Ingredient Caking Due to Moisture

Regarding your Pro Polymer and Nano Hyaluronic Acid ingredients caking and becoming hard, this is indeed due to moisture absorption. These types of powder ingredients are hygroscopic, meaning they readily absorb moisture from the air, even if the container is sealed tightly after opening.

However, the good news is that the caking does not mean the ingredients have lost their effectiveness. The active properties of Pro Polymer and Nano Hyaluronic Acid should still be intact.

When you use the caked powder, you might find that it takes longer or requires more effort to dissolve completely in your formulation compared to the original powder form. You may need to stir or blend for a longer duration.

To prevent further moisture absorption and inhibit potential microbial growth, it is highly recommended to store these ingredients properly. As advised by C7, storing them in the refrigerator can help keep them dry and maintain their quality for longer.

So, while the texture has changed, your Pro Polymer (Gel Maker), Pro Polymer Silk, Hyaluronic Acid (Nano Molecule, 800daltons), and Hyaluronic Acid (Nano Molecule, 2000daltons) should still be usable and effective, provided they are stored correctly from now on.