Food Nutrition Labels (food)

I understand that there is a lot of "gaming" involved in disclosing information on nutritional information labels. There is no specific definition of what constitutes a serving and the FDA allows advertising claims to be made based on rounding up/down per serving (I mentioned this topic before in this post). But sometimes I come across information on a nutrition label that seems so out of whack I wonder how much we can trust these labels at all.

While at my local Chinese supermarket, I looked at different brands of soy drink. It is not soy milk. As Lewis Black put it, "we all know there's no such thing as soy milk 'cause there's no soy titty, is there?". One container listed the ingredients as "water, soybeans, sugar" while another listed the ingredients as "soybeans, water, cane sugar". Sounds pretty similar so no problem. The calorie and protein numbers are very similar, while one has 15g of sugar per serving versus 17g in the other. Nothing strange so far, until I come to the line about dietary fiber. One container lists 0g per serving while the other lists 4g per serving. 4 grams of fiber! That's a lot of fiber (>10% traditional RDA). So how do two versions of the same product, using the same three principal ingredients, differ by this much on an important macronutrient? Does anyone actually check this stuff?