptoms improving with supplementing?