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Nope they are grinded whole, they get picked when they are ripe after they've dried on the tree when the slightest tug will have them in your hand(you'll often knock more off the tree by accident) you may want to consider it a "whole grain" and besides once they are dry it's impossible to remove the bean from its shell/husk anyways. The beans also make a great syrup as well when boiled in a double boiler(to prevent bitterness) often only snapped in half and the beans strained and then boiled further afterwards you can search "how to make mesquite bean syrup" if you're interested it's very versatile
Nooo is not eating lots of Dust eating the fine food from the MAYAN WAY por more than 7000 years living way we Drink the best fine Atole or tortillas in the whole World saludos a todos desde Colorado usa
I guess you can also say goodbye to brushing your teeth, perhaps even stop using any kind of ware--in fact, why not just stop eating and breathing because of the potential toxins in the air. & Metates are traditionally carved from volcanic rock, which is considered food safe. You have to SEASON/cure it and the more you use it the smoother it becomes just like your regular granite mortar and pestle.
It was a tough life for these people. While visiting pueblo areas we learned they were only expected to live to mid 40s. Sand was in most everything they ate and the teeth were worn down as a result.