Soy milk is generally higher in protein. While cow's milk has about 3.5 protein per 100 grams, soy milk contains about 4.5.

The biggest difference between cow's milk and soy milk is that the proteins are different; cow's milk is an animal protein and soy milk is a plant protein. Soy milk is a mixture of soy milk and cow's milk (powdered milk).

Milk is rich in nutrients such as protein, fat, vitamins and minerals. Milk protein contains essential amino acids; milk fat is mostly short-chain and medium-chain fatty acids, very easy to be absorbed by the body; potassium, phosphorus, calcium and other minerals in a reasonable proportion, easy to be absorbed by the body.

Expanded Information:

First, people with acute allergy to milk can not touch any food containing milk. Not even a little bit when cooking.

Secondly, those with chronic allergy to milk should quit milk for a period of time.

Third, people who have severe acne (pimples on the face) and do react to milk should also avoid it. Both the insulin-like growth factor IGF-1 and whey protein in milk may worsen acne in some people.

Fourth, people with diarrhea should avoid milk. This includes people who are experiencing an intestinal infection and those whose diarrhea has not completely cleared up after eating a bad meal. In this state of intestinal infection, people who were not lactose intolerant are temporarily unable to break down and process lactose. Lactose that is not broken down promotes intestinal motility and aggravates diarrhea.?

Reference:People's Daily - Milk contains 4 kinds of good nutrition, but these 4 types of people should not drink

Reference:Baidu Encyclopedia - Soy Milk