Is 100 mg of thiamin ( vitamin b1) too much to consume in a day?!

Best Answer - Chosen by Voters

No.

B1 is a water soluble vitamin and so any excess will be excreted from the body. Since you are taking it as part of a multivitamin/b complex you should be fine. Generally speaking you want to take all the B vitamins as a group.

You may also want to check the serving size. Sometimes the serving size is 3 pills and so if you take one pill then you are only getting 1/3 the dose. So double check the serving size on the back to see how many pills you have to take to get the 100mg. If it is 2 or 3 then you can split them up with meals so that you get better value for your money.

http://www.orthomolecular.org/nutrients/…

Daily recommendations for dietary vitamin B1 are listed below.

Pediatric

?Newborns - 6 months: 0.2 mg (adequate intake)
?Infants 7 months - 1 year: 0.3 mg (adequate intake)
?Children 1 - 3 years: 0.5 mg (RDA)
?Children 4 - 8 years: 0.6 mg (RDA)
?Children 9 - 13 years: 0.9 mg (RDA)
?Males 14 - 18 years: 1.2 mg (RDA)
?Females 14 - 18 years: 1 mg (RDA)
Adult

?Males 19 years and older: 1.2 mg (RDA)
?Females 19 years and older: 1.1 mg (RDA)
?Pregnant females: 1.4 mg (RDA)
?Breastfeeding females: 1.5 mg (RDA)
http://www.umm.edu/altmed/articles/vitam…

The RDA is often a bare minimum of our true needs, from what I read.

It is best to take a B complex vitamin. My complex has 4.5 MG of B1
I am curious, why do you question the amount of B1 specifically, and what makes you question the amount?