I did a search and came up with this from: bryannaclarkgrogan.com
She figured the nutrient in her recipe for homemade soymilk. I have no idea how accurate it is, but it gives me something to go on. This is what she says.
What is the nutritional information for homemade soymilk?
I came to these numbers by subtracting the nutrients from 3/4 cup of okara (the amount of okara or soy pulp left after making 1 batch-- 6 cups-- of homemade soymilk) from the nutrients in 100 g of raw soybeans, which is how much you use in a batch. I added calories for 1 and 1/2 Tbs. of sugar and sodium for 3/8 tsp. of salt (raw soybeans contain virtually no sodium) for the whole batch. I used nutrient info from the USDA National Nutrient Database for Standard Reference.
1 cup of all-soy homemade soymilk made from my recipe
71 calories; 5.6 g protein; 3.05 g total fat; 3.11 g total carbohydrate; 34 mg calcium; 2.41 mg iron; 42.6 mg magnesium; 130 mg sodium; .71 mg zinc; 1.36 mcg selenium; .143 mg thiamin; .142 mg riboflavin; .25 mg niacin; .045 mg vitamin B6; 62.45 mcg folate
NOTE: If you add 3/4 Tbs. calcium carbonate powder to each batch of 6 cups, add 300 g of calcium per cup of soymilk to the nutrient count.