Usual intake of one-carbon nutrients
MSM
Dietary recall data were linked to the USDA food composition database, which contains data from the Food and Nutrient Database for Dietary Studies, Food Patterns Equivalents Database and NHANES Dietary Supplement DatabaseThe ASA24 nutrient intake data were used to calculate the usual intake of each 1C nutrient following the Multiple Source Method (MSM). MSM is a method for estimating the usual dietary intake from a 24 h recall or short-term assessments. This method can account for intra-individual variation and handle different distributions of nutrient data