Not eating past 7 or 8 p.m. can be beneficial for health, including reducing breast cancer recurrence risk.

“13-hr overnight fast lowers breast cancer recurrence by 36%.”

“And, you know, we have seen, in our breast cancer survivor study, we definitely saw an improvement in hours of sleep per night when people had a longer fasting duration.”

“women that had breast cancer and had fasted for at least 13 hours overnight had a 40% reduction in breast cancer recurrence.”

“our research seems to show that two things, one we see great...our biggest reductions in breast cancer, for instance, recurrence, with at least 13 hours of fast. And we really believe that fast needs to start around 7 maybe to 8 p.m. at night.”

“And that's where we found that it seemed at least in this sample of women that the cutpoint of 13 hours reduced their risk of breast cancer recurrence by about 40%. It also reduced the risk of mortality by about 20% or a little more than that but that was not statistically significant.”

“I think that's a pretty good incentive for women to set that clock when they put the first bite of food in their mouth, or the first non water beverage, that clock set, and making sure that you don't eat food past 7 p.m.”

“And that also jives with another piece of data that came from Ruth Patterson's group that women who fast for 13 hours overnight are protected from breast cancer. They have, like, a 36% lower breast cancer occurrence.”

“So this is where things are really murky. But at the same time we know, going back to the study that we discussed, Ruth Patterson study, they did not consider coffee as food. So when they considered 13 hours overnight fasting, that 13 hours actually included coffee and tea.”