About colecalciferol Who can and cannot take it How and when to take it Side effects Pregnancy, breastfeeding and fertility Taking it with other medicines and herbal supplements Common questions Related conditions Hip fracture Menopause Osteoporosis Rickets and osteomalacia Useful resources Royal Osteoporosis Society: charity theros.org.uk Steps Worldwide: charity – vitamin D deficiency www.stepsworldwide.org Vitamin D