More than just calcium Contains exclusive Natto K2 (MenaQ7** Brand) in the form of menaquinone-7, the most bioactive form of vitamin K2, a patented, clinically proven ingredient to enhance bone-building function. Combination of 29 clinically proven ingredients to reduce bone loss and increase bone density. Key trace minerals not found in other bone support products (such as strontium to increase bone strength). Doctor-developed by bone expert Dr. Alan Gaby Author of best-selling natural bone health books for over the past 10 years. Co-author of The Natural Pharmacy, and many other publications. **MenaQ7 is a trademark of NattoPharma, Norway.This supplement combines 29 bone-supportive ingredients, including five types of calcium and the 15 best studied vitamins and minerals for bone health. It provides a balanced combination of important nutrients to support and maintain healthy bones and is targeted to work especially well for women.