vitamin D
Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and phosphorus, which are essential for strong bones and teeth. It also plays important roles in muscle function, immune health, and inflammation control

here are some key function of vitamin D:
Bone Health: It helps regulate calcium levels in the body, promoting calcium absorption in the intestines and maintaining bone mineralization.
Immune Function: Vitamin D enhances the pathogen-fighting effects of monocytes and macrophages—white blood cells that are crucial to the immune defense.
Cell Growth Modulation: It plays a role in regulating cell growth and differentiation, which may help in reducing the risk of certain cancers.
Muscle Function: Adequate levels of vitamin D are important for muscle strength and function.
Cardiovascular Health: Some studies suggest that vitamin D may contribute to heart health by influencing blood pressure regulation.
Vitamin D can be obtained from sunlight exposure, food sources (such as fatty fish, fortified dairy products, and egg yolks), and dietary supplements.

Signs of Deficiency:
Bone pain or back pain
Frequent infections
Muscle weakness or cramps
Fatigue or low mood