DH's feet were very painful and he winced when he walked. After a couple of months on the LCHF diet, they suddenly became worse. I read on this forum that could have meant the nerves were regrowing because of the diet.
Lots of googling later, he started taking benfotiamine, R-lipoic acid and acetyl l-carnitine. Noticed an improvement after only a few days and he no longer winces when he walks. Result!
Thanks to everyone who wrote about their experiences with benfotiamine. Very helpful. It's brought his BG down too - he's T2.