Vitamin D is essential for maintaining healthy bones, reducing inflammation, supporting the immune system, muscle function, and generating brain cells. People over 65 need enough vitamin D to maintain bone health and prevent damage from falls. As we age, our bodies produce less vitamin D, mainly because older people may spend less time in the sun and their bodies become less efficient at converting sunlight to vitamin D. Therefore, many people over 65 need to take vitamin D supplements or eat foods rich in vitamin D. Adults up to 70 should get at least 600 IU of vitamin D daily, and those over 70 should get at least 800 IU. Some sources suggest up to 1000 IU for those over 70. It's advisable to get a blood test to determine your vitamin D levels and consult with a doctor for a tailored treatment plan. Foods rich in vitamin D include fortified milk, yogurt, and cereals. Supplements can also help, with chewable versions available for easier consumption. Older adults can safely take up to 4000 IU a day. Adequate vitamin D can prevent bone diseases like osteoporosis and osteomalacia, making bones stronger and less prone to fractures.