The primary reason for hydration is that we’re collecting plasma and plasma is 90% water. Good hydration ensures the procedure will be well tolerated and the recovery more rapid. Proper hydration can ensure the veins are adequately dilated and will make inserting the needle easier. 

These beverages reduce iron absorption in your blood, which is essential in maintaining strength and energy. Avoiding these drinks will help maintain your energy levels after donation. Caffeine can also elevate your pulse, which can prevent you from being able to donate for the day.

These foods lead to a high concentration of fats in your blood, making it harder for the plasmapheresis machine to separate your plasma from your red blood cells. This, in turn, can make your donation time longer.

This will allow you to have a quicker recovery.