5 Sneaky Signs That You're Drained Of Vitamin D & How To Manage It 

Here are five signs this season has taken a toll on your vitamin D levels: 

Low energy or occasional fatigue is a common (but little-known) indicator of vitamin D deficiency. Vitamin D has multiple functions in the body, and one of them is to help out the powerhouse of your cells—the mitochondria. Not having enough vitamin D in your system can disrupt mitochondrial efficiency and leave you, your muscles, and your brain3 feeling subpar. 

Vitamin D plays an outsized role in modulating the body's innate and adaptive immune responses.* In other words, immune cells need D4 to efficiently respond to threats. And a low vitamin D status indicates that your body's defense system isn't as equipped as it could be.    

Well, research shows that a vitamin D deficiency may influence your sleep patterns (as vitamin D receptors are found in parts of the brain that regulate the sleep-wake cycle) and hurt your sleep quality and duration5. 

Vitamin D and the production of the neurotransmitter serotonin6 are closely intertwined. Healthy serotonin production supports feelings of well-being. Low vitamin D levels are linked to a harder time balancing mood7. This holds true for women who experience volatile mood changes around their menstrual cycle according to physiologist and nutrition scientist Stacy Sims, Ph.D.

Vitamin D receipts are located throughout the nervous system (including the brain which is why it influences your mood).* But it also plays a more general role in cognition8, and low levels appear to be linked to difficulties concentrating, including brain fog. 

Now, you can't rely on the (hopefully) sunnier days ahead to pull your vitamin D levels from the trenches. While some foods contain vitamin D (fortified dairy products, sardines, some mushrooms, and salmon), you can't rely on diet alone to correct this inadequacy.   

And it works. Many customers see their vitamin D levels start to rise—even if they were stubbornly low to begin with—after taking this supplement consistently.*

And reach for a supplement like vitamin D3 potency+ to really move the needle on your vitamin D status.