Nutritional Yeast is high in Thiamin
Thiamin (thiamin), or vitamin B1, is a water-soluble vitamin found naturally in some foods, added to foods, and sold as a supplement. Thiamin plays a vital role in the growth and function of various cells.  Only small amounts are stored in the liver, so a daily intake of thiamin-rich foods is needed.
Thiamin is rarely low in raw diets for puppies unless the diet is high fat. However, adult dogs have higher needs for Thiamin than puppies. Therefore, thiamin may be low in adult dog diets if certain ingredients are not fed. B vitamin supplementation is easily avoided when ingredients such as pork, lamb or lean duck are fed. However, nutritional yeast is another food high in Thiamin when these meats are not included.
1oz (28g): 22.28mg
Recommended Allowance (RA) of Thiamin per 1000kcal: