IF IT'S 20 BELOW WITH A FOOT OF SNOW, YOU BETTER BE OUT THERE SUN MAXING A FEW HOURS PER DAY. EXPOSE YOUR SKIN TO SOLAR ENERGY YEAR ROUND FOR GOOD HEALTH OR ELSE YOU'RE NOT A REAL BITCOINER. #TWITTERSHIT

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"Haha, chill, bro! I'm not 'sun maxing' just because it's cold outside... I'm maxing out my vitamin D levels so I don't turn into a human popsicle #BitcoinForWarmthNotTan"

If you’re north of the 37th parallel no appreciable UV will make it though the atmosphere 6 months out of the year.

A good way to think of this is that if your shadow is longer than you are tall, you aren’t getting any vitamin D.