Data sources
DRI as published by the Food and Nutrition Board, Institute of Medicine, National Academies
- For the graph of minerals and vitamins, the charted value is (nutrient in food / DRI for nutrient) / (Calories in food / DRI for Calories).
- DRI values for a nutrient vary depending on the category an individual falls into. The DRI nutrient value used in this application is the highest DRI value for any category. The calorie requitement used is 2000.
USDA Database version SR28
- For more information, please visit the USDA
- This database focuses on foods most often eaten in the USA.
- Most measurements include supplemental vitamins or minerals added by a manufacturer in addition to naturally occuring nutrients
Details on SR28 measurements used here:
- Calorie conversion to grams
- For conversion from gram to calorie this site is using a multiplier of 9 for fat, 4 for carbohydrate or protein, and 6.93 for alcohol.
- Vitamin A
- RAE values (the most recent standard that adjusts for bioavailability) are being used
- Vitamin D
- The sum of D2 and D3
- Vitamin E
- The naturally occurring form (RRR-α-tocopherol). Added vitamin E data is ignored.
- Vitamin K
- The USDA gives vitamin K1 data. K2 MK-4 data is given. Although the DRI focuses on K1, this site used K1 + K2. The USDA does not give data for K2 MK-7. There is also another form present in hydrogenated oils (dihydrophylloquinone) that the USDA gives data for- but this is ignored.
- B-12
- The USDA gives 2 measurements: B-12 and B-12 added. Only B-12 is being used.
- Folate / Folic acid
- There are 4 data points given by the USDA. There are 2 folate measurements- folate and folic acid. Folic acid is principly a supplement used to enrich grains. USDA also gives total folate and total folate DFE, where the DFE measurement includes folic acide and adjusts for its bioavailibility. The total folate DFE measurement is the one being used.
- Choline
- The total choline value is used- this includes several types of choline, but not betaine.
