One less coffee for one more cup size?

No need for padded bras, underwires, push-ups, cosmetic surgery, or hormone treatments: according to researchers at Lund University in Sweden, a slightly fuller décolleté could be achieved simply by reducing daily caffeine intake.

The study, carried out over a 10-year period, found that heavy coffee drinkers—those consuming three cups of coffee a day or more— risked having one cup size smaller.

Tests were conducted on about 300 young women, recording both their bust measurements and habitual caffeine consumption. Helena Jernstroem, the lead researcher, observed a clear link between the two: higher coffee intake correlated with smaller breast size.

The reason likely lies in a specific genotype (CYP1A2!F – allele C), present in about half of the female Swedish population: in women carrying this allele, the relationship between caffeine and breast size appears to be triggered.

A silver lining for avid coffee drinkers worried about their cleavage: women with moderately high caffeine consumption have a lower risk of developing breast cancer and, when it does occur, show better responses to tamoxifen treatment.

“Anyone hoping to guess how much coffee a woman drinks by her breast size will be disappointed,” Jernstroem clarified. “Women can rest assured, their breasts won’t disappear overnight.”

So, for women with the modified allele who drink large amounts of coffee, no need for scalpels or silicone—just skip one cappuccino or espresso.