Vitamin D is one of the most essential vitamins for women. It not only helps to absorb calcium from the calcium-rich food you consume, but also keeps your muscles and bones strong. It is also important to build stamina in young women. Vitamin D deficiency can lead to cervical spondylosis, severe body aches, and can also lead to difficulty in conceiving. The best and natural source of vitamin D is early morning sunlight; otherwise there are supplements available too.