The black color on the pea grains may be due to a variety of reasons, such as oxidation, mold and so on. If the black color on the peas is caused by oxidation or improper storage, you can usually eat them after removing the black part. However, if it is caused by mold, it should not be consumed because mold can lead to the production of harmful substances such as aflatoxin in pea grains, which may be harmful to human health after consumption.
Therefore, before consuming pea grains, you should carefully check their appearance and odor to make sure they are not abnormal. If the pea grains appear to have a strange odor or discoloration, etc., it is best not to consume, so as not to have an impact on health.