I’m a stickler for sleep hygiene. When I say my room resembles a cave, I’m not joking! The temperature is cool, there’s no sound, and it’s pitch black—so dark you can’t see your hand in front of your face. These ideal conditions help me sleep well every night. I usually go to bed just after…

It’s been brutally cold around here lately. I just heard that February 2015 will be the first month since 1978 when the temperature has not gone above 0°C in the Greater Toronto Area. That’s how cold it’s been! To make matters worse, the short winter days usually mean low vitamin D levels. Yet, my levels…