Why do you have to mix insulin before use my mom is diabetic and she wants to why she has rub the 70/30 insulin between her hands before she uses

Many : Many types of Insulin do not need any mixing, rubbing. Those insulins that are cloudy are mixtures or suspensions that don't work well if not gently mixed. In my view, these are inferior insulins that do not match your body's normal Insulin production. These mixtures tend to make you need to eat for the Insulin so as to avoid getting a low sugar. The better insulins also do not require mixing or rubbing. The main downside of these other "clear" insulins is that they cost more. Otherwise, they are superior in many ways. See the link below.

Good : Good question. Mixing Insulin in the vial is necessary to ensure proper Insulin concentration and prevent precipitated Insulin from being concentrated at the bottom of the vial. Shaking the vial vigorously is not recommended as it will lead to the creation of air bubbles, making it harder to draw the correct amount of Insulin into the syringe. Cayce t. Jehaimi, M.D., faap pediatric endocrinology & diabetes the children's hospital of southwest florida fort myers, fl, usa.