The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Calcium and vitamin D are both essential for strong bones, working together to support bone structure and calcium absorption. Neither is better than the other—balance is key. Deficiency or excess of ...

Vitamin D supplements are widely used for bone health and immunity, but excessive intake can lead to silent side effects. High calcium levels, kidney strain, digestive issues, mood changes, and bone ...