Obligatory disclaimer: This is not medical advice. Consult your regular physician. Use at your own risk.
Empty one envelope of vitamin C supplement powder (I like Emergen-C) and one envelope of Knox unflavored, unsweetened gelatin into a mug. The Emergen-C is to make it taste better..
Fill with cold water, stirring briskly with a spoon.
Do this two (ideally) or three (maximum) times a week.