in simple... our body is made up of protein/water and incase structural damage has occurred, amino acids repair. L-Lysine is just one amino acid and its supposed to maintain collagen/elastin, which can be found in the lips.. Like i said before... the skin isn't really "connected" between the lower and upper layers on the lips.
I'll try whatever i'm going to try first involving amino acids and give feedback... so relax rite now.. peace