A study published in the American Journal of Clinical Nutrition, relates multivitamin usage and breast cancer. The study evinces that older women who consume multivitamins are at an increased risk of developing breast cancer.

However, the study does not prove that multivitamins are directly linked to the disease.

Researchers are of the belief that it is biologically possible that multivitamins could affect women in this manner and thereby they have established this probable link. However, the research requires further investigation before anything substantial can be established.

The result of the study is the outcome of a ten year study that involves 35,000 Swedish women between the ages of 49 and 83. The participants of this study were free from cancer at the outset. However, over the span of 10 years,
974 of these women were diagnosed with breast cancer.

Researchers discovered that women who reported of taking multivitamins at the start of the study were 19 % more likely than non-users to develop breast cancer.

Researchers also considered factors like age, family history of breast cancer, weight, fruit and vegetable intake, and exercise, smoking and drinking habits taken while conducting the study.