All About Hormones and Physiology

These “All About Articles” will cover the important hormones that impact your health and body composition such as estrogen, testosterone, thyroid hormone, and more. To stay up to date, subscribe to the Precision Nutrition RSS Feed or sign up for weekly email updates.

All About Fat Loss

Carrying a lot of excessive body fat makes health, body composition, and athletic performance worse. But here’s the problem — collectively, we’re not very good at losing fat either. We need a better solution. Knowing how fat loss works may be helpful.

All About The Thyroid

The thyroid is one of the “master controllers” that regulates nearly every major metabolic function in the body. If it slows down or speeds up, this can drastically affect health and body composition.

All About Growth Hormone

Growth hormone can make you more muscular, stronger, and leaner. Find out how to make this important hormone work for you, in and out of the gym. We’ll show you how to sleep your way to the top… of your growth hormone peak, that is.

All About Appetite Regulation, Part 1

Ever wonder what makes you hungry? Why some foods look more appealing than others? Why you’re always hungry for dessert? Or why you might open the fridge full of food, then stand there and say, “We have nothing good to eat!”? We’re driven by a complex play of chemicals that orchestrate food intake, desire, and food associations.

All About Testosterone

Testosterone: it’s like Austin Powers’ mojo. It keeps both men and women lean, strong, and frisky.

All About Insulin

Insulin is an important anabolic hormone. However, it’s possible to have too much of a good thing.

All About Vitamin D

Vitamin D, aka the “sunshine vitamin”, is crucially important for the body. And yet most of us are probably deficient. Grab the convertible or get on your bike and head to the beach!

All About Estrogens

Estrogen gets blamed for everything from wimping out in the gym to crying at long distance telephone commercials. But guess what — both guys AND girls have it! Learn more about estrogen’s role in the body, and what effect it might have on your health.

All About Dietary Acids and Bases

Has anyone ever called you “unbalanced”? It might not refer to your mental state, but to your acid-base status. The foods we eat can affect our body’s pH levels, and if we consume too much of the wrong foods, our bodies have to work hard to keep things under control. Find out if you’re dropping too much acid.

All About Diabetes Mellitus

What if we told you that there was a disease that struck 7% of the US population (and nearly one-third of people in some areas)… a disease that led to a multitude of other common and serious diseases, disabilities, and premature deaths… and that about 85% of these disease cases were completely preventable? Read all about diabetes mellitus, and what YOU can do to cut your risk, right now.

All About Dehydration

Feeling thirsty? Maybe it was that soy-sauce-laden takeout. Maybe it was the four beers after the game with friends. Or maybe it was that jog in Death Valley. In any case, you’d better drink up — because dehydration can put a cramp in your athletic performance.

All About Soy

From thyroid disease to GMOs, from breast cancer to infant formula, there’s been a lot of conflicting media reports on the safety of soy. We review the evidence, and explain the source of soy’s power as potential hero or villain.

All About Sleep

How can ZZ affect your BF? (And your GH, TSH, IR, GT, and T2D?)

All About Cortisol

Whether the economic crisis keeps you awake at night, whether you’re stressed out at work, or whether you’re just hitting the treadmill too often and for too long, you might be at risk for chronically elevated cortisol levels. Find out what cortisol is, how it works, and how it can affect your health, performance… and even that six-pack you covet.