The vegan diet, which completely eliminates all animal-derived foods, is becoming increasingly popular due to its health, environmental, and ethical benefits. However, this diet poses significant nutritional challenges, particularly the risk of calcium deficiency—a vital micronutrient for bone health. While plant-based foods such as leafy greens, tofu, sesame seeds, and almonds contain calcium, their absorption is often limited by the presence of inhibitors like oxalates and phytates. Studies have shown that vegetarians, especially postmenopausal women, tend to have lower bone mineral density and a higher risk of osteoporosis compared to those who consume a more varied diet. Additionally, vitamin D deficiency, which is common among vegans, further impairs calcium absorption and accelerates bone loss. Therefore, individuals following a vegan diet need to carefully plan their meals, include a variety of calcium-rich and easily absorbed foods, and ensure adequate vitamin D intake to support long-term bone health.