1: Signs of Vitamin D Deficiency
1. Fatigue
2. Bone pain
3. Weakened immune system
4. Depression
5. Hair loss
2: Increased Risk Factors
1. Dark skin
2. Limited sun exposure
3. Age (elderly)
4. Obesity
5. Digestive disorders
3: Importance of Vitamin D
1. Regulates calcium absorption
2. Strengthens bones
3. Improves muscle function
4. Enhances mental health
5. Boosts immune system
5: Testing and Diagnosing Deficiency
1. Blood test for 25-hydroxyvitamin D levels
2. Symptoms assessment
3. Talk to healthcare provider
4. Personal and family medical history
5. Physical examination