You're tired ALL the time but don't know why. Can your food choices be to blame?

You may be thin on the outside; but inside, you're fat. Just because you're "skinny," it does not mean you're healthy.

Have you been feeling a little "off" lately? Lack of energy, always feeling cold, trouble concentrating, or unexplained weight gain could be a sign of an underactive thyroid. According to the American Association of Clinical Endocrinologists, upwards of 27 million Americans suffer from some type of thyroid disorder. Of those, it's estimated that half remain undiagnosed.

Misdiagnosed and Misunderstood

Hailed as "the master" of our endocrine system, second only to the pituitary, the thyroid is a small gland shaped like the outspread wings of a butterfly that sits at the base of the throat. It excretes two hormones - thyroxine (also known as T4) and triiodothyronine (or T3) - that regulate metabolism within every cell in the body.

Low levels of these hormones slow everything down, and it's why symptoms of hypothyroidism often include weight gain and fatigue, as well as constipation, depression, irritability, low body temperature, sleep disturbances, forgetfulness, edema (fluid retention), hair loss, decreased libido, joint pain, and a hoarse voice.

Yet, because these symptoms can resemble a host of other diseases, the thyroid is often overlooked by physicians.

What is the absolute best way to get your metabolism to speed up? The answer may surprise you.

Colorado is the leanest state in the nation. Why? It’s where diet, activity, and environment seem to perfectly intersect.

Becoming a fat-burning machine doesn't happen overnight; but it can happen relatively quickly if you restore youthful metabolism.

Why would you downplay your alcohol use to the one person you should truly be confiding in when it relates to your health?

The new year is here. Are you finally ready to start that exercise program? Here are the basics you need to know for fitness success.

Not a fan of working out? Learn how to completely tone your body in a simple 30-minute walking workout.

Learn about a few simple, everyday movements for preventing pain, illness and even early death.

Most diets fail for a reason that may surprise you. It's not because they're so restrictive, but rather what they are lacking.

Cardiologist and author of Burn Calories While You Sleep, Dr. Tim Fischell, provides diet and exercise tips to help you lose weight fast.

Barre workouts are the hot new thing, but do they work? Learn more about this latest fitness sensation.

Every day, one in four Americans will visit some type of fast food restaurant. As a nation, we spend more than $110 billion annually on fast food.

Water exercise can be a tough, demanding workout. It is not just for seniors anymore.

If you went to your local fitness equipment store, would you know the few really important items to purchase?

Learn easy ways to dodge tempting foods that quickly add extra pounds.

Can spicy foods really boost your metabolism? Or is that a big myth?

Dr. Ginger explains the many health benefits of infra-red saunas.

Experts estimate that 75% of overeating is due to emotions. It is a huge barrier to weight loss and a healthy lifestyle.

Vitamin D seems like one of the simpler nutrients your body needs. But, that's a myth. Find out which vitamin D you need and why.

Have you tried every pill, potion, powder or food to get your metabolism revving? Maybe it's not as complicated as you think.

If you suffer from diabetes, you can minimize the harmful effects of high blood pressure by following these four nutritional steps.

The most important meal of the day, breakfast, can actually lower your risk of developing diabetes.

Methylfolates affect your weight, hormones and metabolism. They may also lead to depression.

Muscle confusion can lead to greater fitness and boost your metabolism. But how do you confuse your muscles?

They may seem harmless, but condiments could be ruining your diet.

Breakfast is the most important meal of the day. If you are trying to get to a healthy weight, learn why you should be eating breakfast every day.

Do you know your "perfect weight"? Learn the secrets to getting there - and staying there.

Learn ways to incorporate movement into everyday life and give up that sedentary lifestyle once and for all.

Are you tired of sitting at your work desk all the day long? It might be time to try a Treadmill Desk.

You may not even realize the many ways you undermine your own weight loss efforts. We're here to help.

There are certain behaviors that are needed for long-term weight loss. Learn how you can finally lose those extra pounds for good.

These exercises are the best of the best! They will leave you feeling strong, fit, glowing and healthy!

Don't let a slow metabolism slow you down. Boost your fat-burning capabilities with our Conditioning 101.

Research shows how a new plant extract called Fucoxanthin safely reduces body fat without stimulating your brain or heart, while lowering disease risk factors.

Can you actually speed up your metabolism with food? Yes! Achieve ultimate weight loss by choosing foods that burn more fat.

Tips to speed up and keep your metabolism humming!

Do you have trouble losing weight, no matter how much you diet and exercise? You may be suffering from a broken metabolism.