One-A-Day® Women"s is a complete multivitamin with more Vitamin D (800 IUs) to support breast health* and more† Calcium for strong bones. Both bone strength and breast health are important for women of all ages. You can start to lose bone mass†† as early as your 30"s and you need to monitor your breast health as early as possible.* Emerging research suggests the daily consumption of 1,000 IUs of Vitamin D is associated with support of breast health.† Compared to One-A-Day Essential, and with twice the Calcium & Vitamin D in Centrum® for bone strength and breast health.†† Moderate bone loss with inadequate calcium intake.