Immune-Boosting
Vitamin D3
Critical for immune cell function. Deficiency impairs T-cell and macrophage function. Reduces risk of respiratory infections. Modulates inflammatory response. Supports innate and adaptive immunity.
Mechanism of Action
Critical for immune cell function. Deficiency impairs T-cell and macrophage function. Reduces risk of respiratory infections. Modulates inflammatory response. Supports innate and adaptive immunity.
Active Compounds
Therapeutic Applications
Serving Size & Preparation
Recommended Serving Size
2000-5000 IU daily (test levels, optimize to 50-80 ng/mL)
Preparation Guidelines
D3 form (cholecalciferol) superior to D2. Take with fat for absorption. Best with K2 (calcium regulation). Test levels regularly
Synergistic Combinations
These foods and compounds enhance the therapeutic effects of Vitamin D3:
Additional Notes
Most common nutrient deficiency, critical for immune function
Safety Information
Contraindications
Very high doses (>10,000 IU long-term without monitoring), hypercalcemia
Quick Facts
Evidence Level
Related Foods
Garlic (Immune)
Allicin has broad-spectrum antimicrobial activity. Stimulates macrophages and NK cells. Enhances T-cell proliferation. Antiviral effects against common cold, flu.
Medicinal Mushrooms (Immune)
Beta-glucans activate macrophages, NK cells, and T-cells. Immune-modulating (not just stimulating). Increase immune surveillance. Adaptogenic immune effects.
Zinc
Critical for immune cell development and function. Deficiency impairs T-cell function. Zinc lozenges reduce cold duration. Supports wound healing. Needed for over 300 enzyme systems.