There's a lot you can do to reduce holiday stress. First off, make sure to eat protein with every meal. It's the great stabilizer for your blood sugar and your mood. Plus, it will help keep your cortisol levels right where they should be.

Cortisol is the stress hormone that causes your "fight or flight" response. We all need it from time to time. But low protein intake day after day can make your cortisol levels climb high and stay high. And that's not good. In fact, chronically elevated cortisol can cause blood sugar problems, weight gain, and lowered immunity.

So aim to get 10 to 20 grams of protein with each meal. That will go a long way in regulating your cortisol. Breakfast is usually the one meal where you'll fall short on protein. But that's an easy fix. Just eat an egg or two will help with holiday stress.

Each egg contains almost seven grams of protein. Just make sure to go for organic, free-range brown eggs. Get them from a local farmer, if you can! You'll know these eggs are the real deal if they have dark (almost orange) yolks and hard shells.

And if you're worried about the cholesterol in eggs, look back at last year's Guide to Good Health. You'll never think twice about eating real eggs again!

Any type of oily fish (yes, even in the morning!) is also a good protein choice. Oily fish like salmon also contain lots of omega-3 fatty acids. These natural substances help to lower those pesky cortisol levels which tend to creep up during the holidays. The omega-3s in fish can also help reduce holiday stress.

Plus, remember this...

Whole grains burn slower

During the stress of the holidays, it's more important than ever to choose whole grains. These grains boost the levels of serotonin, the "feel good" chemical in the brain. Plus, whole grains are packed with fiber, which your body will burn more slowly.

So opt for whole-wheat pasta instead of white pasta at dinner. You won't suffer from the blood sugar crash that will make you cranky and tense. Good whole grains to work into your diet include: 100 percent whole wheat, oats, barley, quinoa, and brown rice.

Okay, now we're really on a how to ease holiday stress roll. So why stop? This holiday, try your best to...

Combine whole grains with nutrient-rich foods

Make sure your meals contain lots of dark green vegetables. That's because dark greens such as broccoli, kale, and spinach contain lots of vitamin B. And the B vitamins keep your memory sharp, your energy high, and your anxiety low. Nuts also contain lots of B vitamins...as well as plenty of calming protein and magnesium.

It's also a good idea to take a complex supplement that contains all eight forms vitamin B. Plus, look for a brand that contains at least 25 mg of B1, B2, and B6. But don't stop there. Around this time of year, you may even consider taking a little extra B-12. It's one of the most important in this family of vitamins. Known as the "energy vitamin," it will help you power through holiday stress on even your most hectic days. Go for the sub-lingual form that you can squirt under your tongue. Your body will absorb this more easily than tablets.

Eat more citrus fruits

Next, I want you to eat more citrus this holiday season. Clementines are great this time of year and they contain lots of vitamin C. Research shows that vitamin C is a natural and powerful stress buster.

In fact, in a recent German study, researchers found that men and women who were given 1,000 mg of vitamin C showed fewer signs of stress. For the study, researchers divided 120 men and women into two groups. One group received 1,000 mg of vitamin C daily and the other group received a placebo. Next, the researchers subjected the volunteers to a series of stressful situations...public speaking and math problems.

Then, the researchers measured the volunteers' blood pressure and cortisol levels. Any guesses which group fared better?

You betcha.

The volunteers who took vitamin C had much lower blood pressure and much lower cortisol levels. Plus, they reported feeling less stress after they got the vitamin.

So in addition to eating citrus this holiday season, make sure to supplement with vitamin C. I'd go for a bit more than what the volunteers in the study took. In fact, strive to get at least 1,000 mg of C twice a day. Take that amount three times a day if you're really feeling like your pot's going to boil over, it will definitely help you reduce holiday stress.

Vitamin C is a water-soluble vitamin, so any extra your body doesn't need will get flushed. Plus, remember that vitamin C only stays in your body for a few hours at a time. So be consistent with your supplementing throughout the day and skip the time-released preparations as these are a waste of money.