Vitamin D3 is often called the “sunshine vitamin” because the body can naturally create it from sunlight. Despite this, many people have vitamin D3 deficiencies. Medical experts estimate about one billion people in the world are vitamin D3 deficient for a variety of reasons including not getting outside enough, wearing sunblock too often, having more melanin in their skin, eating a vegan diet or having milk allergies, and having an underlying condition that causes malabsorption of vitamin D3. There are a variety of symptoms that can indicate a vitamin D3 deficiency.

1. Fatigue

If you’re low in vitamin D3, you may feel tired all the time and fatigued even when you’re getting a good night’s sleep. You may feel like you don’t have the energy to keep up with everyday things. Vitamin D3 helps keep the body feeling energized because it works toward good health in so many ways including keeping the immune system healthy and enabling the body to heal naturally.

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