Being deficient in thiamine, or vitamin B1, can cause symptoms that are subtle and often overlooked. Here are 8 signs of thiamine deficiency, plus treatments.

Vitamin B1 Dosage for Adults. If your blood tests don’t show vitamin B1 deficiency and you don’t take any supplements, you are getting enough of the vitamin through your daily diet.

Vitamin B1, or thiamin, is essential for glucose metabolism and healthy nerve, muscle, and heart function. A deficiency of vitamin B1 can be fatal.

Read on to learn more about vitamin B1, including why it’s important, how to increase your intake, and signs of a thiamine deficiency.

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