How do you show that kwashiorkor is caused by protein deficiency using the scientific method?
If you have a test population of subjects with the disease, you could take blood samples and prove their serum albumin levels are lower than the normal subjects in your test. Then you could have a double blind controlled study and employ scientific method. Finding kwashiorkor patients before they have had any protein replacement is most difficult unless you are working in seriously underdeveloped parts of the world. Even when you find them, you may want to feed them rather than study them.
