Add 1-2 tablespoons of natural, non-pasteurized Apple Cider Vinegar to your shake. Pat recommends the natural apple cider vinegar distributed by Bragg. Vinegar is very important because it aids digestion. This is especially beneficial for older people who have decreased levels of hydrochloric acid in their stomachs.
Since vinegar affects the taste of this shake, consider taking it separately or use it on your salad instead.
Older people should also consider Lindberg Complete Digestant, a multi-enzyme digestive aid that helps you digest the protein, carbs and fat in the shake.