It's possible you have a genetic polymorphism in your hepatic lipase that saves your lipids. That said, if I had to lay a bet, I would first send that Anavar off for testing. It's one of the most often faked compounds, and raws prices have skyrocketed recently. However, even the scummiest of shitty sources will at least throw you some Winstrol instead, which should torch your HDL just as well. I can't think of any other ingredient that would fit into a single capsule to give you pumps and vascularity. Arginine / citrulline would require a bit more volume of powder. The only thing that comes to mind is tadalafil / sildenafil. Way cheaper than Var and lots of pumps.
It might be good to have that Var tested either way. That HDL is very suspicious for any oral especially anavar. You should at the very least get a bit in terms of neural drive and feeling of well being on the anavar. And as long as you're not deep in a calorie deficit, you should get some size and strength from 50 mg daily. I cut my anavar a few days ago and I miss it already.