Re: More on B3 and *CAUTIONS* in re: to whether you have Low or High Histamine

"When talking about buying supplements in the United States, keep in mind that now all supplement manufacturers provide the same quality of supplements."

Not true at all.  Though I don't currently currently subscribe to Consumer Labs I have in that past and at the site below you can  see their reports on all the supplement manufacturers that they test.  Many of the supplements they test don't have anywhere near the amount of the substance that is on the label and many, many also have contaminated content.  Unlike a prescription drug producer, an over the counter supplement producer can put anything he wants into the product.  It is only when consumers complain that they are tested.  It is Orin Hatch of who wrote legislation supporting the massive supplement industry of his home state of Utah who got this ugly method of taking a product to market implemented. 

From Consumer Lab reports I have found that anything that Costco sells whether it is their house brand or someone else's brand - are always in compliance with what the label says.

http://www.consumerlab.com/