Because the possibility of bias is greater in case control studies, prospective studies are generally given more weight in the evaluation of the effect of nutrient intake on disease. (bodybuildingforyou.com)
How much sugar is associated with lower nutrient intake in the Australian diet? (srasanz.org)
Some labels also list nutrients in a serve of the product as a percentage of daily nutrient intake. (eatforhealth.gov.au)