Cystine not reported for eggs?

t4sm5la4r

For the day, my Cystine shows 37% despite consuming two large eggs.

According to MyFoodData.com, eggs are one of the top sources for Cystine with a single large egg containing 51% of the RDI for Cystine.

https://www.myfooddata.com/articles/high-cystine-foods.php

What am I misunderstanding?

t4sm5la4r

I see the problem. The item doesn't have most of the micronutrients specified. Is there a way to get this information and update the item?

Marie_Eve_Cronometer

Hello @t4sm5la4r ,

We report the same cystine values for eggs. For ''Eggs, Cooked'', 1 large egg contains 0.146 grams of cysteine.

MyFoodData.com is using different targets from Cronometer to calculate their DRI%. The DRI that they are referring to are the WHO guidelines, which recommends 4.1 mg/kg of body weight. They are also calculating the DRI for someone weighing 70kg.

https://apps.who.int/iris/bitstream/handle/10665/43411/WHO_TRS_935_eng.pdf;jsessionid=79168E386DEF39F918D6D5925FB4A3A8?sequence=1

In Cronometer, we use the amino acid recommendations from the National Academy of Science:

Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. Chapter 10: Protein and Amino Acids. The National Academy of Science, Institute of Medicine, Food and Nutrition Board in the US in 2005.
https://www.nap.edu/read/10490/chapter/12

Based on the values given in table 10-22 (page 677), where there is more than one EAR given, the values were averaged and rounded to the nearest whole number. The RDA for amino acids is 124% of the EAR, rounded to the nearest whole number.

For cysteine, this would mean that our target is 9.5 mg/kg of body weight. It is higher than the target determined by WHO, which would explain why 1 large egg does not correspond to the same DRI % determined by MyFoodData.com.

The Cysteine target in Cronometer will also be adapted to your exact weight.

Please let me know if you have more questions!

Regards,
Marie-Eve