Many types of vegetables are rich in vitamin B2. In addition to leafy greens, which are rich sources of a wide array of nutrients, we see other Brassica vegetables (including broccoli, cauliflower, and Brussels sprouts), peppers, root vegetables, and squash on the list of vitamin B2-rich foods.
http://www.whfoods.com/genpage.php?tname=nutrient&dbid=93
Seafood also contains high amounts of thiamine. Meat and seafood contain vitamin B-1. Lean meats, such as pork and beef, are good sources of thiamine per each 3 oz serving, which is approximately the size of a deck of cards. Seafood, such as tuna fish, contains a good amount of thiamine for each serving.
http://www.livestrong.com/article/366337-list-of-foods-containing-thiamine/
Biology 310 with Bjerknes at Canada Community College *. * The material on this site is created by StudyBlue users. StudyBlue is not affiliated with, sponsored by or endorsed by the academic institution or instructor.
https://www.studyblue.com/notes/note/n/water-soluble-vitamins/deck/12916030
The current daily value (DV) for vitamin B1 is 1.4mg. Below is a list high thiamin foods, click here for high vitamin B1 (thiamin) foods by nutrient density, here for an extended list of thiamin rich foods, and here for other vitamin B foods. #1: Fish (Trout) Other Fish High in Thiamin (%DV per 3oz cooked): Salmon (19%), Tuna (16%), Shad (10%), and Mackerel (9%).
https://www.healthaliciousness.com/articles/thiamin-b1-foods.php
Whole grain breads contain thiamine. Thiamine, also known as vitamin B1, aneurine or thiamin, is a water-soluble vitamin that serves several functions in the body. The vitamin helps the functioning of the muscular and nervous systems, and helps turn carbohydrates into sources of energy.
http://www.livestrong.com/article/366337-list-of-foods-containing-thiamine/
In terms of food groups, we see almost all of them containing foods that are contributors to vitamin B2 nutrition. Many non-dairy animal foods—including turkey, sardines, and eggs—end up in the top third of our B2-rich foods.
http://www.whfoods.com/genpage.php?tname=nutrient&dbid=93
A lack of thiamin can cause weakness, fatigue, psychosis, and nerve damage. Thiamin deficiency in the United States is most often seen in people who abuse alcohol (alcoholism). A lot of alcohol makes it hard for the body to absorb thiamin from foods.
https://medlineplus.gov/ency/article/002401.htm
Thiamin is one of the B vitamins. The B vitamins are a group of water-soluble vitamins that are part of many of the chemical reactions in the body. Thiamin (vitamin B1) helps the body's cells change carbohydrates into energy. The main role of carbohydrates is to provide energy for the body, especially the brain and nervous system. Thiamin also plays a role in muscle contraction and conduction of nerve signals. Thiamin is essential for the metabolism of pyruvate.
https://medlineplus.gov/ency/article/002401.htm
Seafood also contains high amounts of thiamine. Photo Credit Creatas/Creatas/Getty Images. Meat and seafood contain vitamin B-1. Lean meats, such as pork and beef, are good sources of thiamine per each 3 oz serving, which is approximately the size of a deck of cards. Seafood, such as tuna fish, contains a good amount of thiamine for each serving. Oranges contain thiamine.
http://www.livestrong.com/article/366337-list-of-foods-containing-thiamine/
Top 10 Foods Highest in Thiamin (Vitamin B1) Vitamin B1, Thiamin, or Thiamine, is an essential nutrient required by the body for maintaining cellular function and consequently a wide array of organ functions. Deficiency of vitamin B1 leads to wholesale degeneration of the body, particularly the nervous and circulatory systems, and eventually death.
https://www.healthaliciousness.com/articles/thiamin-b1-foods.php
which of the following meats provides the highest concentration of thiamin
Pork and beef meat provides the highest concentration of thiamin.  The highest concentration of thiamine is provide meats is pork and beef.