Lp(a) mass is a potentially useless metric because it measures total LDL particle weight including Lp(a), rather than specifically apolipoprotein a, whose molecular weight is highly variable.

“LP little a mass which is the way in a deciliter of plasma of the weight of your into all your LDL particles everything that's in them their triglycerides their cholesterol ester their phospholipid protein that is carrying an a po lipo little the LDL density it's so but you're weighing everything you're not weigh April little a you're not measuring April little a per se yes that has a molecular weight but the molecular weight of a PO B is higher than the molecular weight of April little a but you're measuring that too when you do an LP little a mass but the molecular weight of a PO B is known because it's pretty much the same whereas the molecular weight of April little a is very very variable so that's another reason LP little a mass becomes a useless metric