I had homocystine level 52 last year in july and this month my homocystine is 7.3 don't know how long i had level 52 does homocystine 52 for 6 months damages artery or under 100 is ok does body has something to defend against it?

I suspect that the lab results of your homocysteine levels are inaccurate as a striking change over several months to this extent are unexpected, especially if you possess an MTHFR genetic profile. Suggest you supplement B-complex vitamins. There is no reason to fret about a potential vascular problem at this point based upon information provided.