No, not at all, I had about six months of eating a diet like broccili, chicken, jacket potatoes, carrot juice , fruit no alchohol, no smoking......
Also excercise a lot.
Now i smoke drink and eat take out's and it makes no difference ( just like any 1 else would ).
Why should a diet help, i have no problems anywhere else, if i had a vitamin deficiency i doubt it would only show in my lips?
The only thing i do is just be gentle with my lips, only peel when it looks like or feels like the scab is comeing off, never force it! ( if you can help it obviousley)