The subjects did provide blood samples throughout the day when they were doing this. (liftingrevolution.com)
You will have to provide a blood sample which will be tested for your cholesterol and lipid levels, among many other possible conditions. (bestchoicelifeinsurance.com)
Study participants also provided blood samples to check for inflammation — the automatic reaction of the innate immune system upon exposure to infection, injury or abnormal cells, or psychological stress. (sciencedaily.com)