Vitamin D Deficiency Care for Adults

Vitamin D deficiency means the body does not have enough vitamin D to stay healthy. Vitamin D helps the body absorb calcium and keeps bones and muscles strong, so a shortage can weaken bones over time. The body makes vitamin D from sunlight and also gets it from food and supplements, and many adults run low without realizing it. Avita MD primary care providers test for and manage vitamin D deficiency for adults in Los Altos, Mountain View, and Los Gatos.

What are the symptoms of vitamin D deficiency?

Many people with low vitamin D have no symptoms, which is why testing matters for those at risk. When symptoms do appear, they may include:

• Bone pain or tenderness
• Muscle weakness or aches
• Fatigue or low energy
• In severe, long-standing deficiency, soft or weak bones and bone fractures

Because mild deficiency is often silent, a blood test is the reliable way to know your level.

How does Avita MD diagnose and treat vitamin D deficiency?

At Avita MD, evaluation begins with your history and risk factors, such as limited sun exposure, darker skin, older age, digestive conditions, or medications that affect vitamin D. We confirm the diagnosis with a 25-hydroxyvitamin D blood test, which we can draw on-site, so there is no separate trip to a lab. Same-day and next-day appointments mean you can be seen quickly when fatigue, bone pain, or muscle weakness prompt a visit.

Treatment is matched to how low your level is and usually combines a vitamin D supplement with vitamin D rich foods and sensible sun exposure. We review the dose with you, address any underlying cause, and recheck your level to confirm it has improved. Through longitudinal tracking we follow your results over time and keep vitamin D in view alongside bone health and other care. When deficiency stems from a kidney, liver, or absorption problem, we coordinate referrals.

This table shows how 25-hydroxyvitamin D blood levels are generally interpreted for adults:

25-hydroxyvitamin D level	What it generally means
Below 12 ng/mL	Deficient; too low for healthy bones
12 to 19 ng/mL	Inadequate for some people
20 ng/mL and above	Adequate for most adults
Above 50 ng/mL	Higher than needed; may cause harm

When should you see a doctor about vitamin D deficiency?

Schedule a visit if you have ongoing bone pain, muscle weakness, or unexplained fatigue, or if you have risk factors such as little sun exposure, a digestive condition that affects absorption, osteoporosis, or a history of fractures. A simple blood test can confirm whether your level is low, and treatment is straightforward. Talk with an Avita MD provider before starting high-dose supplements, since too much vitamin D can also cause problems.