If I had high cholesterol, I'd get it under control before I cycled. But if you're gonna cycle regardless, I would get bloods before my first injection, mid cycle, same week as last injection & then 4 - 6 weeks after PCT. I know it seems to be a bit overkill, but I'd rather be accused of overkill than have someone looking down on me in my coffin saying "if only he had kept closer track of his cholesterol".