Does Water Activity Change over Time

If you leave a product in air of a specific relative humidity they moisture content will balance out over time. In other words, if the air is very humid and the product has a low water activity, the product will absorb moisture from the air. Its water activity will increase.

Does water activity increase over time?

If you leave a product in air of a specific relative humidity they moisture content will balance out over time. In other words, if the air is very humid and the product has a low water activity, the product will absorb moisture from the air. Its water activity will increase.

What affects water activity?

Factors that Influence Water Activity Drying: Water activity is decreased by physically removing water (Ex: beef jerky). Solutes: Water activity is decreased by adding solutes such as salt or sugar (Ex: jams, cured meats). Freezing: Water activity is decreased by freezing (Ex: water is removed in the form of ice).