basically, foreign food will not be marked with the date of production, but only with the date of expiration. Since you buy American products, there is usually such a sign as Exp. EXP here means Expired. Therefore, the date after EXP is the date of expiration.

You should say that Nature Made Nutritional Products USA is not a manufacturer, but "American natural". And the number you see should be the product number or something.

2.

then I'm curious, freshness &; Is the string of numbers after potency guaranteed through printed with the trademark or printed later?

3。

more curious, is the product you bought licensed by the FDA?

4。

I checked the FDA/CAC/AOAC for you, but I didn't find any related products and related time codes. Basically, it can only be understood that KB123N is the product number, and 1-3 is January 23 according to American standards.

I hope it helps you. . .