The following Mark's Daily Apple article was written by Mark Sisson, and is narrated by Tina Lehman.

Eight primal food challenges you can Can Take Humans are competitive animals.

We like a challenge because it compels us to rise to the occasion, prove ourselves,

get better at something, or become a bigger version of ourselves.

For people, challenges are like hormetic stressors.

They often cause suffering and require hard, unpleasant work,

but provoke a beneficial response that makes us stronger than we were before the challenge.

How does that apply to the challenges I've laid out in today's post, which are all about food,

diets, and cooking? Each one unlocks a tangible benefit. Eating more vegetables helps you to obtain more nutrients.

Stopping the meal before you're too full, lowers energy intake.

But there are also less obvious benefits to meeting a challenge.

Let's get right to it.

Number one, stop when you're 80% full.

In Japan, they say Harahachiibu, which translates to eat until 80% full. It's the inverse of Louis C.K.'s

philosophy of eat until you hate yourself. Don't eat food just because it's on your plate.

Don't cram in every last morsel. Ask for a to-go box, bust out the Tupperware

containers, push the plate away. If you can figure out how to make this a regular habit,

you may find that adhering to a healthy eating plan is even easier. One study found that habitual

80% fullers tended to eat fewer grains and more servings of vegetables.

Number two, eat 10 servings of vegetables each day for two weeks.

The number just keeps climbing. First, it was three a day, and that didn't do much. Then it was

five a day, and the results disappointed. Now they're saying that 10 servings of

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