A molecular model of vitamin B5 (pantothenic acid), an essential nutrient responsible for the synthesis of coenzyme-A, as well as the synthesis and metabolization of proteins, carbohydrates, and fats. Vitamin B5 can be found in most foods, with higher amounts in whole grains, eggs, meat, avocados, and yogurt. Atoms are colored dark gray (carbon), light gray (hydrogen), red (oxygen), and blue (nitrogen).