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Make exercise a habit with these 10 helpful tips! Understanding the science of habits and how they work enables us to make and keep them.

Are you counting sheep at night? Or watching television hoping your eyelids will grow heavy and you will blissfully drift off to sleep? If you're struggling to get enough rest it's time to get back to basics: relax, create a bedtime ritual, move your body during the day. These and other tips from Health By Principle will help you sleep at night.

Looking for ways to support your immune system? We suggest you take a look at magnesium and vitamin D for the extra help you need!

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Vitamins D2 and D3 are essential for the absorption of calcium in your gut, which aids bone growth and your immune and neuromuscular systems. Nearly half the US population is deficient in vitamin D, but too much can be dangerous. Learn more about IUs and bioavailability to select the best vitamin D supplement.

It's time to crack out the sunscreen now that the weather is getting warmer! But what does it actually mean for your vitamin D production?