Abstract: Purpose—Risk factors for occurrence of breast cancer can be broadly divided into two categories non-modifiable and modifiable factors. Non-modifiable factorsinclude age, gender, geographical conditions and modifiable factors include but are not limited to age at menarche, teenage adiposity, physical activity, mammography screening, dietary exposures to nutrients, number of pregnancies etc. Contrary to popular belief, cancer is in reality a result of accumulated factors over a lifetime and not just a few years. Understanding the factors observed from an early age in a young adult is therefore essential for the risk assessment of breast cancer occurrence. In this article we aim at understanding the risk factors observed from an early age and present a comprehensive study of research work and case studies concluded so far on various modifiable factors identifiable in young adults.