Soy protein is by far the most popular non-animal based protein source. Various forms of soy protein offer a relatively high levels of protein. However, excessive intake of soy protein may present some undesirable side effects, especially in men. Alternatives to soy protein are numerous. Some of the more complete and readily available ones are:

1. Mycoprotein is a fairly balanced protein source lacking the side effects associated with soy protein. Mycoprotein is fungi based.

2. Cruciferous vegetables, especially broccoli, are an excellent source for balanced protein. In addition, their anti-oxident properties offer additional health benefits.

3. Various legumes, especially lentils, pinto beans and chickpeas are all great sources for protein.

4. For those vegetarians who eat egg, egg white is an outstanding source for balanced proteins. It may be purchased in whole egg form and seperated from the yolk, in pasteurized liquid form, or powdered form.

5. Seitan is produced from wheat and is a relatively good source for protein.

It is best to utilize all different types of proteins in one's regular diet to maintain a well balanced and complete intake of proteins and amino-acids.