Unfortunately, I do not have useful links for this—my understanding comes from non-English podcasts of a nutritionist. Please do not rely on my memory, but maybe this can be helpful for localizing good hypotheses.
According to how I remember this, one complication of veg*n diets and amino acids is that the question of which of the amino acids can be produced by your body and which are essential can effectively depend on your personal genes. In the podcast they mentioned that especially for males there is a fraction of the population who totally would need to supplement some “non-essential” amino acids if they want to stay healthy and follow veg*n diets. As these nutrients are usually not considered as worthy of consideration (because most people really do not need to think about them separately and also do not restrict their diet to avoid animal sources), they are not included in usual supplements and nutrition advice
(I think the term is “meat-based bioactive compounds”).
I think Elizabeth also emphasized this aspect in this post
Unfortunately, I do not have useful links for this—my understanding comes from non-English podcasts of a nutritionist. Please do not rely on my memory, but maybe this can be helpful for localizing good hypotheses.
According to how I remember this, one complication of veg*n diets and amino acids is that the question of which of the amino acids can be produced by your body and which are essential can effectively depend on your personal genes. In the podcast they mentioned that especially for males there is a fraction of the population who totally would need to supplement some “non-essential” amino acids if they want to stay healthy and follow veg*n diets. As these nutrients are usually not considered as worthy of consideration (because most people really do not need to think about them separately and also do not restrict their diet to avoid animal sources), they are not included in usual supplements and nutrition advice
(I think the term is “meat-based bioactive compounds”).
I think Elizabeth also emphasized this aspect in this post