They take plasma. The levels depend on your weight I think varies 600 I think 800 if u weigh up to 150lbs over 150 lbs 880 heavier your are by weight. The more you weigh the more you get is what I waa told
The amount of plasma they take varies by weight (up to 880ML for the heaviest category) but they return your red blood cells.
At plasma they take plasma not blood
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