Why was this study done?

The health benefits of a plant-based diet are many. This study was designed to investigate the effects of replacing animal protein (milk) with vegetable-based protein (soy) during a weight loss program to see the effects of both diets on blood lipids (cholesterol, LDL, HDL).

What did the study find?

During the twelve-week study, an average of 2.5 kg (5.5 lbs.) were lost on a 1000 kcal diet where two meals were replaced with either a milk or a soy drink. Those participants who were on the soy diet had a significant reduction in total cholesterol and LDL cholesterol levels.

Hypocholesterolemic effect of vegetable protein in a hypocaloric diet.
Authors: Jenkins DJ, Wolever TM, Spiller G, Buckley G, et al. Atherosclerosis. 1989 Aug;78(2-3):99-107.
PubMed Citation PMID: 2783209.
PDF Manuscript: Atherosclerosis, 1989.