BOTH Vitamin synthesize intestine

[Grimm]

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Hello,
I want to ask which vitamins are synthesized in intestine? I was searching about it and found that B1 B2 and etc are synthesized in intestine but other articles denies that.

P.S. my english isn't mother language so if I wrote smth wrong please correct it.

 

[Anti-PD1]

The gut flora make Vitamin K.

 

[Grimm]

Intestine only make vitamin K?

 

[Alis2010]

I know from UW the normal flora small intestine is colonized with enteric bacteria which can produce vitamins K and folate ,inhibit proliferation of surrounding pathogenic bacteria and digestion unabsorbed dietary sugar and convert them to fatty acid.

If small intestine overgrowth ---------overproduction of Vit K and folate

 

[Grimm]

Thank you, for explaining about vitamin K and folate. But at this website where I linked they are talking nonsense?

About 80% of the approximately 25–30 mg of thiamin in the adult human body is in the form of thiamin diphosphate (TDP; also known as thiamin pyrophosphate), the main metabolically active form of thiamin. Bacteria in the large intestine also synthesize free thiamin and TDP, but their contribution, if any, to thiamin nutrition is currently unknown [4]. TDP serves as an essential cofactor for five enzymes involved in glucose, amino acid, and lipid metabolism [1,3].