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Akron Global Polymer Academy Lesson Plans

Can You Get Enough Protein from Milk Alternatives?

Grades: Grades 9-10
Author: Dori L. Hess
Source: This material is based upon work supported by the National Science Foundation under Grant No. EEC-1161732. Got Protein Kit by Bio-Rad: The Bio Rad Experiment is an ideal extension of this lab or for Honors/Advanced Biology Courses. The lesson listed here is an inexpensive way for students to make a simple quantitative analysis of protein in foods, without using a spectrophotometer and protein assay equipment. The lesson is ideal to do with introductory biology students.


This guided inquiry lesson allows students to apply their knowledge of organic compounds (primarily proteins) to their everyday life. Biochemistry lessons on proteins and enzyme insufficiency often make students wonder how someone who is lactose intolerant can obtain essential proteins from milk alternatives. This lesson lets students explore whether or not milk alternatives have the same protein concentration as traditional milk.


What should students know as a result of this lesson?

What should the students be able to do as a result of this lesson?




While there are various routes that can be taken to engage students for this lesson, it is suggested that a classroom discussion is used to begin creative thinking on the part of the students. A few suggestions for topics could be:

  1. Some say that milk is not a healthy choice anymore, but it contains vital proteins. Do you think that milk alternatives can/will provide an equivalent amount of protein?
  2. If people drink milk to get their protein, what do lactose intolerant people drink?
  3. Lacto/ovo vegans do not drink milk and they don't eat meat, do they get an adequate supply of protein from milk alternatives?

Depending on which route you take, it is suggested that you precede the discussion with an article or short video clip. Below are a few video suggestions:


Review Lab Safety Procedures

Students can apply classroom content to everyday life


Students are bombarded with information and often times don't understand the significance of a lesson in school. This easy, hands on activity provides students with the opportunity to evaluate a situation, form a hypothesis, check their hypothesis and then compare their results to nutrition labels.


  1. Body builders like to take in adequate quantities of casein (which is found in milk) yet some people try to avoid casein. After conducting the experiment and testing milk products for protein concentrations, students could research which alternatives have/don't have casein in them
  2. Students can conduct this test on eggs and egg alternatives, as well as other foods.
  3. Assign scenarios to groups, have students conduct the lesson and then present their findings to the class. Scenarios could include:


Best Teaching Practices

Alignment with Standards

NGSS Standards:

Ohio Standards:

Content Knowledge

Structure and function of proteins

How dietary proteins play a role in maintaining homeostasis


Proper lab safety procedures should be reviewed prior to the lesson

Do not drink any of the milk substitutes


Biopolymers, Nutrition, Food Science


Teachers may choose various routes to assess their students. Traditional assessments could include: Lab Report or Student presentation on the lab and their results. This is an online rubric that can easily be used for this lab.

Other Considerations

Grouping Suggestions: Students can conduct this activity individually or in groups of two. If students conduct the lesson in groups, ensure that each partner has a specific role.

Pacing/Suggested Time: Suggested time: 90 minute block: 1 to 2 class periods; 45 minute classes: Day 1 - Reading/video and discussion, Day 2 - activity and compile results, Day 3 - present findings (if classroom presentations are used)

Do not let students look at nutrient labels prior to forming their hypothesis or obtaining lab results, this may create bias.

If eggs are used, please note that 1 gram of egg = 1 ml (Bio Rad ).

Choose the engagement scenario that will fit the needs of your students.

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