The reason for this is that scientific research into the usefulness of bras has been conducted and it has actually shown that bras are detrimental, not beneficial, to breast health. Sports science researcher Jean-Denis Roullion conducted a 15-year study on the effect of women from ages 18 to 35. Within his research, he found that bra usage at a young age actually provided no benefit in terms of breast support. His findings actually showed the complete opposite, stating that there was a 7mm lift in the nipples of women who did NOT use bras. He claims that bras could reduce circulation and breast tone over time.