Hello again! B Positive Insider here to bring you the letters K and L, for "K+" and "liquid"!
So, you're probably wondering what "K+" is. Well, it is the element symbol for potassium, and potassium serum exists in your blood to help your nerves and muscles communicate. When someone has low potassium levels it can be dangerous; you may experience nausea, muscle cramps or weakness, dehydration, low blood pressure, and confusion.
It is very important that you as a donor keep your potassium levels high so that your body can perform at its best after donating several times. You can do this by eating bananas, lean meats, lentils or pinto beans, and drinking soy or animal's milk. A potassium supplement may also be a good idea for some donors. Low potassium levels could also cause irritability, so good potassium levels will keep you happy too!