About this item Essential Mineral: Calcium helps support healthy bones, teeth & cardiovascular function Bioavailable: Calcium reacted with citric acid for enhanced absorption & bioavailability ActivTab: Guaranteed tablet disintegration within 30 minutes according to USP standards KAL Quality: Manufactured in our own facility & Lab Verified for potency, purity, and identity Committed to Quality: Lab verified using the strictest standard to ensure purity, identity & potency During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.