It appears that anabolic steroids influence hepatic triglyceride lipase (HTL) and lipoprotein lipase (LPL). Males usually have higher levels of HTL, while females have higher LPL activity. HTL is primarily responsible for the clearance of HDL-cholesterol, while LPL takes care of cellular uptake of free fatty acids and glycerol. Androgens and anabolic steroids stimulate HTL, presumably resulting in decreased serum levels of HDL-cholesterol.