Ever feel like weight loss is a puzzle, missing half the pieces? Understanding macronutrients is, for the right people, like finding those puzzle pieces under the couch and slotting them into place.

Aging is a beautiful privilege that not everyone gets to have. That doesn't mean it always feels like a piece of cake, however. Sometimes, it's something you'd rather not stomach at all.

Milk has been a staple for humans for thousands of years, and there's evidence that we started drinking it even before we could digest it well. (That period of evolution as we were developing the genes to digest dairy was probably a little … unpleasant.)

What's your go-to drink? If you said milk, you're not alone. Cow's milk is a popular drink for most North Americans and Europeans. In most households, you'll probably find a jug, carton, or — if you're Canadian — bag of cow's milk in the fridge.

Want better focus? Healthy cognition as you age? Or maybe just a better chess game? Then brain health is probably on your agenda. Aside from cool sci-fi scenarios with a magic pill or technological plug-in that makes you a genius, how else can you improve and/or preserve your brain health?

Intermittent fasting — which alternates fasting periods with an eating window — is a wonderfully flexible principle that you can customize for your needs, wants, and lifestyle. But if you're interested in intermittent fasting, you've probably felt like there are so many options that it's hard to decide which schedule to choose.

Look around, and you'll notice immediately that people are different. Humans vary widely in their shapes and sizes, from the barely-five-foot-tall populations in Indonesia and Bolivia to the easily-six-foot-tall folks of places like the Netherlands and Montenegro. Watch the Olympics, and you'll see diverse body types excelling at different sports: tiny bodies flying through the air in gymnastics, long bodies slicing through the water in swimming, and thick bodies hurling heavy objects through the air.

Cholesterol is a substance that our body makes naturally. We need some of it for good health and function. But when it gets out of whack, it puts us at risk of health problems. Almost 2 in 5 adults in the United States have high cholesterol, and high cholesterol doesn't have any symptoms.

Possibly the only thing worse than getting that urge — the one that has you clutching at your stomach and running for the bathroom at an inopportune time — is when that urge hasn't come knocking for days, and you feel like your gut is a tight, uncomfortable coil that won't unwind. Since modifications to what and when you eat can affect your bowel movements, it's natural to be nervous that a new eating routine could also mean a new bathroom routine.

Over the past several years, taking regularly scheduled breaks from eating — in other words, intermittent fasting — has become something of a phenomenon. But does intermittent fasting really live up to the hype? Is fasting really good for your health, or is it an unhealthy option in the long term?