I dont think you can juice soy beans,or the substance you referred to.However juicing and adding a high quality protein powder will do wonders for your body.I personaly believe protein is overdone by most people.Thus becoming a burden to the body.If I was gong to suppement protein it would be rice not soy.Soy is to acidic,has issues with phytates,and the isolates are made in alluminum vats.Soy is not fit for human consumption!!Good luck on your cycling.