Yogabear - you can also buy branched chain amino acids as a supplement, if you're interested.
There is a 2 hour window for refueling your muscles after exercise. During that time, glucose and protein (you need both) shuttle into your muscles faster and promote recovery.
Whey protein is a fast protein. It is absorbed quickly. Again, you need glucose or some sort of fast carb with the whey as a transporter. You also should be consuming extremely low fat for your immediate-post-ride drink because you want these things absorbed quickly.
Casein is a slower protein. It is found in cottage cheese, etc. It is good for long term muscle rebuilding, e.g., when you're sleeping. Growth hormone is released during sleep which helps repair muscles. That is another reason why sleep is an important component of training.
I don't know of a good vegan source for either - possibly there isn't any because both are made from animals products (as far as I know.) It has been years since I was a vegetarian and I never ventured into vegan.




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