Piling on the pounds but can’t for the life of you, figure out why? Well, it may actually be the fact that your bedroom curtains are not heavy enough. Yes, you did read that right!

Well, that’s according to the latest study released.

More than 113,000 women took part in the Breakthrough Generations Study, which followed British women for a period of 40 years to find the root cause of breast cancer. The study found that obesity is one of the key causes. In their findings, they uncovered that the more light those studied were exposed to while sleeping, the higher their waist size was.

Professor Anthony Swerdlow, from the Institute of Cancer Research in London, offers an explanation for this: “Metabolism is affected by cyclical rhythms within the body that relate to sleeping, waking and light exposure.”

However, no need to walk around in complete darkness just yet, as Dr Matthew Lam from Breakthrough Breast Cancer says: “It’s too early to suggest that sleeping in the dark will help prevent obesity, a known risk factor for breast cancer, but the association is certainly interesting.”

Looks like it is back to the drawing board for us, so.