Interteck Packaging Tyvek silica gel packets are US Food & Drug Administration (FDA) standard, and approved with the use of foodstuffs and medicines. Tyvek silica gel desiccant packets are the best option for preventing mold, mildew, moisture and corrosion. Protect guns and ammo, food, nuts, seeds, medicine, electronics, camera gear, flower drying, keep precious photos and documents dry, and use as a safe dehumidifier! To learn more about Silica Packets visit our website at https://interteckpackaging.com/product/silica-gel-packets-5-gram/.