Vegans pay close attention to avoiding all animal by-products in their diet. This is an admirable level of discipline that most weightlifters appreciate. Unfortunately, if you're a vegan and looking to build muscle and consume enough protein, the macronutrient needed for muscle growth will be a challenge.
Non-vegans may find it hard enough to consume enough protein, which is why people consume shakes and supplements to boost their intake. Even vegans have a hard time – and it depends on what's in those shaker bottles.
When it comes to protein powder, whey is the gold standard for men who want to build muscle fast. Whey ̵
The thing is that whey does not work for everyone. Some athletes simply can not tolerate whey (and a stench in the weight room definitely goes against all sorts of fitness etiquette rules). Others are lactose intolerant. And of course vegans need herbal protein alternatives.