Thiamine tablets are usually taken once a day. Doses of 25-100 mg are sufficient to prevent mild deficiency. You can take the tablets at whatever time of day you find easiest to remember, either before or after meals.

Do you take thiamine with or without food?

You'll usually take thiamine once a day if you have a mild vitamin B1 deficiency. You can take it with or without food. It's best to avoid alcohol if you are taking thiamine for a vitamin B1 deficiency.

What are the symptoms of low thiamine?

Early symptoms of thiamin deficiency are vague. They include fatigue, irritability, poor memory, loss of appetite, sleep disturbances, abdominal discomfort, and weight loss. Eventually, a severe thiamin deficiency (beriberi) may develop, characterized by nerve, heart, and brain abnormalities.