I do not provide energy (calories) but I do help regulate many of the chemical processes in the body. You need 13 different forms of me everyday. I am.

Vitamins

Explanation:

Vitamins play a very vital role in the human system, they are considered as essential nutrients which perform hundreds of roles in the body, some of those roles are building the bones, healing wounds, strengthen the immune system, repair damaged cells and conversion of food to energy. It's function spans into 13different category.

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a problem could be dealing witj emotional stress..all of these factors contribute to emotional stress.