Eating After Dark? Your Heart Could Be a Ticking Time Bomb

The “grave shift” earned its nickname for a reason…

Working at night slowly kills your heart.

Night shift workers face an increased risk of heart disease, atrial fibrillation, hypertension, and more. In fact, if you regularly work at night, you have up to a 40 percent increased risk of cardiovascular disease compared to day workers

If you or someone you love is stuck working overnight hours, the simplest solution is to stop.

However, if that’s not an option, researchers have uncovered a way for night shift workers to protect against the increased heart risk.

What they found leads to good advice for all of us, regardless of whether we regularly pull all-nighters or not.

Researchers put 19 volunteers on a protocol that simulated night work.

Half of the study participants ate meals during the day and at night (which is common among night shift workers). The other half only ate during the daytime.

Those volunteers who ate at nighttime and during the day had reduced cardiac vagal modulation.

The vagus nerve is a component of the parasympathetic nervous system that helps regulate heart rate and heart rate variability.

Think of it as your body’s natural heart rate controller—like a brake system that helps your heart rest between beats and prevents it from working too hard.

When vagal modulation is reduced, it’s less efficient at managing heart rate and other heart functions. Ultimately, reduced vagal modulation is associated with an increased risk of heart failure and atherosclerosis.

However, eating only during the day helped to protect against the increased heart risks associated with night shift work.

This eye-opening study makes it clear that when you eat meals is even more significant for your heart health than night work alone.

This information could help you protect your heart health regardless of whether you are someone who pulls all-nighters or not.

For better heart health, eat your meals during daylight hours only. Set a firm cutoff time and stick to it. Late-night meals could harm your heart.

P.S. This “Graveyard Secret” could give you cancer.

View Sources

Chellappa, S. L., Gao, L., Qian, J., et al. (2025). Daytime eating during simulated night work mitigates changes in cardiovascular risk factors: secondary analyses of a randomized controlled trial. Nature Communications.