I have always believed homocysteine was a marker of inflammation in the body...so you want that number low, in the single digits.
Anytime you get a blood test, I'd get the homocysteine checked. You have to ask for it, it's not included in the standard CBC. Then keep track of your levels, and notice your lifestyle changes, if any. Try to live how you lived when the level was at its lowest.
Homocysteine is very commonly associated with heart attack risk....another good reason to know what your level is and keep it low