Vitamin D helps the body absorb calcium, supports bone and muscle function, and plays a role in immune health. Because symptoms can be subtle, recognizing the early signs of vitamin D deficiency can help you decide when to speak with a healthcare professional and whether testing is appropriate.

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Iron Deficiency and Sleep: How Low Iron Can Contribute to Restless Nights
Iron deficiency can affect more than daytime energy. For some people, low iron stores are linked with restless sleep, frequent nighttime movement, and symptoms often associated with restless legs syndrome. Understanding this connection can help you recognize when nutrition, testing, and medical guidance may support better rest.
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