When you donate plasma they give a liquid in your blood for dehydration does that make gain weight?

The liquid infused during plasma donation is a sterile sodium chloride solution, known as normal saline. It is used to replace the volume of plasma removed during donation and is not a source of calories. Therefore, donating plasma does not directly cause weight gain. Weight gain or loss is primarily influenced by factors such as overall calorie intake, physical activity, and metabolic rate.