If I may add an advice to your fine post - instead of processed protein powders you can use natural whole food sources that provide a range of health benefits compared to industrial supplements. Use almond or hazelnut flour instead which are cheap, healthy and excellent protein sources. They are basically a waste material remaining after process of cold-pressing nut-oil so the price is usually nice (be careful not to buy them overpriced in specialized shops). The protein content in those goes as high as 50 percent of high-quality proteins, paired with dietary fibers, some carbs for energy, a range of beneficial phytochemicals, and almost no fat (it's been pressed out). Please check my post on proteins in vegan diet. I'm following you with interest.