You can get quality protein from many sources but the most common good source of protein is chicken, or, any type of lean meat. Fish is also another good protein source. Protein supplements and bars are also another good choice.
It depends on what is meant by "good". Taken protein quality, bio availability and protein amount into consideration I'd say that it's not a good source of protein.
no. they are a good source of protein and B6, a good source for energy
Whey protein is very popular among builders, since it is a good quality for a lower than average price, it becomes a popular choice because it saves money while keeping good quality.
Lecithin is extracted from Soy seed and is a very good quality protein source for vegetarians. It is good for healthy liver.
Good quality grass hay, and a low protein grain.
Beans combined with a wheat product provide a whole protein source. Tofu, from soy, is also a good source.
Eggs
EAS is a good protein powder and so is Muscle Milk but it all comes down to taste and if you want a full whey protein or a complex powder that has whey and soy. EAS is my favorite.
A measure of the essential amino acid content of a protein relative to the essential amino acid needs of the body determines the quality of a protein.
PDCAAS
two factors influence protein quality- the proteins digestibility and its amino acid composition.
The protein RDA assumes that dietary protein is from a mix of low- and high-quality sources.