ESSENTIAL AMINO ACIDS
There are very important Essential Amino Acids that we get from eating animal products. Unless you understand this, and do what's necessary to replace these with certain food combinations, you run the risk of dangerous, possibly permanent, negative health affects.
If this is information you are not familiar with, consider this as an introduction, not complete info. I suggest you do more of your own research into this to make sure you're doing everything you need to do to keep yourself nutritionally optimized and protected.
* Note: As the owner of this website, any nutritional or health information provided on, or linked to from, this website is only my opinion. I am not a medical or health professional and am in no way giving medical or health advice. Consult with a professional in these areas before making any diet or health decisions. This website, its owner, and its contributors are not responsible or liable for any negative health outcomes due to the choices or decisions made by the website visitors. *
Here are some links to web pages that describes this in more detail.
Here is an Opposing View from Forks Over Knives that claims the danger of Incomplete Proteins is a myth.
You decide but, for me, I will be sure to take in the recommendations for Protein Combos to make sure I'm covered for Essential Amino Acids.
I'm not saying I think this is right or wrong. I simply don't know.