Yeah, I was nearly shocked when it happened almost overnight upon supplementing with the sulbutiamine. Mind you, my gut health is quite poor so B12-absorption is already compromised so was taking methyl-B12 lozenges for a few years already plus high-strength vit B complex. Those water-soluble B-vitamins aren't as well absorbed as the fat-soluble B1 vitamin.
That's the main reason why going too low in fats isn't a great idea as it messes with vitamin absorption.
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