5 Things to Know About Thiamin aka Vitamin B1

If you read nutrition facts labels, especially on breakfast cereals, you may have noticed thiamin in the long list of vitamins and minerals. In case you have wondered what it is and why it is needed, here is some research for you in a simple Q&A format. I am following up on my article on vitamin A from a couple of weeks ago. Let me know what you think of this format and if you have any other questions that I did not cover here. I will get them answered by one of our experts and post them under Ask the Expert column.

What is Thiamin?

Thiamin is also known as vitamin B1, one of the 8 B vitamins needed for many important cell functions inside our body. In short, they are needed for healthy functioning and growth of child’s body. Together they are also known as vitamin B complex especially in nutritional supplements.

Thiamin, like the other B vitamins, is soluble in water. It was one of the first chemicals to be considered a vitamin early in the 1930′s when researchers discovered that thiamin deficiency caused beriberi (also known as extreme weakness). People with beriberi have difficulty standing, walking and controlling their muscles.

Why does my child need it?

According to the 2nd edition of the PDR for Nutritional Supplements, Thiamin is involved in the conversion of carbohydrates into energy required for cell functions. It also helps convert some of the amino acids into proteins.

How much Thiamin should my child be getting?
What are good sources of Thiamin?

For infants, the FDA has recommended a daily amount of 0.3 – 0.5 mg. And for toddlers less than 4 years old, the recommendation is 0.7 mg. Pregnant and nursing women are recommended to take about 1.7 mg per day. Healthy adults are advised to take about 1.5 mg per day.

The best sources of Thiamin are whole grain foods and fortified cereals. Most cereals are fortified thiamin hydrochloride and thiamin mononitrate (check the label). Here are a few examples of different food sources and amount of thiamin per serving:

Whole wheat bread, one slice = 0.1 mg
Brown rice, cooked, 1 cup = 0.19 mg
Enriched white rice, cooked, 1 cup = 0.26 mg
Fortified breakfast cereals, 1 cup = 0.5 – 2.0 mg
Lentils, cooked, 1 cup = 0.17 mg
Pork chopped, cooked, 3 oz = 0.8 mg
Orange juice, 1 cup = 0.1 mg
Sunflower seeds, 1/4 cup = 0.8 mg
Spinach, cooked, 1/2 cup = 0.09 mg
Wheat germ cereal, 1 cup = 4.47 mg

As you can see, thiamin is naturally available in many common food sources. There is really no need to look for a nutritional supplement for thiamin although you will find many multivitamin products on the market. Check out my review of some of the popular kids brands of multivitamins.

Research has not shown any harmful effects of overdose of thiamin from foods or supplements. Oral thiamin is well tolerated upto 200 mg daily or higher (it is over a 100 times more than the recommended value). There is no reason, however, to take a high dose of thiamin supplement.

What happens if my child does not get enough thiamin?

According to the PDR for Nutritional Supplements, thiamin deficiency can cause any of the following conditions:

Cognitive and emotional changes – in short, it may affect memory and mood.
Although anemia (decrease in number of red cells) is not a direct result of thiamin deficiency, certain kinds of anemia respond well to thiamin treatment. It is understood this could be due to reduced absorption of thiamin or problems in conversion of thiamin inside cells.
Extreme deficiency of thiamin causes beriberi. Dry beriberi affects the muscles in the lower legs and feet. Wet beriberi involves the heart and blood circulation. The most extreme form of wet beriberi is called Shoshin beriberi, which can result in death if not promptly treated. Another form of beriberi is cerberal beriberi (Wernicke-Korsakoff) which affects the nervous system and causes problems with eye movement and even mental health.
Although not well-researched, some people think that thiamin deficiency may be involved in ADHD.

Thiamin deficiency is generally a problem with severe sustained malnutrition and alcohol abuse. Most healthy kids and adults with normal eating habits and lifestyle should not have to worry about it.

Should I be concerned about thiamin deficiency?

Since thiamin is so commonly available in many foods and cereals, it should not be a big concern. However, we live in the world of fast food which is usually made from refined carbohydrates. Refined carbohydrates, unless enriched, do not contain enough thiamin. In fact, the reason why they found out about beriberi was because it was first seen in people of Asia who mainly ate polished rice. If your child’s diet is mainly junk food and not enough whole grains, nuts, fruits and vegetables, you may want to pay attention to his vitamin B needs.

What do you think? What changes, if any, would you consider making to your child’s diet so she gets enough thiamin? Do you have recipes that use food sources rich in thiamin? I would love to hear from you!