High-density lipoprotein (HDL) is often referred to as "good" cholesterol because it helps remove excess cholesterol from the bloodstream and transport it to the liver for excretion.
Low-carb diets, including zero-carb diets, can lead to a reduction in triglyceride levels. High triglycerides are associated with an increased risk of cardiovascular disease, so lowering them can be beneficial.
Low-density lipoprotein (LDL) cholesterol is often referred to as "bad" cholesterol. The impact of a zero-carb diet on LDL cholesterol levels can vary widely among individuals. Some people experience an increase in LDL cholesterol, while others see no change or even a decrease.
While individual changes in HDL, LDL, and triglycerides can occur, the overall impact on total cholesterol levels may be variable.