The Effect of Vitamin K Supplementation on Bone Health in Adult Crohn's Disease Patients

Inclusion Criteria: * long-standing Crohn's disease - disease diagnosis \> 5 years * in clinical remission at baseline - Harvey-Bradshaw score (\< 5) * aged between 18-70 years Exclusion Criteria: * use of steroid medications to treat disease or flare up * use of blood thinning medications (warfarin, heparin, asprin, dicoumarol derivatives) which may influence vitamin K metabolism * use of bisphosphonates, calcitonin medications (to treat osteoporosis) * use of experimental drugs (in the last 30 days) or inclusion in another intervention trial * bone mineral density \< -2.5 (indicative of osteoporosis) or previous diagnosis of osteoporosis * use of vitamin/mineral/fish liver oil dietary supplements * use of other alternative supplements (i.e herbal) * if the patient is under 18 or over 70 years of age * presence of a significant acute or chronic coexisting illness (cardiovascular, immunological or a condition which in the investigator's judgement, contraindicates involvement in the study) * presence of malignant or any concomitant end-stage organ disease