Saturday, September 14, 2013

Nutrient Analysis: Soy Lecithin

Soy Lecithin


My analysis of Soy Lecithin proved interesting, as I'm not completely convinced that the USDA's "Oil, Soybean Lecithin" is close enough to the same product to do a comparison. Regardless, it is what I used, but I'd sure like to see some more convincing evidence that I'm using the right numbers here.

Additionally, I'm starting to question the Omega-3 and Omega-6 numbers that I'm finding on sites like nutritiondata.self.com. Take, for instance, the Omega-3 listed for 4g of Soy Lecithin on the site. If you dig into the details there you can see that there is 231mg of 18:03 fatty acids. My understanding is that 18:3 fatty acid can be differentiated into 18:3 n-3 and 18:3 n-6. The n-3 version is an Omega-3 fatty acid and the n-6 version is an Omega-6 fatty acid. Since the USDA figure doesn't seem to differentiate, so I'm uncertain how self.com does. At the moment, though, my understanding of fatty acids is very rudimentary. So I will use the figures I find, even though I question them. As I discover more I'll update these numbers. If you know more, please comment!

Here are the numbers I've chosen to use:


PackagingmakesoylentcronometerUSDAChosen ValueJustification
Serving Size8g8g8g8g8g
Calories (kcal)6061616161All sources agree per USDA rounding rules.
Carbohydrates (g)1000.5Using the smallest value that will round up to 1 per USDA rounding rules
Protein (g)00000All sources agree
Total Fat (g)48884.49Using the largest value that will round down to 4 per USDA rounding rules
Saturated Fat (g)101.21.20.945Using USDA Value, but adjusting for reported total fat: 1.2*4.49/(1.2+.878+3.625)
Monounsaturated Fat (g)0.9.878.691Using USDA Value, but adjusting for reported total fat: .878*4.49/(1.2+.878+3.625)
Polyunsaturated Fat (g)03.63.6252.854Using USDA Value, but adjusting for reported total fat: 3.625*4.49/(1.2+.878+3.625)
Omega-3 Fatty Acids (g)0.41.40.41UNJUSTIFIED, but backed up by nutritiondata.self.com
Omega-6 Fatty Acids (g)3.213.23.21UNJUSTIFIED, but backed up by nutritiondata.self.com
Total Fiber (g)00000All sources agree
Solubule Fiber (g)00All sources agree
Insolubule Fiber (g)00All sources agree
Cholesterol (mg)00000All sources agree
Vitamin A (IU)0000All sources agree
Vitamin B6 (mg)000All sources agree
Vitamin B12 (ug)0000All sources agree
Vitamin C (mg)0000All sources agree
Vitamin D (IU)0000All sources agree
Vitamin E (IU)11.05.43329.43329Using USDA Value
Vitamin K (ug)1514.714.714.7All sources agree
Thiamin (mg)0000All sources agree
Riboflavin (mg)0000All sources agree
Niacin (mg)0000All sources agree
Folate (ug)0000All sources agree
Panthotenic Acid (mg)0000All sources agree
Biotin (ug)00All sources agree
Choline (mg)50% of 550mg is approx. 275mg282828250NEEDS VERIFICATION. The front of the packaging calls this out explicitly. It is funny that the USDA figure is 10% of the packaging figure. This could indicate that I'm using a bad base element in choosing Oil, Soybean Lecithin or that there is a unit error somewhere along the way.
Calcium (g)2% of 1g approx. 0.02g000.01Using lowest value that will round up to 2% per USDA rounding rules
Chloride (g)00All sources agree
Chromium (ug)00All sources agree
Copper (mg)0000All sources agree
Iodine (ug)00All sources agree
Iron (mg)2% of 8mg approx. 0.16mg000.08Using the lowest value that will round up to 2% per USDA rounding rules
Magnesium (mg)0000All sources agree
Manganese (mg)0000All sources agree
Molybdenum (ug)00All sources agree
Phosphorus (g)0000All sources agree
Potassium (g)0000All sources agree
Selenium (ug)0000All sources agree
Sodium (g)00000All sources agree
Sulfur (g)00All sources agree
Zinc (mg)0000All sources agree

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