It’s not easy being green, but it can be easy to be lean. Here’s how.

GRIN YOURSELF THIN

To maintain a healthy weight, do something to make yourself smile. Scientists in Brazil say serotonin, the “happy hormone,” reduces appetite, and higher levels of it make you more likely to burn fat.

CRACK SOME NUTS

In an Eastern Illinois University study, people who were given shelled (that is, naked) pistachios ate 897 kilojoules worthwhile those who had the in-shell variety (you crack ‘em open) consumed only 531 kilojoules in the same sitting.

PUT A FORK IN IT

Your non-dominant hand, that is. You’ll be more mindful of what you’re eating and probably end up consuming less. (Using chopsticks works, too, especially if you’re not a pro.) Just have plenty of napkins on hand.

USE A CHEAT PLATE

Curb your bad eating habits by checking out your plate. Make sure that your plate is partitioned for meat (a quarter of the plate), wholegrains (another quarter), and fruits and vegetables (half the plate).

BE AN EARLY BIRD

Late risers not only eat more kilojoules (almost 850 more at dinner and another 1594 after 8pm) but also eat more unhealthily than those who wake up 8am, according to a Northwestern University study.

EAT WITH A WOMAN

Men consume 37% less when they eat with a wife or girlfriend than when they dine out with their buddies, according to researchers at the State University of New York at Buffalo.