Your body requires vitamin D3 for everything from bone health, to muscle function, to immune strength, and more.
Most Americans are deficient in vitamin D3, primarily due to inadequate sun exposure. The use of sunscreen also inhibits the absorption of vitamin D3. Typical Western diets don’t provide enough daily vitamin D3, so proper supplementation is very important.
Initial symptoms of low vitamin D3 can be subtle, such as fatigue, but severe deficiencies have been linked to bone issues, dementia, heart disease, diabetes, and more.