Slide 1: Vitamin A: The Essential Nutrient. Slide 2: What is Vitamin A?. Slide 3: Key Functions: The Power of Sight. Slide 4: Beyond Vision: Broader Roles. Slide 5: Where to Find Vitamin A. Slide 6: Recommended Daily Intake (RDI). Slide 7: Vitamin A Deficiency (VAD). Slide 8: Impact of VAD. Slide 9: Vitamin A Toxicity (Hypervitaminosis A). Slide 10: Conclusion: Balance is Key