Currently, silica gel is the most common desiccant (or drying agent) on the market. Silica gel packets can be found in almost everything you purchase including shoes, foods, medicines, and electronics. Silica gel absorbs and holds water and is easily contained in fiber packets due to its large particle size. It does not react chemically with most substances and is safe in proximity to food.
However, the newly formulated Upsalite, or dry Magnesium Carbonite (MgCO3), may be an even more efficient desiccant than silica gel due to its larger surface area. The obstacle to overcome: Upsalite may not be easily contained in porous packages due to its small particle size.
It will be interesting to see how this discovery is integrated into commercial products and chemical processes.