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The Offbeat Reason Why Cats and Dogs Lay In The Sun and Lick Their Fur

Sitting under the warmth of the sun oftentimes just feels great.  I’m sure you’ve heard that we get our vitamin D from doing this as well.  However, do you know exactly how the process works?

When it comes to furred mammals, they don’t get their vitamin D the same way we do, but you’ll find out how it’s done shortly!  First I’ll explain the importance of vitamin D, then mention how it’s formed for us humans, and then finally, how it relates to our furry friends.

What’s the importance of vitamin D3?

Vitamin D3 isn’t really a vitamin.  It’s actually more like a hormone.  The importance of it is that it helps regulate your mineral metabolism and subsequently maintains the calcium balance in your bones.  It is thought that this vitamin plays a role in affecting the expression of over 200 genes.

How do humans create vitamin D3?

The oil that naturally comes from our skin is a type of cholesterol.  Whenever we stand under direct sunlight, the ultraviolet rays react with this oil.  The ultraviolet radiation breaks some chemical bonds in the oil so that it forms a different molecule.  This molecule is known as the infamous Vitamin D3 which is why it’s also called the “sunshine vitamin.”

Once the cholesterol is converted to vitamin D3, it is then absorbed back into the skin and enters the blood stream.  You need about 10-15 minutes of full sunshine to get enough, but most people aren’t always able to do that, so it’s highly recommended you take a supplement.  This is especially important for fair-skinned people who just can’t hang out in the sun too long anyway because they will burn.

How do our furry friends get their vitamin D3?

Sunbathing is all the rage with these dogs. They sure do know how to live in the moment.

Dogs and cats secrete the same oily cholesterol from their skin, just like us.  When they lay in the sun, that oil is, again, converted to Vitamin D3.  The difference, however, is that because they have so much hair, the vitamin ends up on their fur and doesn’t get absorbed through their skin.

When they lick their body, to groom or clean themselves, they ingest the vitamin D orally.  So maybe it’s a good thing that cats have OCD with cleaning themselves.  Oh and by the way, I mention cats and dogs, but this info applies to ALL furry mammals and also to birds. 🙂

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