Inside Science
/
Article

Why Daily Hunger Peaks Around 3 p.m.

AUG 26, 2016
If you are suddenly really hungry at 3pm it’s because your brain feels like it’s chemically high!
Why Daily Hunger Peaks Around 3 p.m.

(Inside Science) -- Come 3pm you can’t concentrate. Around 3pm you are feeling sleepy, and at 3pm you are suddenly really hungry. It’s because at 3pm – you’re stoned!

Now, maybe you’ve never smoked marijuana before in your life. But come 3pm your brain is baked in cannabis chemicals. Cannabis contains two active compounds – Cannabidiol and THC.

And when you smoke a joint, these chemicals enter your brain. And in the brain, they stimulate certain neurons that govern your sleep, your hunger, and your sense of smell. Yes, food actually smells better when you’re high because cannabinoids activate the olfactory bulb.

But how do you get stoned without smoking dope and why at 3pm? It’s because our bodies produce natural cannabinoids. Cannabinoids made from the cell membranes of brain cells. These are called endocannabinoids and they are produced on a daily cycle.

And that cycle peaks around 3pm, filling the brain with endocannabinoids, turning on hunger, sensitizing smell, and giving you the munchies!

More Science News
/
Article
X-ray photon correlation spectroscopy demonstrates ballistic motion as vitrified, glassy water samples coalesce under cycles of reheating and recooling.
/
Article
WASHINGTON, May 5, 2026 — Breast cancer impacts over 2 million women around the world each year. Following radiotherapy or chemotherapy, breast-conserving surgery is the first line […]
/
Article
WASHINGTON, May 5, 2026 — Earth’s ice is melting. As icebergs break away from glaciers and melt away, the fresh meltwater mixes into its saltwater surroundings. However, […]
/
Article
A flexible microlaser made from a silicone-based elastomer is suitable for a range of biomechanical experiments.
/
Article
In search of funding and autonomy, the preprint service is launching as a nonprofit.
/
Article
Precision heating of amorphous ice allows researchers to make tricky measurements of supercooled water.
/
Article
/
Article
Physiological communication relies primarily on ions to carry signals. The emerging field of bioiontronics aims to build engineered devices that can do the same.
/
Article
Interviews now available to the public bring the famed physicist’s lesser-known early years to life.