Why is thiamine so rare in foods?

[LadyRae]

Sari Foods Nutritional Yeast Flakes

NuNaturals, Non-Fortified Nutritional Yeast Flakes,

I used to get this brand also until I saw that it is full of iron.

 

[Dr. B]

I have always wondered, why is it that you can get almost all the other minerals and vitamins in huge RDA amounts from food (copper and vitA from liver, B12 from seafood, B2 from most offal and milk, etc) but it is not that easy to hit the RDA for B1. Pork is basically the only food rich in thiamin, giving around 100% in 100grams.

Milk and OJ. I think standard milk is 0.1mg per cup, so grass fed organic possibly has more?
Also OJ i think was 0.2mg per cup? So if you have a half gallon milk, and a liter of OJ, thats already at least 1.6mg thiamine. Also those figures are for pasteurized so its possible fresh squeezed and raw have even more?

 

[Peater]

a liter of OJ, thats already at least 1.6mg thiamine

Metabolising carbs uses up thiamine though. Not sure if it makes a difference fructose/glucose.