9Vitamin D
Vitamin D is an essential substance for teeth, bones, heart health, as well as building your immune system. It can be obtained easily from sunlight. You can sit in the sun around 15 minutes 3 times per week without sunscreen. Often test your vitamin D level and make sure it is between 20 and 50 nmol/L. If you experience a deficiency of vitamin D, it would lead to some serious health issues. [9]















