Feeling tired, achy, or low on energy? You might be deficient in Vitamin D, a vital nutrient that supports bone health, immunity, mood, and overall well-being. Since Vitamin D comes mainly from sunlight, many people, especially those with limited sun exposure are unknowingly deficient. What This Test Checks: Vitamin D Levels - determines if you’re getting enough for optimal health. Deficiency Risk – identifies if low levels are affecting your energy, immunity, or bone strength. Results are received within 7 working days